double free or corruption (!prev)

[Thomas Mader]

On some machines there are errors when running the unittests for 
the ldc 1.15.0 package on NixOS which I don't have an explanation 
for yet.
Maybe someone knows what the problem might be.
I can not reproduce the problem on my machines.

[ 83%] Generating objects-unittest/std/string.o
double free or corruption (!prev)
#0 0x00007ffff4fb4dba 
llvm::sys::PrintStackTrace(llvm::raw_ostream&) 
(/nix/store/166lj5aam0w5qiim9f5a9qccbc6fy2kq-llvm-5.0.2-lib/lib/libLLVM-5.0.so+0x872dba)
#1 0x00007ffff4fb2c76 llvm::sys::RunSignalHandlers() 
(/nix/store/166lj5aam0w5qiim9f5a9qccbc6fy2kq-llvm-5.0.2-lib/lib/libLLVM-5.0.so+0x870c76)
#2 0x00007ffff4fb2dbc SignalHandler(int) 
(/nix/store/166lj5aam0w5qiim9f5a9qccbc6fy2kq-llvm-5.0.2-lib/lib/libLLVM-5.0.so+0x870dbc)
#3 0x00007ffff4724860 __restore_rt 
(/nix/store/681354n3k44r8z90m35hm8945vsp95h1-glibc-2.27/lib/libpthread.so.0+0x12860)
#4 0x00007ffff4059be0 __GI_raise 
(/nix/store/681354n3k44r8z90m35hm8945vsp95h1-glibc-2.27/lib/libc.so.6+0x35be0)
#5 0x00007ffff405adc1 __GI_abort 
(/nix/store/681354n3k44r8z90m35hm8945vsp95h1-glibc-2.27/lib/libc.so.6+0x36dc1)
#6 0x00007ffff409b2ac 
(/nix/store/681354n3k44r8z90m35hm8945vsp95h1-glibc-2.27/lib/libc.so.6+0x772ac)
#7 0x00007ffff40a149a 
(/nix/store/681354n3k44r8z90m35hm8945vsp95h1-glibc-2.27/lib/libc.so.6+0x7d49a)
#8 0x00007ffff40a23ec _int_free 
(/nix/store/681354n3k44r8z90m35hm8945vsp95h1-glibc-2.27/lib/libc.so.6+0x7e3ec)
#9 0x00007ffff506e884 llvm::Instruction::eraseFromParent() 
(/nix/store/166lj5aam0w5qiim9f5a9qccbc6fy2kq-llvm-5.0.2-lib/lib/libLLVM-5.0.so+0x92c884)
#10 0x00007ffff5b48a4e 
llvm::SROA::deleteDeadInstructions(llvm::SmallPtrSetImpl<llvm::AllocaInst*>&) (/nix/store/166lj5aam0w5qiim9f5a9qccbc6fy2kq-llvm-5.0.2-lib/lib/libLLVM-5.0.so+0x1406a4e)
#11 0x00007ffff5b54477 llvm::SROA::runImpl(llvm::Function&, 
llvm::DominatorTree&, llvm::AssumptionCache&) 
(/nix/store/166lj5aam0w5qiim9f5a9qccbc6fy2kq-llvm-5.0.2-lib/lib/libLLVM-5.0.so+0x1412477)
#12 0x00007ffff5b55a0c 
llvm::sroa::SROALegacyPass::runOnFunction(llvm::Function&) 
(/nix/store/166lj5aam0w5qiim9f5a9qccbc6fy2kq-llvm-5.0.2-lib/lib/libLLVM-5.0.so+0x1413a0c)
#13 0x00007ffff5098b01 
llvm::FPPassManager::runOnFunction(llvm::Function&) 
(/nix/store/166lj5aam0w5qiim9f5a9qccbc6fy2kq-llvm-5.0.2-lib/lib/libLLVM-5.0.so+0x956b01)
#14 0x00007ffff5098bfc 
llvm::legacy::FunctionPassManagerImpl::run(llvm::Function&) 
(/nix/store/166lj5aam0w5qiim9f5a9qccbc6fy2kq-llvm-5.0.2-lib/lib/libLLVM-5.0.so+0x956bfc)
#15 0x00007ffff509901c 
llvm::legacy::FunctionPassManager::run(llvm::Function&) 
(/nix/store/166lj5aam0w5qiim9f5a9qccbc6fy2kq-llvm-5.0.2-lib/lib/libLLVM-5.0.so+0x95701c)
#16 0x0000000000890793 ldc_optimize_module(llvm::Module*) 
(/build/ldc-1.15.0-src/build/bin/ldc2+0x890793)
#17 0x0000000000945808 writeModule(llvm::Module*, char const*) 
(/build/ldc-1.15.0-src/build/bin/ldc2+0x945808)
#18 0x00000000009420ae 
ldc::CodeGenerator::writeAndFreeLLModule(char const*) 
(/build/ldc-1.15.0-src/build/bin/ldc2+0x9420ae)
#19 0x00000000009423ae ldc::CodeGenerator::emit(Module*) 
(/build/ldc-1.15.0-src/build/bin/ldc2+0x9423ae)
#20 0x000000000091412e codegenModules(Array<Module*>&) 
(/build/ldc-1.15.0-src/build/bin/ldc2+0x91412e)
#21 0x00000000007c8cc3 mars_mainBody(Param&, Array<char const*>&, 
Array<char const*>&) 
(/build/ldc-1.15.0-src/build/bin/ldc2+0x7c8cc3)
#22 0x000000000091272d cppmain(int, char**) 
(/build/ldc-1.15.0-src/build/bin/ldc2+0x91272d)
#23 0x00000000009fee2f 
_D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ6runAllMFZ9__lambda1MFZv 
(/build/ldc-1.15.0-src/build/bin/ldc2+0x9fee2f)
#24 0x00000000009fed74 
_D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ7tryExecMFMDFZvZv 
(/build/ldc-1.15.0-src/build/bin/ldc2+0x9fed74)
#25 0x00000000009fec93 _d_run_main 
(/build/ldc-1.15.0-src/build/bin/ldc2+0x9fec93)
#26 0x00007ffff4046b8e __libc_start_main 
(/nix/store/681354n3k44r8z90m35hm8945vsp95h1-glibc-2.27/lib/libc.so.6+0x22b8e)
#27 0x0000000000656f0a _start 
/build/glibc-2.27/csu/../sysdeps/x86_64/start.S:122:0
make[3]: *** 
[runtime/CMakeFiles/phobos2-ldc-unittest-common.dir/build.make:1688: runtime/objects-unittest/std/string.o] Aborted
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [CMakeFiles/Makefile2:679: 
runtime/CMakeFiles/phobos2-ldc-unittest-common.dir/all] Error 2
make[1]: *** [CMakeFiles/Makefile2:1780: 
runtime/CMakeFiles/all-test-runners.dir/rule] Error 2
make: *** [Makefile:782: all-test-runners] Error 2

https://github.com/NixOS/nixpkgs/pull/59197#issuecomment-481701148