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tshort/explanation.md

Created April 25, 2021 22:57
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Julia crash with v1.6.1
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explanation.md

Here's the code to trigger the crash:

using Pkg
Pkg.add(url="https://github.com/tshort/Sims.jl", rev="mtk")
Pkg.add("ModelingToolkit")
using Sims, Sims.Examples.Lib
m = CauerLowPassOPV()

Here is the error on Windows:

<unknown>:0: error: starting new .cfi frame before finishing the previous one
<unknown>:0: error: this directive must appear between .cfi_startproc and .cfi_endproc directives
<unknown>:0: error: starting new .cfi frame before finishing the previous one
<unknown>:0: error: this directive must appear between .cfi_startproc and .cfi_endproc directives
ERROR: ReadOnlyMemoryError()
Stacktrace:
 [1] CauerLowPassOPV()
   @ Sims.Examples.Lib C:\XXX\.julia\dev\Sims\examples\lib\electrical.jl:84
 [2] top-level scope
   @ REPL[4]:1

Here is the segfault on Linux:

julia> m = CauerLowPassOPV()

signal (11): Segmentation fault
in expression starting at REPL[9]:1
_ZN4llvm11Instruction15eraseFromParentEv at /home/tshort/julia-1.6.1/bin/../lib/julia/libLLVM-11jl.so (unknown line)
finalize at /buildworker/worker/package_linux64/build/src/llvm-alloc-opt.cpp:380 [inlined]
runOnFunction at /buildworker/worker/package_linux64/build/src/llvm-alloc-opt.cpp:1518
_ZN4llvm13FPPassManager13runOnFunctionERNS_8FunctionE at /home/tshort/julia-1.6.1/bin/../lib/julia/libLLVM-11jl.so (unknown line)
_ZN4llvm13FPPassManager11runOnModuleERNS_6ModuleE at /home/tshort/julia-1.6.1/bin/../lib/julia/libLLVM-11jl.so (unknown line)
_ZN4llvm6legacy15PassManagerImpl3runERNS_6ModuleE at /home/tshort/julia-1.6.1/bin/../lib/julia/libLLVM-11jl.so (unknown line)
operator() at /buildworker/worker/package_linux64/build/src/jitlayers.cpp:613
_ZN4llvm3orc14IRCompileLayer4emitENS0_29MaterializationResponsibilityENS0_16ThreadSafeModuleE at /home/tshort/julia-1.6.1/bin/../lib/julia/libLLVM-11jl.so (unknown line)
_ZN4llvm3orc31BasicIRLayerMaterializationUnit11materializeENS0_29MaterializationResponsibilityE at /home/tshort/julia-1.6.1/bin/../lib/julia/libLLVM-11jl.so (unknown line)
_ZN4llvm3orc16ExecutionSession26materializeOnCurrentThreadESt10unique_ptrINS0_19MaterializationUnitESt14default_deleteIS3_EENS0_29MaterializationResponsibilityE at /home/tshort/julia-1.6.1/bin/../lib/julia/libLLVM-11jl.so (unknown line)
_ZNSt17_Function_handlerIFvSt10unique_ptrIN4llvm3orc19MaterializationUnitESt14default_deleteIS3_EENS2_29MaterializationResponsibilityEEPS8_E9_M_invokeERKSt9_Any_dataOS6_OS7_ at /home/tshort/julia-1.6.1/bin/../lib/julia/libLLVM-11jl.so (unknown line)
_ZN4llvm3orc16ExecutionSession17runOutstandingMUsEv at /home/tshort/julia-1.6.1/bin/../lib/julia/libLLVM-11jl.so (unknown line)
_ZN4llvm3orc16ExecutionSession6lookupENS0_10LookupKindERKSt6vectorISt4pairIPNS0_8JITDylibENS0_19JITDylibLookupFlagsEESaIS8_EENS0_15SymbolLookupSetENS0_11SymbolStateENS_15unique_functionIFvNS_8ExpectedINS_8DenseMapINS0_15SymbolStringPtrENS_18JITEvaluatedSymbolENS_12DenseMapInfoISI_EENS_6detail12DenseMapPairISI_SJ_EEEEEEEEESt8functionIFvRKNSH_IS6_NS_8DenseSetISI_SL_EENSK_IS6_EENSN_IS6_SV_EEEEEE at /home/tshort/julia-1.6.1/bin/../lib/julia/libLLVM-11jl.so (unknown line)
_ZN4llvm3orc16ExecutionSession6lookupERKSt6vectorISt4pairIPNS0_8JITDylibENS0_19JITDylibLookupFlagsEESaIS7_EERKNS0_15SymbolLookupSetENS0_10LookupKindENS0_11SymbolStateESt8functionIFvRKNS_8DenseMapIS5_NS_8DenseSetINS0_15SymbolStringPtrENS_12DenseMapInfoISK_EEEENSL_IS5_EENS_6detail12DenseMapPairIS5_SN_EEEEEE at /home/tshort/julia-1.6.1/bin/../lib/julia/libLLVM-11jl.so (unknown line)
_ZN4llvm3orc16ExecutionSession6lookupERKSt6vectorISt4pairIPNS0_8JITDylibENS0_19JITDylibLookupFlagsEESaIS7_EENS0_15SymbolStringPtrENS0_11SymbolStateE at /home/tshort/julia-1.6.1/bin/../lib/julia/libLLVM-11jl.so (unknown line)
_ZN4llvm3orc16ExecutionSession6lookupENS_8ArrayRefIPNS0_8JITDylibEEENS0_15SymbolStringPtrENS0_11SymbolStateE at /home/tshort/julia-1.6.1/bin/../lib/julia/libLLVM-11jl.so (unknown line)
_ZN4llvm3orc16ExecutionSession6lookupENS_8ArrayRefIPNS0_8JITDylibEEENS_9StringRefENS0_11SymbolStateE at /home/tshort/julia-1.6.1/bin/../lib/julia/libLLVM-11jl.so (unknown line)
addModule at /buildworker/worker/package_linux64/build/src/jitlayers.cpp:788
jl_add_to_ee at /buildworker/worker/package_linux64/build/src/jitlayers.cpp:1067
jl_add_to_ee at /buildworker/worker/package_linux64/build/src/jitlayers.cpp:1111
jl_add_to_ee at /buildworker/worker/package_linux64/build/src/jitlayers.cpp:1133 [inlined]
_jl_compile_codeinst at /buildworker/worker/package_linux64/build/src/jitlayers.cpp:154
jl_generate_fptr at /buildworker/worker/package_linux64/build/src/jitlayers.cpp:352
jl_compile_method_internal at /buildworker/worker/package_linux64/build/src/gf.c:1970
jl_compile_method_internal at /buildworker/worker/package_linux64/build/src/gf.c:2236 [inlined]
_jl_invoke at /buildworker/worker/package_linux64/build/src/gf.c:2229 [inlined]
jl_apply_generic at /buildworker/worker/package_linux64/build/src/gf.c:2419
CauerLowPassOPV at /home/tshort/.julia/packages/Sims/xseDP/examples/lib/electrical.jl:84
unknown function (ip: 0x7f7db0e8c1ec)
_jl_invoke at /buildworker/worker/package_linux64/build/src/gf.c:2237 [inlined]
jl_apply_generic at /buildworker/worker/package_linux64/build/src/gf.c:2419
jl_apply at /buildworker/worker/package_linux64/build/src/julia.h:1703 [inlined]
do_call at /buildworker/worker/package_linux64/build/src/interpreter.c:115
eval_value at /buildworker/worker/package_linux64/build/src/interpreter.c:204
eval_stmt_value at /buildworker/worker/package_linux64/build/src/interpreter.c:155 [inlined]
eval_body at /buildworker/worker/package_linux64/build/src/interpreter.c:562
jl_interpret_toplevel_thunk at /buildworker/worker/package_linux64/build/src/interpreter.c:670
jl_toplevel_eval_flex at /buildworker/worker/package_linux64/build/src/toplevel.c:877
jl_toplevel_eval_flex at /buildworker/worker/package_linux64/build/src/toplevel.c:825
jl_toplevel_eval_in at /buildworker/worker/package_linux64/build/src/toplevel.c:929
eval at ./boot.jl:360 [inlined]
eval_user_input at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/REPL/src/REPL.jl:139
repl_backend_loop at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/REPL/src/REPL.jl:200
start_repl_backend at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/REPL/src/REPL.jl:185
#run_repl#42 at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/REPL/src/REPL.jl:317
run_repl at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/REPL/src/REPL.jl:305
_jl_invoke at /buildworker/worker/package_linux64/build/src/gf.c:2237 [inlined]
jl_apply_generic at /buildworker/worker/package_linux64/build/src/gf.c:2419
#874 at ./client.jl:387
jfptr_YY.874_41532.clone_1 at /home/tshort/julia-1.6.1/lib/julia/sys.so (unknown line)
_jl_invoke at /buildworker/worker/package_linux64/build/src/gf.c:2237 [inlined]
jl_apply_generic at /buildworker/worker/package_linux64/build/src/gf.c:2419
jl_apply at /buildworker/worker/package_linux64/build/src/julia.h:1703 [inlined]
jl_f__call_latest at /buildworker/worker/package_linux64/build/src/builtins.c:714
#invokelatest#2 at ./essentials.jl:708 [inlined]
invokelatest at ./essentials.jl:706 [inlined]
run_main_repl at ./client.jl:372
exec_options at ./client.jl:302
_start at ./client.jl:485
jfptr__start_34289.clone_1 at /home/tshort/julia-1.6.1/lib/julia/sys.so (unknown line)
_jl_invoke at /buildworker/worker/package_linux64/build/src/gf.c:2237 [inlined]
jl_apply_generic at /buildworker/worker/package_linux64/build/src/gf.c:2419
jl_apply at /buildworker/worker/package_linux64/build/src/julia.h:1703 [inlined]
true_main at /buildworker/worker/package_linux64/build/src/jlapi.c:560
repl_entrypoint at /buildworker/worker/package_linux64/build/src/jlapi.c:702
main at /buildworker/worker/package_linux64/build/cli/loader_exe.c:51
__libc_start_main at /lib/x86_64-linux-gnu/libc.so.6 (unknown line)
_start at julia-1.6.1/bin/julia (unknown line)
Allocations: 28487662 (Pool: 28477850; Big: 9812); GC: 29
Segmentation fault
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tshort commented Apr 25, 2021

Here's what I know about it:

  • The code works fine in Julia v1.5.3.
  • The function that errors works fine when run as part of tests. It fails in the REPL.

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