[llvm-bugs] [Bug 44948] New: Crash with template code and -fopenmp

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=44948

            Bug ID: 44948
           Summary: Crash with template code and -fopenmp
           Product: OpenMP
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Keywords: compile-fail, regression
          Severity: enhancement
          Priority: P
         Component: Clang Compiler Support
          Assignee: unassignedclangbugs at nondot.org
          Reporter: v.reichelt at netcologne.de
                CC: llvm-bugs at lists.llvm.org

The following code snippet triggers a segfault when compiled with "-fopenmp"
(although the code does not contain any OpenMP pragma at all):

=====================================
template<typename T> struct A
{
  ~A();
  T t;
};

template<typename T> A<T>::~A()
{
  delete t.p;
}
=====================================

This is a recent regression that was introduced between commits 65e843c9e0b
(OK) and 377b0e2b06f (broken).


Stack dump:
0.      Program arguments: /LLVM-trunk/bin/clang++ -fopenmp -c CLbug.cc 
1.      <eof> parser at end of file
 #0 0x00000000027b066a llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/LLVM-trunk/bin/clang+++0x27b066a)
 #1 0x00000000027ae1d4 llvm::sys::RunSignalHandlers()
(/LLVM-trunk/bin/clang+++0x27ae1d4)
 #2 0x00000000027ae42b llvm::sys::CleanupOnSignal(unsigned long)
(/LLVM-trunk/bin/clang+++0x27ae42b)
 #3 0x0000000002728978 CrashRecoverySignalHandler(int)
(/LLVM-trunk/bin/clang+++0x2728978)
 #4 0x00007f6debd23680 __restore_rt (/lib64/libpthread.so.0+0xf680)
 #5 0x0000000004b1b413 clang::QualType::getSplitDesugaredType(clang::QualType)
(/LLVM-trunk/bin/clang+++0x4b1b413)
 #6 0x00000000047ea768 clang::ASTContext::getBaseElementType(clang::QualType)
const (/LLVM-trunk/bin/clang+++0x47ea768)
 #7 0x0000000003ff7dc2 clang::StmtVisitorBase<std::add_pointer, (anonymous
namespace)::DeferredDiagnosticsEmitter, void>::Visit(clang::Stmt*)
(/LLVM-trunk/bin/clang+++0x3ff7dc2)
 #8 0x0000000003ff8202 clang::EvaluatedExprVisitorBase<std::add_pointer,
(anonymous namespace)::DeferredDiagnosticsEmitter>::VisitStmt(clang::Stmt*)
(/LLVM-trunk/bin/clang+++0x3ff8202)
 #9 0x0000000003ff7e3b clang::StmtVisitorBase<std::add_pointer, (anonymous
namespace)::DeferredDiagnosticsEmitter, void>::Visit(clang::Stmt*)
(/LLVM-trunk/bin/clang+++0x3ff7e3b)
#10 0x0000000003ff4cf4 (anonymous
namespace)::DeferredDiagnosticsEmitter::visitUsedDecl(clang::SourceLocation,
clang::Decl*) (/LLVM-trunk/bin/clang+++0x3ff4cf4)
#11 0x0000000003ff49c7 (anonymous
namespace)::DeferredDiagnosticsEmitter::visitUsedDecl(clang::SourceLocation,
clang::Decl*) (/LLVM-trunk/bin/clang+++0x3ff49c7)
#12 0x0000000003ff512b clang::Sema::emitDeferredDiags()
(/LLVM-trunk/bin/clang+++0x3ff512b)
#13 0x0000000003ff536a
clang::Sema::ActOnEndOfTranslationUnitFragment(clang::Sema::TUFragmentKind)
(.part.1636) (/LLVM-trunk/bin/clang+++0x3ff536a)
#14 0x0000000003ff5a6e clang::Sema::ActOnEndOfTranslationUnit()
(/LLVM-trunk/bin/clang+++0x3ff5a6e)
#15 0x0000000003f1e063
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, bool)
(/LLVM-trunk/bin/clang+++0x3f1e063)
#16 0x0000000003f141b9 clang::ParseAST(clang::Sema&, bool, bool)
(/LLVM-trunk/bin/clang+++0x3f141b9)
#17 0x000000000352ca28 clang::CodeGenAction::ExecuteAction()
(/LLVM-trunk/bin/clang+++0x352ca28)
#18 0x0000000002f3d309 clang::FrontendAction::Execute()
(/LLVM-trunk/bin/clang+++0x2f3d309)
#19 0x0000000002f00c42
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/LLVM-trunk/bin/clang+++0x2f00c42)
#20 0x0000000003002940
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/LLVM-trunk/bin/clang+++0x3002940)
#21 0x00000000008f5371 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/LLVM-trunk/bin/clang+++0x8f5371)
#22 0x00000000008f15b7 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&)
(/LLVM-trunk/bin/clang+++0x8f15b7)
#23 0x0000000002de1035 void llvm::function_ref<void
()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optional<llvm::StringRef>
>, std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >*, bool*) const::'lambda'()>(long)
(/LLVM-trunk/bin/clang+++0x2de1035)
#24 0x0000000002728ae2
llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>)
(/LLVM-trunk/bin/clang+++0x2728ae2)
#25 0x0000000002de1b15
clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optional<llvm::StringRef>
>, std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >*, bool*) const (.part.168)
(/LLVM-trunk/bin/clang+++0x2de1b15)
#26 0x0000000002dbe607
clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&,
clang::driver::Command const*&) const (/LLVM-trunk/bin/clang+++0x2dbe607)
#27 0x0000000002dbeee7
clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&,
llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&) const
(/LLVM-trunk/bin/clang+++0x2dbeee7)
#28 0x0000000002dc71a1
clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&,
llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&)
(/LLVM-trunk/bin/clang+++0x2dc71a1)
#29 0x000000000085b7c3 main (/LLVM-trunk/bin/clang+++0x85b7c3)
clang-11: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 11.0.0 (https://github.com/llvm/llvm-project.git
0863f6757953684400162f2ad418f3e8e28af278)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /LLVM-trunk/bin

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