[LLVMbugs] [Bug 7920] New: Using const wchar_t and compiling with -g causes segfault.

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=7920

           Summary: Using const wchar_t and compiling with -g causes
                    segfault.
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: hans at chromium.org
                CC: llvmbugs at cs.uiuc.edu


The following code causes a segfault when compiling it with the -g flag:

void foo() {
  const wchar_t c = L'x';
  wchar_t d = c;
}

Using Clang built from r111120 gives the following output:

0  clang           0x00000000018f32ef
1  clang           0x00000000018f3a77
2  libpthread.so.0 0x00007f62df1af7d0
3  clang           0x00000000016f27f5
llvm::DIDescriptor::getUInt64Field(unsigned int) const + 53
4  clang           0x00000000013faa4c
llvm::DwarfDebug::constructGlobalVariableDIE(llvm::MDNode const*) + 2716
5  clang           0x000000000140168f
llvm::DwarfDebug::beginModule(llvm::Module*) + 575
6  clang           0x000000000140251d
llvm::DwarfDebug::DwarfDebug(llvm::AsmPrinter*, llvm::Module*) + 2653
7  clang           0x00000000013e2ee7
llvm::AsmPrinter::doInitialization(llvm::Module&) + 775
8  clang           0x000000000182f9d5
llvm::FPPassManager::doInitialization(llvm::Module&) + 85
9  clang           0x0000000001834123
llvm::FunctionPassManagerImpl::doInitialization(llvm::Module&) + 115
10 clang           0x0000000001834601
llvm::FunctionPassManager::doInitialization() + 17
11 clang           0x00000000007caa8e
clang::EmitBackendOutput(clang::Diagnostic&, clang::CodeGenOptions const&,
clang::TargetOptions const&, llvm::Module*, clang::BackendAction,
llvm::raw_ostream*) + 1230
12 clang           0x00000000007c6925
13 clang           0x0000000000927278 clang::ParseAST(clang::Sema&, bool) + 680
14 clang           0x00000000007c7312 clang::CodeGenAction::ExecuteAction() +
66
15 clang           0x00000000006929b1
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 353
16 clang           0x00000000006ab3b5
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 1253
17 clang           0x00000000006884f4 cc1_main(char const**, char const**, char
const*, void*) + 484
18 clang           0x000000000068fdd1 main + 5393
19 libc.so.6       0x00007f62de4bf1c4 __libc_start_main + 244
20 clang           0x0000000000686db9
Stack dump:
0.      Program arguments: /work/llvm/Release+Asserts/bin/clang -cc1 -triple
x86_64-unknown-linux-gnu -S -disable-free -main-file-name a.cc
-mrelocation-model static -mdisable-fp-elim -mconstructor-aliases
-munwind-tables -target-cpu x86-64 -target-linker-version 2.18.0.20080103 -g
-resource-dir /work/llvm/Release+Asserts/lib/clang/2.8 -ferror-limit 19
-fmessage-length 80 -fexceptions -fgnu-runtime -fdiagnostics-show-option
-fcolor-diagnostics -o /tmp/cc-GAr20i.s -x c++ a.cc 
1.      <eof> parser at end of file
2.      Code generation
clang: error: clang frontend command failed due to signal 11 (use -v to see
invocation)

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