layus · March 5, 2022 22:11
diff --git a/gistfile1.txt b/gistfile1.txt
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 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure { operator = true; }'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> attribute '</span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">startSet</span><span style="color:#f8f8f2;">' missing for call to '</span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">genericClosure</span><span style="color:#f8f8f2;">'</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:25</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { operator = true; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                         </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">   7</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">(use '--show-trace' to show detailed location information)</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> attribute '</span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">startSet</span><span style="color:#f8f8f2;">' missing for call to '</span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">genericClosure</span><span style="color:#f8f8f2;">'</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:25</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { operator = true; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                         </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">   7</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">(use '--show-trace' to show detailed location information)</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure { startSet = [1]; operator = true; }'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> value is </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">an integer</span><span style="color:#f8f8f2;"> while a set was expected</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [1]; operator = true; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">While evaluating the `operator` attribute passed to builtins.genericClosure</span><span style="color:#f8f8f2;">: value is </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">a Boolean</span><span style="color:#f8f8f2;"> while a function was expected</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [1]; operator = true; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure { startSet = [1]; operator = n: if n &lt; 5 then n+1 else []; }'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> value is </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">an integer</span><span style="color:#f8f8f2;"> while a set was expected</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [1]; operator = n: if n &lt; 5 then n+1 else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">While evaluating one item to be part of the genericClosure</span><span style="color:#f8f8f2;">: value is </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">an integer</span><span style="color:#f8f8f2;"> while a set was expected</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [1]; operator = n: if n &lt; 5 then n+1 else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure { startSet = [1]; operator = n: if n &lt; 5 then {value = n+1;} else []; }'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> value is </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">an integer</span><span style="color:#f8f8f2;"> while a set was expected</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [1]; operator = n: if n &lt; 5 then {value = n+1;} else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">While evaluating one item to be part of the genericClosure</span><span style="color:#f8f8f2;">: value is </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">an integer</span><span style="color:#f8f8f2;"> while a set was expected</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [1]; operator = n: if n &lt; 5 then {value = n+1;} else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure { startSet = [1]; operator = n: if n &lt; 5 then [n+1] else []; }'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> syntax error, unexpected '+'</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:73</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [1]; operator = n: if n &lt; 5 then [n+1] else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                                                                         </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> syntax error, unexpected '+'</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:73</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [1]; operator = n: if n &lt; 5 then [n+1] else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                                                                         </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure { startSet = [1]; operator = n: if n &lt; 5 then [(n+1)] else []; }'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> value is </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">an integer</span><span style="color:#f8f8f2;"> while a set was expected</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [1]; operator = n: if n &lt; 5 then [(n+1)] else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">While evaluating one item to be part of the genericClosure</span><span style="color:#f8f8f2;">: value is </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">an integer</span><span style="color:#f8f8f2;"> while a set was expected</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [1]; operator = n: if n &lt; 5 then [(n+1)] else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure { startSet = [{value = 1;}]; operator = n: if n &lt; 5 then [(n+1)] else []; }'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> attribute 'key' required</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [{value = 1;}]; operator = n: if n &lt; 5 then [(n+1)] else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> While evaluating one of the attribute sets to be part of the genericClosure: attribute `key` required</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [{value = 1;}]; operator = n: if n &lt; 5 then [(n+1)] else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure { startSet = [{key = 1; value = 1;}]; operator = n: if n &lt; 5 then [(n+1)] else []; }'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> cannot compare </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">a set</span><span style="color:#f8f8f2;"> with </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">an integer</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> </span><span style="font-weight:bold;color:purple;"></span><span style="color:#f8f8f2;">: cannot compare </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">a set</span><span style="color:#f8f8f2;"> with </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">an integer</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:82</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [{key = 1; value = 1;}]; operator = n: if n &lt; 5 then [(n+1)] else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                                                                                  </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure { startSet = [{key = 1; value = 1;}]; operator = n: if n.key &lt; 5 then [(n+1)] else []; }'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> cannot coerce a set to a string</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:97</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [{key = 1; value = 1;}]; operator = n: if n.key &lt; 5 then [(n+1)] else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                                                                                                 </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> </span><span style="font-weight:bold;color:purple;"></span><span style="color:#f8f8f2;">: cannot coerce </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">a set</span><span style="color:#f8f8f2;"> to a string</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:97</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [{key = 1; value = 1;}]; operator = n: if n.key &lt; 5 then [(n+1)] else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                                                                                                 </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure { startSet = [{key = 1; value = 1;}]; operator = n: if n.value &lt; 5 then [(n+1)] else []; }'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> cannot coerce a set to a string</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:99</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [{key = 1; value = 1;}]; operator = n: if n.value &lt; 5 then [(n+1)] else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                                                                                                   </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> </span><span style="font-weight:bold;color:purple;"></span><span style="color:#f8f8f2;">: cannot coerce </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">a set</span><span style="color:#f8f8f2;"> to a string</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:99</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [{key = 1; value = 1;}]; operator = n: if n.value &lt; 5 then [(n+1)] else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                                                                                                   </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure { startSet = [{key = 1; value = 1;}]; operator = n: if n.value &lt; 5 then [(n.value+1)] else []; }'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> value is </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">an integer</span><span style="color:#f8f8f2;"> while a set was expected</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [{key = 1; value = 1;}]; operator = n: if n.value &lt; 5 then [(n.value+1)] else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">While evaluating one item to be part of the genericClosure</span><span style="color:#f8f8f2;">: value is </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">an integer</span><span style="color:#f8f8f2;"> while a set was expected</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [{key = 1; value = 1;}]; operator = n: if n.value &lt; 5 then [(n.value+1)] else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure { startSet = [{key = 1; value = 1;}]; operator = n: if n.value &lt; 5 then [{key = n.value+1; value = n.valule+1;}] else []; }'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> attribute '</span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">valule</span><span style="color:#f8f8f2;">' missing</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:124</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [{key = 1; value = 1;}]; operator = n: if n.value &lt; 5 then [{key = n.value+1; value = n.valule+1;}] else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                                                                                                                            </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">   7</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">(use '--show-trace' to show detailed location information)</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> attribute '</span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">valule</span><span style="color:#f8f8f2;">' missing</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:124</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure { startSet = [{key = 1; value = 1;}]; operator = n: if n.value &lt; 5 then [{key = n.value+1; value = n.valule+1;}] else []; }</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                                                                                                                            </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">   7</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">(use '--show-trace' to show detailed location information)</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure { startSet = [{key = 1; value = 1;}]; operator = n: if n.value &lt; 5 then [{key = n.value+1; value = n.value+1;}] else []; }'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">[ { key = 1; value = 1; } { key = 2; value = 2; } { key = 3; value = 3; } { key = 4; value = 4; } { key = 5; value = 5; } ]</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">[ { key = 1; value = 1; } { key = 2; value = 2; } { key = 3; value = 3; } { key = 4; value = 4; } { key = 5; value = 5; } ]</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">&lt;PRIMOP&gt;</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">&lt;PRIMOP&gt;</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure false'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> value is </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">a Boolean</span><span style="color:#f8f8f2;"> while a set was expected</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure false</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">While evaluating the first argument passed to builtins.genericClosure</span><span style="color:#f8f8f2;">: value is </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">a Boolean</span><span style="color:#f8f8f2;"> while a set was expected</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure false</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure {}'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> attribute '</span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">startSet</span><span style="color:#f8f8f2;">' missing for call to '</span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">genericClosure</span><span style="color:#f8f8f2;">'</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:25</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure {}</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                         </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">   7</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">(use '--show-trace' to show detailed location information)</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> attribute '</span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">startSet</span><span style="color:#f8f8f2;">' missing for call to '</span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">genericClosure</span><span style="color:#f8f8f2;">'</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:25</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure {}</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                         </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">   7</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">(use '--show-trace' to show detailed location information)</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure {startSet = {};}'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> value is </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">a set</span><span style="color:#f8f8f2;"> while a list was expected</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure {startSet = {};}</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">While evaluating the `startSet` attribute passed to builtins.genericClosure</span><span style="color:#f8f8f2;">: value is </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">a set</span><span style="color:#f8f8f2;"> while a list was expected</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure {startSet = {};}</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure {startSet = [];}'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> attribute '</span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">operator</span><span style="color:#f8f8f2;">' missing for call to '</span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">genericClosure</span><span style="color:#f8f8f2;">'</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:25</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure {startSet = [];}</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                         </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">   7</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">(use '--show-trace' to show detailed location information)</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> attribute '</span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">operator</span><span style="color:#f8f8f2;">' missing for call to '</span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">genericClosure</span><span style="color:#f8f8f2;">'</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:25</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure {startSet = [];}</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                         </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">   7</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">(use '--show-trace' to show detailed location information)</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure {startSet = []; operator = false;}'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">[ ]</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">While evaluating the `operator` attribute passed to builtins.genericClosure</span><span style="color:#f8f8f2;">: value is </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">a Boolean</span><span style="color:#f8f8f2;"> while a function was expected</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure {startSet = []; operator = false;}</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure {startSet = []; operator = x : x+1;}'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">[ ]</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">[ ]</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure {startSet = [{}]; operator = x : x+1;}'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> attribute 'key' required</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure {startSet = [{}]; operator = x : x+1;}</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> While evaluating one of the attribute sets to be part of the genericClosure: attribute `key` required</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure {startSet = [{}]; operator = x : x+1;}</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure {startSet = [{key = 1;}]; operator = x : x+1;}'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> cannot coerce a set to a string</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:66</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure {startSet = [{key = 1;}]; operator = x : x+1;}</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                                                                  </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> </span><span style="font-weight:bold;color:purple;"></span><span style="color:#f8f8f2;">: cannot coerce </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">a set</span><span style="color:#f8f8f2;"> to a string</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:66</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure {startSet = [{key = 1;}]; operator = x : x+1;}</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                                                                  </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure {startSet = [{key = 1;}]; operator = x : { key = x.key+1;}'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> syntax error, unexpected end of file, expecting ';'</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:82</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure {startSet = [{key = 1;}]; operator = x : { key = x.key+1;}</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                                                                                  </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> syntax error, unexpected end of file, expecting ';'</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:82</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure {startSet = [{key = 1;}]; operator = x : { key = x.key+1;}</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                                                                                  </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure {startSet = [{key = 1;}]; operator = x : { key = x.key+1;} ;}'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> value is </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">a set</span><span style="color:#f8f8f2;"> while a list was expected</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure {startSet = [{key = 1;}]; operator = x : { key = x.key+1;} ;}</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">While evaluating the return value of the `operator` passed to builtins.genericClosure</span><span style="color:#f8f8f2;">: value is </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">a set</span><span style="color:#f8f8f2;"> while a list was expected</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:1</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.genericClosure {startSet = [{key = 1;}]; operator = x : { key = x.key+1;} ;}</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             | </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure {startSet = [{key = 1;}]; operator = x : if x.key &lt; 5 then [{ key = x.key+1;}] else [];}'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">[ { key = 1; } { key = 2; } { key = 3; } { key = 4; } { key = 5; } ]</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">[ { key = 1; } { key = 2; } { key = 3; } { key = 4; } { key = 5; } ]</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.genericClosure {startSet = [{key = 1;}]; operator = x : if x.key &lt; 5 then [{key=x.key + 1;} { key = x.key * 2;}] else [];}'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">[ { key = 1; } { key = 2; } { key = 3; } { key = 4; } { key = 6; } { key = 5; } { key = 8; } ]</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">[ { key = 1; } { key = 2; } { key = 3; } { key = 4; } { key = 6; } { key = 5; } { key = 8; } ]</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.sort (builtins.genericClosure {startSet = [{key = 1;}]; operator = x : if x.key &lt; 5 then [{key=x.key + 1;} { key = x.key * 2;}] else [];})'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">&lt;PRIMOP-APP&gt;</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">&lt;PRIMOP-APP&gt;</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.sort (a: b: a &lt; b) (builtins.genericClosure {startSet = [{key = 1;}]; operator = x : if x.key &lt; 5 then [{key=x.key + 1;} { key = x.key * 2;}] else [];})'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> cannot compare </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">a set</span><span style="color:#f8f8f2;"> with </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">a set</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">error:</span><span style="color:#f8f8f2;"> </span><span style="font-weight:bold;color:purple;"></span><span style="color:#f8f8f2;">: cannot compare </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">a set</span><span style="color:#f8f8f2;"> with </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">a set</span>
 <span style="color:#404040;">   2</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   3</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">       </span><span style="font-weight:bold;color:blue;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:blue;">at </span><span style="font-weight:bold;color:purple;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:purple;">«string»:1:24</span><span style="color:#f8f8f2;">:</span>
 <span style="color:#404040;">   4</span> <span style="color:#404040;">│</span> 
 <span style="color:#404040;">   5</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">            1| builtins.sort (a: b: a &lt; b) (builtins.genericClosure {startSet = [{key = 1;}]; operator = x : if x.key &lt; 5 then [{key=x.key + 1;} { key = x.key * 2;}] else [];})</span>
 <span style="color:#404040;">   6</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">             |                        </span><span style="font-weight:bold;color:red;"></span><span style="font-weight:bold;color:#f8f8f2;"></span><span style="font-weight:bold;color:red;">^</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Command line</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">nix-instantiate --eval --expr 'builtins.sort (a: b: a.key &lt; b.key) (builtins.genericClosure {startSet = [{key = 1;}]; operator = x : if x.key &lt; 5 then [{key=x.key + 1;} { key = x.key * 2;}] else [];})'</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output before</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">[ { key = 1; } { key = 2; } { key = 3; } { key = 4; } { key = 5; } { key = 6; } { key = 8; } ]</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">─────┬──────────────────────────────────────────────────────────────────────────</span>
     <span style="color:#404040;">│ </span>File: <span style="font-weight:bold;">Output after</span>
 <span style="color:#404040;">─────┼──────────────────────────────────────────────────────────────────────────</span>
 <span style="color:#404040;">   1</span> <span style="color:#404040;">│</span> <span style="color:#f8f8f2;">[ { key = 1; } { key = 2; } { key = 3; } { key = 4; } { key = 5; } { key = 6; } { key = 8; } ]</span>
 <span style="color:#404040;">─────┴──────────────────────────────────────────────────────────────────────────</span>



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