[llvm-dev] lib/CodeGen/AsmPrinter/DwarfDebug.h:131: void llvm::DbgVariable::addMMIEntry(const llvm::DbgVariable&): Assertion `V.Var == Var && "conflicting variable"' failed.

[Kostya Serebryany via llvm-dev]

David, Dean, all,

The bots got red today with assertion failures in
llvm::DbgVariable::addMMIEntry:
http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux/builds/1816/steps/check-msan%20in%20gcc%20build/logs/stdio
I did not find the offender yet. Any ideas?

clang-5.0: /mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:131:
void llvm::DbgVariable::addMMIEntry(const llvm::DbgVariable&):
Assertion `V.Var == Var && "conflicting variable"' failed.
clang-5.0: /mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:131:
void llvm::DbgVariable::addMMIEntry(const llvm::DbgVariable&):
Assertion `V.Var == Var && "conflicting variable"' failed.
#0 0x0000000002000bea llvm::sys::PrintStackTrace(llvm::raw_ostream&)
/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/lib/Support/Unix/Signals.inc:402:0
#1 0x0000000001ffea1e llvm::sys::RunSignalHandlers()
/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/lib/Support/Signals.cpp:44:0
#2 0x0000000001ffeb92 SignalHandler(int)
/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/lib/Support/Unix/Signals.inc:242:0
#3 0x00007fa903bee390 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x11390)
#4 0x00007fa902b7b428 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x35428)
#5 0x00007fa902b7d02a abort (/lib/x86_64-linux-gnu/libc.so.6+0x3702a)
#6 0x00007fa902b73bd7 (/lib/x86_64-linux-gnu/libc.so.6+0x2dbd7)
#7 0x00007fa902b73c82 (/lib/x86_64-linux-gnu/libc.so.6+0x2dc82)
#8 0x0000000002601cd4 llvm::DbgVariable::addMMIEntry(llvm::DbgVariable
const&) /mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:130:0
#9 0x0000000002601cd4
llvm::DwarfFile::addScopeVariable(llvm::LexicalScope*,
llvm::DbgVariable*)
/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/lib/CodeGen/AsmPrinter/DwarfFile.cpp:104:0
#10 0x00000000025f5a29
llvm::DwarfDebug::createAbstractVariable(llvm::DILocalVariable const*,
llvm::LexicalScope*)
/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp:746:0#11
0x00000000025f5cf4
llvm::DwarfDebug::ensureAbstractVariableIsCreatedIfScoped(std::pair<llvm::DILocalVariable
const*, llvm::DILocation const*>, llvm::MDNode const*)
/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp:767:0
#12 0x00000000025f5d38
llvm::DwarfDebug::createConcreteVariable(llvm::LexicalScope&,
std::pair<llvm::DILocalVariable const*, llvm::DILocation const*>)
/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp:961:0
#13 0x00000000025f901c
llvm::DwarfDebug::collectVariableInfo(llvm::DwarfCompileUnit&,
llvm::DISubprogram const*,
llvm::DenseSet<std::pair<llvm::DILocalVariable const*,
llvm::DILocation const*>,
llvm::DenseMapInfo<std::pair<llvm::DILocalVariable const*,
llvm::DILocation const*> > >&)
/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp:1005:0
#14 0x00000000025f9ae8
llvm::DwarfDebug::endFunctionImpl(llvm::MachineFunction const*)
/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp:1208:0
#15 0x000000000262f75a
llvm::DebugHandlerBase::endFunction(llvm::MachineFunction const*)
/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp:256:0
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