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@davegurnell
Created August 31, 2016 13:35
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sbt.version=0.13.13-M1
scalaOrganization in ThisBuild := "org.typelevel"
scalaVersion in ThisBuild := "2.11.8"
libraryDependencies ++= Seq("com.chuusai" %% "shapeless" % "2.3.2")
Welcome to Scala 2.11.8 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_45).
Type in expressions for evaluation. Or try :help.
scala> import shapeless.syntax.singleton._
import shapeless.syntax.singleton._
scala>
scala> var x = 42.narrow
java.lang.AssertionError: assertion failed: (16,13)
at scala.Predef$.assert(Predef.scala:186)
at scala.reflect.internal.Symbols$Symbol.updateInfo(Symbols.scala:1570)
at scala.tools.nsc.transform.SpecializeTypes$$anonfun$23$$anonfun$apply$21.apply(SpecializeTypes.scala:793)
at scala.tools.nsc.transform.SpecializeTypes$$anonfun$23$$anonfun$apply$21.apply(SpecializeTypes.scala:783)
at scala.collection.immutable.List.flatMap(List.scala:327)
at scala.tools.nsc.transform.SpecializeTypes$$anonfun$23.apply(SpecializeTypes.scala:783)
at scala.tools.nsc.transform.SpecializeTypes$$anonfun$23.apply(SpecializeTypes.scala:781)
at scala.collection.immutable.List.flatMap(List.scala:327)
at scala.tools.nsc.transform.SpecializeTypes.specializeClass(SpecializeTypes.scala:781)
at scala.tools.nsc.transform.SpecializeTypes.transformInfo(SpecializeTypes.scala:1196)
at scala.tools.nsc.transform.InfoTransform$Phase$$anon$1.transform(InfoTransform.scala:38)
at scala.reflect.internal.Symbols$Symbol.rawInfo(Symbols.scala:1614)
at scala.reflect.internal.Symbols$Symbol.info(Symbols.scala:1534)
at scala.reflect.internal.Symbols$Symbol.isDerivedValueClass(Symbols.scala:813)
at scala.reflect.internal.Symbols$Symbol.isMethodWithExtension(Symbols.scala:816)
at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.preEraseNormalApply(Erasure.scala:991)
at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.preEraseApply(Erasure.scala:1098)
at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.preErase(Erasure.scala:1108)
at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:1192)
at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:873)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1386)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:1213)
at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:873)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2589)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2587)
at scala.collection.immutable.List.loop$1(List.scala:173)
at scala.collection.immutable.List.mapConserve(List.scala:189)
at scala.reflect.api.Trees$Transformer.transformStats(Trees.scala:2587)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1366)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:1213)
at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:873)
at scala.reflect.internal.Trees$$anonfun$itransform$2.apply(Trees.scala:1363)
at scala.reflect.internal.Trees$$anonfun$itransform$2.apply(Trees.scala:1361)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2600)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:30)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:25)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:17)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1360)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:1210)
at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:873)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2589)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2587)
at scala.collection.immutable.List.loop$1(List.scala:173)
at scala.collection.immutable.List.mapConserve(List.scala:189)
at scala.reflect.api.Trees$Transformer.transformStats(Trees.scala:2587)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1404)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.scala$tools$nsc$transform$TypingTransformers$TypingTransformer$$super$transform(TypingTransformers.scala:40)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$1.apply(TypingTransformers.scala:40)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$1.apply(TypingTransformers.scala:40)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2600)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:30)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:25)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:40)
at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:1213)
at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:873)
at scala.reflect.api.Trees$Transformer.transformTemplate(Trees.scala:2563)
at scala.reflect.internal.Trees$$anonfun$itransform$4.apply(Trees.scala:1408)
at scala.reflect.internal.Trees$$anonfun$itransform$4.apply(Trees.scala:1407)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2600)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:30)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:25)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:17)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1406)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:1213)
at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:873)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2589)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2587)
at scala.collection.immutable.List.loop$1(List.scala:173)
at scala.collection.immutable.List.mapConserve(List.scala:189)
at scala.reflect.api.Trees$Transformer.transformStats(Trees.scala:2587)
at scala.reflect.internal.Trees$$anonfun$itransform$7.apply(Trees.scala:1426)
at scala.reflect.internal.Trees$$anonfun$itransform$7.apply(Trees.scala:1426)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2600)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:30)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:25)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:17)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1425)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.scala$tools$nsc$transform$TypingTransformers$TypingTransformer$$super$transform(TypingTransformers.scala:40)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$2.apply(TypingTransformers.scala:42)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$2.apply(TypingTransformers.scala:42)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2600)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:30)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:25)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:42)
at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:1213)
at scala.tools.nsc.transform.Erasure$ErasureTransformer.transform(Erasure.scala:1223)
at scala.tools.nsc.transform.Erasure$ErasureTransformer.transform(Erasure.scala:746)
at scala.tools.nsc.ast.Trees$Transformer.transformUnit(Trees.scala:147)
at scala.tools.nsc.transform.Transform$Phase.apply(Transform.scala:30)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$applyPhase$1.apply$mcV$sp(Global.scala:453)
at scala.tools.nsc.Global$GlobalPhase.withCurrentUnit(Global.scala:444)
at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:453)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:411)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:411)
at scala.collection.Iterator$class.foreach(Iterator.scala:893)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1336)
at scala.tools.nsc.Global$GlobalPhase.run(Global.scala:411)
at scala.tools.nsc.Global$Run.compileUnitsInternal(Global.scala:1514)
at scala.tools.nsc.Global$Run.compileUnits(Global.scala:1499)
at scala.tools.nsc.Global$Run.compileSources(Global.scala:1494)
at scala.tools.nsc.interpreter.IMain.compileSourcesKeepingRun(IMain.scala:435)
at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.compileAndSaveRun(IMain.scala:855)
at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.compile(IMain.scala:813)
at scala.tools.nsc.interpreter.IMain$Request$$anonfun$compile$1.apply$mcZ$sp(IMain.scala:1019)
at scala.tools.nsc.interpreter.IMain$Request$$anonfun$compile$1.apply(IMain.scala:1019)
at scala.tools.nsc.interpreter.IMain$Request$$anonfun$compile$1.apply(IMain.scala:1019)
at scala.tools.nsc.interpreter.IMain$$anonfun$withoutWarnings$1.apply(IMain.scala:108)
at scala.tools.nsc.interpreter.IMain.beQuietDuring(IMain.scala:214)
at scala.tools.nsc.interpreter.IMain.withoutWarnings(IMain.scala:103)
at scala.tools.nsc.interpreter.IMain$Request.compile$lzycompute(IMain.scala:1019)
at scala.tools.nsc.interpreter.IMain$Request.compile(IMain.scala:997)
at scala.tools.nsc.interpreter.IMain.compile(IMain.scala:579)
at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:567)
at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:565)
at scala.tools.nsc.interpreter.ILoop.interpretStartingWith(ILoop.scala:807)
at scala.tools.nsc.interpreter.ILoop.command(ILoop.scala:681)
at scala.tools.nsc.interpreter.ILoop.processLine(ILoop.scala:395)
at scala.tools.nsc.interpreter.ILoop.loop(ILoop.scala:415)
at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply$mcZ$sp(ILoop.scala:923)
at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:909)
at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:909)
at scala.reflect.internal.util.ScalaClassLoader$.savingContextLoader(ScalaClassLoader.scala:97)
at scala.tools.nsc.interpreter.ILoop.process(ILoop.scala:909)
at scala.tools.nsc.interpreter.ILoop.main(ILoop.scala:934)
at xsbt.ConsoleInterface.run(ConsoleInterface.scala:62)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at sbt.compiler.AnalyzingCompiler.call(AnalyzingCompiler.scala:101)
at sbt.compiler.AnalyzingCompiler.console(AnalyzingCompiler.scala:76)
at sbt.Console.sbt$Console$$console0$1(Console.scala:22)
at sbt.Console$$anonfun$apply$2$$anonfun$apply$1.apply$mcV$sp(Console.scala:23)
at sbt.Console$$anonfun$apply$2$$anonfun$apply$1.apply(Console.scala:23)
at sbt.Console$$anonfun$apply$2$$anonfun$apply$1.apply(Console.scala:23)
at sbt.Logger$$anon$4.apply(Logger.scala:84)
at sbt.TrapExit$App.run(TrapExit.scala:248)
at java.lang.Thread.run(Thread.java:745)
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