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clang: assertion D.getASTContext().getLangOpts().CPlusPlus failed #48579

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llvmbot opened this issue Feb 18, 2021 · 6 comments
Closed

clang: assertion D.getASTContext().getLangOpts().CPlusPlus failed #48579

llvmbot opened this issue Feb 18, 2021 · 6 comments
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bugzilla Issues migrated from bugzilla c clang:frontend Language frontend issues, e.g. anything involving "Sema" confirmed Verified by a second party crash-on-invalid

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@llvmbot
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llvmbot commented Feb 18, 2021

Bugzilla Link 49235
Version trunk
OS Linux
Reporter LLVM Bugzilla Contributor
CC @zygoloid

Extended Description

It may be duplicated with #44103 .

$ cat test.c
int main() {
struct {
int x attribute((aligned(({ a(); }))));
} x;
}

$ ./clang -c test.c
test.c:3:41: warning: implicit declaration of function 'a' is invalid in C99 [-Wimplicit-function-declaration]
int x attribute((aligned(({ a(); }))));
^
clang: /home/xxx/data/git/llvm-project/clang/lib/AST/Decl.cpp:2052: bool isDeclExternC(const T &) [T = clang::FunctionDecl]: Assertion `D.getASTContext().getLangOpts().CPlusPlus' failed.
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: /data/xxx/git/llvm-project/build/bin/clang -c test.c

  1.  test.c:3:41: current parser token 'a'

  2.  test.c:1:12: parsing function body 'main'

  3.  test.c:1:12: in compound statement ('{}')

  4.  test.c:2:5: parsing struct/union body ''

  5.  test.c:3:39: in compound statement ('{}')

#​0 0x0000000006e97306 llvm::sys::PrintStackTrace(llvm::raw_ostream&) /home/xxx/data/git/llvm-project/llvm/lib/Support/Unix/Signals.inc:560:7
#​1 0x0000000006e9266e llvm::sys::RunSignalHandlers() /home/xxx/data/git/llvm-project/llvm/lib/Support/Signals.cpp:69:18
#​2 0x0000000006e95560 llvm::sys::CleanupOnSignal(unsigned long) /home/xxx/data/git/llvm-project/llvm/lib/Support/Unix/Signals.inc:361:3
#​3 0x0000000006c878a5 (anonymous namespace)::CrashRecoveryContextImpl::HandleCrash(int, unsigned long) /home/xxx/data/git/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:77:5
#​4 0x0000000006c87d20 CrashRecoverySignalHandler(int) /home/xxx/data/git/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:383:1
#​5 0x00007f9ac4c598a0 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x128a0)
#​6 0x00007f9ac391ff47 gsignal /build/glibc-2ORdQG/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#​7 0x00007f9ac39218b1 abort /build/glibc-2ORdQG/glibc-2.27/stdlib/abort.c:81:0
#​8 0x00007f9ac391142a __assert_fail_base /build/glibc-2ORdQG/glibc-2.27/assert/assert.c:89:0
#​9 0x00007f9ac39114a2 (/lib/x86_64-linux-gnu/libc.so.6+0x304a2)
#​10 0x000000000f31cab6 /home/xxx/data/git/llvm-project/clang/lib/AST/Decl.cpp:2052:5
#​11 0x000000000cee82c2 bool isIncompleteDeclExternCclang::FunctionDecl(clang::Sema&, clang::FunctionDecl const*) /home/xxx/data/git/llvm-project/clang/lib/Sema/SemaDecl.cpp:6602:13
#​12 0x000000000cebca55 clang::Sema::ActOnFunctionDeclarator(clang::Scope*, clang::Declarator&, clang::DeclContext*, clang::TypeSourceInfo*, clang::LookupResult&, llvm::MutableArrayRefclang::TemplateParameterList*, bool&) /home/xxx/data/git/llvm-project/clang/lib/Sema/SemaDecl.cpp:9700:7
#​13 0x000000000ceaca94 clang::Sema::HandleDeclarator(clang::Scope*, clang::Declarator&, llvm::MutableArrayRefclang::TemplateParameterList*) /home/xxx/data/git/llvm-project/clang/lib/Sema/SemaDecl.cpp:5868:11
#​14 0x000000000ceaa141 clang::Sema::ActOnDeclarator(clang::Scope*, clang::Declarator&) /home/xxx/data/git/llvm-project/clang/lib/Sema/SemaDecl.cpp:5544:15
#​15 0x000000000ce69606 clang::Sema::ImplicitlyDefineFunction(clang::SourceLocation, clang::IdentifierInfo&, clang::Scope*) /home/xxx/data/git/llvm-project/clang/lib/Sema/SemaDecl.cpp:14661:41
#​16 0x000000000ce64a09 clang::Sema::ClassifyName(clang::Scope*, clang::CXXScopeSpec&, clang::IdentifierInfo*&, clang::SourceLocation, clang::Token const&, clang::CorrectionCandidateCallback*) /home/xxx/data/git/llvm-project/clang/lib/Sema/SemaDecl.cpp:929:26
#​17 0x000000000c8369ed clang::Parser::TryAnnotateName(clang::CorrectionCandidateCallback*) /home/xxx/data/git/llvm-project/clang/lib/Parse/Parser.cpp:1627:53
#​18 0x000000000ca0874b clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::Parser::ParsedAttributesWithRange&) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:191:11
#​19 0x000000000ca081a6 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:106:20
#​20 0x000000000ca1c77e clang::Parser::ParseCompoundStatementBody(bool) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:1089:11
#​21 0x000000000ca1a464 clang::Parser::ParseScope::~ParseScope() /home/xxx/data/git/llvm-project/clang/include/clang/Parse/Parser.h:0:0
#​22 0x000000000ca1a464 clang::Parser::ParseCompoundStatement(bool, unsigned int) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:904:0
#​23 0x000000000c91556d clang::Parser::ParseParenExpression(clang::Parser::ParenParseOption&, bool, bool, clang::OpaquePtrclang::QualType&, clang::SourceLocation&) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseExpr.cpp:2872:16
#​24 0x000000000c90fc2e clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseExpr.cpp:957:11
#​25 0x000000000c902c60 clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, clang::Parser::TypeCastState, bool, bool*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseExpr.cpp:681:20
#​26 0x000000000c8fe5ef clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseExpr.cpp:176:10
#​27 0x000000000c8627aa _ZN4llvm12function_refIFN5clang12ActionResultIPNS1_4ExprELb1EEES4_EEC2IZNS1_4Sema25CorrectDelayedTyposInExprES5_PNS1_7VarDeclEbS7_Ed_UlS4_E_EEOT_PNSt9enable_ifIXntsr3std7is_sameINSt9remove_cvINSt16remove_referenceISD_E4typeEE4typeES7_EE5valueEvE4typeE /home/xxx/data/git/llvm-project/llvm/include/llvm/ADT/STLExtras.h:0:0
#​28 0x000000000c8627aa clang::Parser::ParseAttributeArgsCommon(clang::IdentifierInfo*, clang::SourceLocation, clang::ParsedAttributes&, clang::SourceLocation*, clang::IdentifierInfo*, clang::SourceLocation, clang::AttributeCommonInfo::Syntax) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:397:0
#​29 0x000000000c86049b clang::Parser::ParseGNUAttributeArgs(clang::IdentifierInfo*, clang::SourceLocation, clang::ParsedAttributes&, clang::SourceLocation*, clang::IdentifierInfo*, clang::SourceLocation, clang::AttributeCommonInfo::Syntax, clang::Declarator*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:480:3
#​30 0x000000000c85ed4a clang::Parser::ParseGNUAttributes(clang::ParsedAttributes&, clang::SourceLocation*, clang::Parser::LateParsedAttrList*, clang::Declarator*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:189:9
#​31 0x000000000c84163e clang::Parser::MaybeParseGNUAttributes(clang::Declarator&, clang::Parser::LateParsedAttrList*) /home/xxx/data/git/llvm-project/clang/include/clang/Parse/Parser.h:2650:31
#​32 0x000000000c89229a llvm::function_ref<void (clang::ParsingFieldDeclarator&)>::operator()(clang::ParsingFieldDeclarator&) const /home/xxx/data/git/llvm-project/llvm/include/llvm/ADT/STLExtras.h:0:0
#​33 0x000000000c89229a clang::Parser::ParseStructDeclaration(clang::ParsingDeclSpec&, llvm::function_ref<void (clang::ParsingFieldDeclarator&)>) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:4088:0
#​34 0x000000000c89354a clang::ParsingDeclSpec::~ParsingDeclSpec() /home/xxx/data/git/llvm-project/clang/include/clang/Parse/RAIIObjectsForParser.h:0:0
#​35 0x000000000c89354a clang::Parser::ParseStructUnionBody(clang::SourceLocation, clang::TypeSpecifierType, clang::RecordDecl*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:4179:0
#​36 0x000000000c8d1a67 clang::Parser::ParseClassSpecifier(clang::tok::TokenKind, clang::SourceLocation, clang::DeclSpec&, clang::Parser::ParsedTemplateInfo const&, clang::AccessSpecifier, bool, clang::Parser::DeclSpecContext, clang::Parser::ParsedAttributesWithRange&) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDeclCXX.cpp:1969:20
#​37 0x000000000c8744f9 clang::ParsedAttributesView::empty() const /home/xxx/data/git/llvm-project/clang/include/clang/Sema/ParsedAttr.h:0:0
#​38 0x000000000c8744f9 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&, clang::Parser::ParsedTemplateInfo const&, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:3839:0
#​39 0x000000000c8735e7 clang::Parser::ParseSimpleDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::Parser::ParsedAttributesWithRange&, bool, clang::Parser::ForRangeInit*, clang::SourceLocation*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:1675:10
#​40 0x000000000c873179 clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::Parser::ParsedAttributesWithRange&, clang::SourceLocation*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:0:12
#​41 0x000000000ca08d41 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::Parser::ParsedAttributesWithRange&) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:0:13
#​42 0x000000000ca081a6 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:106:20
#​43 0x000000000ca1c77e clang::Parser::ParseCompoundStatementBody(bool) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:1089:11
#​44 0x000000000ca1f748 clang::ActionResult<clang::Stmt*, true>::isInvalid() const /home/xxx/data/git/llvm-project/clang/include/clang/Sema/Ownership.h:0:0
#​45 0x000000000ca1f748 clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:2240:0
#​46 0x000000000c833117 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) /home/xxx/data/git/llvm-project/clang/lib/Parse/Parser.cpp:1339:10
#​47 0x000000000c88224e clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::SourceLocation*, clang::Parser::ForRangeInit*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:1926:18
#​48 0x000000000c83020d clang::Parser::ParseDeclOrFunctionDefInternal(clang::Parser::ParsedAttributesWithRange&, clang::ParsingDeclSpec&, clang::AccessSpecifier) /home/xxx/data/git/llvm-project/clang/lib/Parse/Parser.cpp:0:10
#​49 0x000000000c82e939 clang::Parser::ObjCDeclContextSwitch::~ObjCDeclContextSwitch() /home/xxx/data/git/llvm-project/clang/include/clang/Parse/Parser.h:0:0
#​50 0x000000000c82e939 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::Parser::ParsedAttributesWithRange&, clang::ParsingDeclSpec*, clang::AccessSpecifier) /home/xxx/data/git/llvm-project/clang/lib/Parse/Parser.cpp:1116:0
#​51 0x000000000c82c6a1 clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&, clang::ParsingDeclSpec*) /home/xxx/data/git/llvm-project/clang/lib/Parse/Parser.cpp:935:12
#​52 0x000000000c827ecc clang::Parser::ParseTopLevelDecl(clang::OpaquePtrclang::DeclGroupRef&, bool) /home/xxx/data/git/llvm-project/clang/lib/Parse/Parser.cpp:683:10
#​53 0x000000000c826ccc clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtrclang::DeclGroupRef&) /home/xxx/data/git/llvm-project/clang/lib/Parse/Parser.cpp:555:26
#​54 0x000000000c81cf4a clang::ParseAST(clang::Sema&, bool, bool) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseAST.cpp:157:15
#​55 0x000000000861c2a2 clang::ASTFrontendAction::ExecuteAction() /home/xxx/data/git/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1059:1
#​56 0x00000000099decd8 clang::CodeGenAction::ExecuteAction() /home/xxx/data/git/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:1184:28
#​57 0x000000000861a51a clang::FrontendAction::Execute() /home/xxx/data/git/llvm-project/clang/lib/Frontend/FrontendAction.cpp:954:10
#​58 0x000000000854eaa7 llvm::Error::operator bool() /home/xxx/data/git/llvm-project/llvm/include/llvm/Support/Error.h:0:0
#​59 0x000000000854eaa7 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/xxx/data/git/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:984:0
#​60 0x00000000088f183f clang::CompilerInstance::getFrontendOpts() /home/xxx/data/git/llvm-project/clang/include/clang/Frontend/CompilerInstance.h:0:0
#​61 0x00000000088f183f clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/xxx/data/git/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:279:0
#​62 0x0000000000b094cc llvm::TimeTraceScope::~TimeTraceScope() /home/xxx/data/git/llvm-project/llvm/include/llvm/Support/TimeProfiler.h:0:0
#​63 0x0000000000b094cc cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/xxx/data/git/llvm-project/clang/tools/driver/cc1_main.cpp:241:0
#​64 0x0000000000afaf3b ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&) /home/xxx/data/git/llvm-project/clang/tools/driver/driver.cpp:330:12
#​65 0x00000000082c1350 clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optionalllvm::StringRef >, std::__cxx11::basic_string<char, std::char_traits, std::allocator >, bool) const::$_1::operator()() const /home/xxx/data/git/llvm-project/clang/lib/Driver/Job.cpp:400:30
#​66 0x00000000082c1350 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optionalllvm::StringRef >, std::__cxx11::basic_string<char, std::char_traits, std::allocator >, bool) const::$_1>(long) /home/xxx/data/git/llvm-project/llvm/include/llvm/ADT/STLExtras.h:185:0
#​67 0x0000000006c8767d llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) /home/xxx/data/git/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:420:1
#​68 0x00000000082bfbe7 clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optionalllvm::StringRef >, std::__cxx11::basic_string<char, std::char_traits, std::allocator >, bool) const /home/xxx/data/git/llvm-project/clang/lib/Driver/Job.cpp:400:12
#​69 0x000000000822acca std::__cxx11::basic_string<char, std::char_traits, std::allocator >::empty() const /usr/bin/../lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/c++/7.5.0/bits/basic_string.h:0:0
#​70 0x000000000822acca clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&) const /home/xxx/data/git/llvm-project/clang/lib/Driver/Compilation.cpp:196:0
#​71 0x000000000822b754 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&) const /home/xxx/data/git/llvm-project/clang/lib/Driver/Compilation.cpp:246:19
#​72 0x0000000008266f77 llvm::SmallVectorBase::empty() const /home/xxx/data/git/llvm-project/llvm/include/llvm/ADT/SmallVector.h:0:0
#​73 0x0000000008266f77 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&) /home/xxx/data/git/llvm-project/clang/lib/Driver/Driver.cpp:1509:0
#​74 0x0000000000af95ae main /home/xxx/data/git/llvm-project/clang/tools/driver/driver.cpp:502:21
#​75 0x00007f9ac3902b97 __libc_start_main /build/glibc-2ORdQG/glibc-2.27/csu/../csu/libc-start.c:344:0
#​76 0x0000000000af38ea _start (/data/xxx/git/llvm-project/build/bin/clang+0xaf38ea)
clang-11: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 11.1.0 (https://github.com/llvm/llvm-project.git 1fdec59)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /data/xxx/git/llvm-project/build/bin
clang-11: note: diagnostic msg:

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-11: note: diagnostic msg: /tmp/test-397fa0.c
clang-11: note: diagnostic msg: /tmp/test-397fa0.sh
clang-11: note: diagnostic msg:
@llvmbot
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llvmbot commented Feb 18, 2021

Also affects trunk.

@llvmbot
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llvmbot commented Feb 18, 2021

Assertion fails on trunk as well.

poc.c:3:41: warning: implicit declaration of function 'a' is invalid in C99 [-Wimplicit-function-declaration]
int x attribute((aligned(({ a(); }))));
^
clang: /data/xxx/git/llvm-project/clang/lib/AST/Decl.cpp:2077: bool isDeclExternC(const T &) [T = clang::FunctionDecl]: Assertion `D.getASTContext().getLangOpts().CPlusPlus' failed.
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: /data/xxx/git/llvm-project/build_12/bin/clang -x c -c poc.c

  1.  poc.c:3:41: current parser token 'a'

  2.  poc.c:1:12: parsing function body 'main'

  3.  poc.c:1:12: in compound statement ('{}')

  4.  poc.c:2:5: parsing struct/union body ''

  5.  poc.c:3:39: in compound statement ('{}')

#​0 0x0000000000d89891 __interceptor_backtrace.part.117 (/data/xxx/git/llvm-project/build_12/bin/clang+0xd89891)
#​1 0x000000000d59d8da llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /data/xxx/git/llvm-project/llvm/lib/Support/Unix/Signals.inc:561:7
#​2 0x000000000d594061 llvm::sys::RunSignalHandlers() /data/xxx/git/llvm-project/llvm/lib/Support/Signals.cpp:72:18
#​3 0x000000000d59a4ff llvm::sys::CleanupOnSignal(unsigned long) /data/xxx/git/llvm-project/llvm/lib/Support/Unix/Signals.inc:0:3
#​4 0x000000000d2b2385 (anonymous namespace)::CrashRecoveryContextImpl::HandleCrash(int, unsigned long) /data/xxx/git/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:75:5
#​5 0x000000000d2b2e4c CrashRecoverySignalHandler(int) /data/xxx/git/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:389:1
#​6 0x00007fc41c8cd8a0 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x128a0)
#​7 0x00007fc41c2f0f47 raise /build/glibc-2ORdQG/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#​8 0x00007fc41c2f28b1 abort /build/glibc-2ORdQG/glibc-2.27/stdlib/abort.c:81:0
#​9 0x00007fc41c2e242a __assert_fail_base /build/glibc-2ORdQG/glibc-2.27/assert/assert.c:89:0
#​10 0x00007fc41c2e24a2 (/lib/x86_64-linux-gnu/libc.so.6+0x304a2)
#​11 0x000000001d00df7e /data/xxx/git/llvm-project/clang/lib/AST/Decl.cpp:2077:5
#​12 0x0000000018ba57b5 bool isIncompleteDeclExternCclang::FunctionDecl(clang::Sema&, clang::FunctionDecl const*) /data/xxx/git/llvm-project/clang/lib/Sema/SemaDecl.cpp:6653:13
#​13 0x0000000018b55bd5 clang::Sema::ActOnFunctionDeclarator(clang::Scope*, clang::Declarator&, clang::DeclContext*, clang::TypeSourceInfo*, clang::LookupResult&, llvm::MutableArrayRefclang::TemplateParameterList*, bool&) /data/xxx/git/llvm-project/clang/lib/Sema/SemaDecl.cpp:9773:7
#​14 0x0000000018b3c18c clang::Sema::HandleDeclarator(clang::Scope*, clang::Declarator&, llvm::MutableArrayRefclang::TemplateParameterList*) /data/xxx/git/llvm-project/clang/lib/Sema/SemaDecl.cpp:5880:11
#​15 0x0000000018b376db clang::Sema::ActOnDeclarator(clang::Scope*, clang::Declarator&) /data/xxx/git/llvm-project/clang/lib/Sema/SemaDecl.cpp:5556:15
#​16 0x0000000018ac688c clang::Sema::ImplicitlyDefineFunction(clang::SourceLocation, clang::IdentifierInfo&, clang::Scope*) /data/xxx/git/llvm-project/clang/lib/Sema/SemaDecl.cpp:14782:41
#​17 0x0000000018abe297 clang::Sema::ClassifyName(clang::Scope*, clang::CXXScopeSpec&, clang::IdentifierInfo*&, clang::SourceLocation, clang::Token const&, clang::CorrectionCandidateCallback*) /data/xxx/git/llvm-project/clang/lib/Sema/SemaDecl.cpp:927:26
#​18 0x0000000017f7d855 clang::Parser::TryAnnotateName(clang::CorrectionCandidateCallback*) /data/xxx/git/llvm-project/clang/lib/Parse/Parser.cpp:1662:53
#​19 0x0000000018293350 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::Parser::ParsedAttributesWithRange&) /data/xxx/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:191:11
#​20 0x000000001829089a clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) /data/xxx/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:106:20
#​21 0x00000000182af9e5 clang::Parser::ParseCompoundStatementBody(bool) /data/xxx/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:1099:11
#​22 0x00000000182ac433 clang::Parser::ParseScope::~ParseScope() /data/xxx/git/llvm-project/clang/include/clang/Parse/Parser.h:0:0
#​23 0x00000000182ac433 clang::Parser::ParseCompoundStatement(bool, unsigned int) /data/xxx/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:910:0
#​24 0x00000000180ed4ef clang::Parser::ParseParenExpression(clang::Parser::ParenParseOption&, bool, bool, clang::OpaquePtrclang::QualType&, clang::SourceLocation&) /data/xxx/git/llvm-project/clang/lib/Parse/ParseExpr.cpp:2827:23
#​25 0x00000000180e5742 clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) /data/xxx/git/llvm-project/clang/lib/Parse/ParseExpr.cpp:957:11
#​26 0x00000000180c5564 clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, clang::Parser::TypeCastState, bool, bool*) /data/xxx/git/llvm-project/clang/lib/Parse/ParseExpr.cpp:681:20
#​27 0x00000000180c5564 clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState) /data/xxx/git/llvm-project/clang/lib/Parse/ParseExpr.cpp:173:0
#​28 0x0000000017fc7be6 clang::Parser::ParseAttributeArgsCommon(clang::IdentifierInfo*, clang::SourceLocation, clang::ParsedAttributes&, clang::SourceLocation*, clang::IdentifierInfo*, clang::SourceLocation, clang::AttributeCommonInfo::Syntax) /data/xxx/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:398:47
#​29 0x0000000017fc48b5 clang::Parser::ParseGNUAttributeArgs(clang::IdentifierInfo*, clang::SourceLocation, clang::ParsedAttributes&, clang::SourceLocation*, clang::IdentifierInfo*, clang::SourceLocation, clang::AttributeCommonInfo::Syntax, clang::Declarator*) /data/xxx/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:485:3
#​30 0x0000000017fc1e73 clang::Parser::ParseGNUAttributes(clang::ParsedAttributes&, clang::SourceLocation*, clang::Parser::LateParsedAttrList*, clang::Declarator*) /data/xxx/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:190:9
#​31 0x0000000017f913c3 clang::Parser::MaybeParseGNUAttributes(clang::Declarator&, clang::Parser::LateParsedAttrList*) /data/xxx/git/llvm-project/clang/include/clang/Parse/Parser.h:2665:31
#​32 0x000000001801341e llvm::function_ref<void (clang::ParsingFieldDeclarator&)>::operator()(clang::ParsingFieldDeclarator&) const /data/xxx/git/llvm-project/llvm/include/llvm/ADT/STLExtras.h:0:0
#​33 0x000000001801341e clang::Parser::ParseStructDeclaration(clang::ParsingDeclSpec&, llvm::function_ref<void (clang::ParsingFieldDeclarator&)>) /data/xxx/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:4173:0
#​34 0x000000001801575f clang::ParsingDeclSpec::~ParsingDeclSpec() /data/xxx/git/llvm-project/clang/include/clang/Parse/RAIIObjectsForParser.h:0:0
#​35 0x000000001801575f clang::Parser::ParseStructUnionBody(clang::SourceLocation, clang::TypeSpecifierType, clang::RecordDecl*) /data/xxx/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:4264:0
#​36 0x000000001807c2cb clang::Parser::ParseClassSpecifier(clang::tok::TokenKind, clang::SourceLocation, clang::DeclSpec&, clang::Parser::ParsedTemplateInfo const&, clang::AccessSpecifier, bool, clang::Parser::DeclSpecContext, clang::Parser::ParsedAttributesWithRange&) /data/xxx/git/llvm-project/clang/lib/Parse/ParseDeclCXX.cpp:1976:20
#​37 0x0000000017fe2f27 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&, clang::Parser::ParsedTemplateInfo const&, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*) /data/xxx/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:3914:7
#​38 0x0000000017fe0e49 clang::Parser::ParseSimpleDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::Parser::ParsedAttributesWithRange&, bool, clang::Parser::ForRangeInit*, clang::SourceLocation*) /data/xxx/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:1725:3
#​39 0x0000000017fe043f clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::Parser::ParsedAttributesWithRange&, clang::SourceLocation*) /data/xxx/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:1687:12
#​40 0x0000000018293d42 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::Parser::ParsedAttributesWithRange&) /data/xxx/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:0:16
#​41 0x000000001829089a clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) /data/xxx/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:106:20
#​42 0x00000000182af9e5 clang::Parser::ParseCompoundStatementBody(bool) /data/xxx/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:1099:11
#​43 0x00000000182b580f clang::ActionResult<clang::Stmt*, true>::isInvalid() const /data/xxx/git/llvm-project/clang/include/clang/Sema/Ownership.h:0:0
#​44 0x00000000182b580f clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) /data/xxx/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:2263:0
#​45 0x0000000017f77add clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) /data/xxx/git/llvm-project/clang/lib/Parse/Parser.cpp:0:10
#​46 0x0000000017ff6aa0 clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::SourceLocation*, clang::Parser::ForRangeInit*) /data/xxx/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:1976:27
#​47 0x0000000017f737b2 clang::Parser::ParseDeclOrFunctionDefInternal(clang::Parser::ParsedAttributesWithRange&, clang::ParsingDeclSpec&, clang::AccessSpecifier) /data/xxx/git/llvm-project/clang/lib/Parse/Parser.cpp:1134:10
#​48 0x0000000017f705d7 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::Parser::ParsedAttributesWithRange&, clang::ParsingDeclSpec*, clang::AccessSpecifier) /data/xxx/git/llvm-project/clang/lib/Parse/Parser.cpp:1150:12
#​49 0x0000000017f6d3ad clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&, clang::ParsingDeclSpec*) /data/xxx/git/llvm-project/clang/lib/Parse/Parser.cpp:0:12
#​50 0x0000000017f662ee clang::Parser::ParseTopLevelDecl(clang::OpaquePtrclang::DeclGroupRef&, bool) /data/xxx/git/llvm-project/clang/lib/Parse/Parser.cpp:716:10
#​51 0x0000000017f647c8 clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtrclang::DeclGroupRef&) /data/xxx/git/llvm-project/clang/lib/Parse/Parser.cpp:588:26
#​52 0x0000000017f529ab clang::ParseAST(clang::Sema&, bool, bool) /data/xxx/git/llvm-project/clang/lib/Parse/ParseAST.cpp:157:25
#​53 0x00000000102ed733 clang::ASTFrontendAction::ExecuteAction() /data/xxx/git/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1058:1
#​54 0x00000000129dd448 clang::CodeGenAction::ExecuteAction() /data/xxx/git/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:1082:30
#​55 0x00000000102ea56d clang::FrontendAction::Execute() /data/xxx/git/llvm-project/clang/lib/Frontend/FrontendAction.cpp:0:8
#​56 0x00000000100f5a87 llvm::Error::operator bool() /data/xxx/git/llvm-project/llvm/include/llvm/Support/Error.h:0:0
#​57 0x00000000100f5a87 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /data/xxx/git/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:949:0
#​58 0x00000000107e829e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /data/xxx/git/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:278:25
#​59 0x0000000000e277af cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /data/xxx/git/llvm-project/clang/tools/driver/cc1_main.cpp:240:15
#​60 0x0000000000e0f567 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&) /data/xxx/git/llvm-project/clang/tools/driver/driver.cpp:330:12
#​61 0x000000000fc7c44d clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optionalllvm::StringRef >, std::__cxx11::basic_string<char, std::char_traits, std::allocator >, bool) const::$_1::operator()() const /data/xxx/git/llvm-project/clang/lib/Driver/Job.cpp:404:30
#​62 0x000000000fc7c44d void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optionalllvm::StringRef >, std::__cxx11::basic_string<char, std::char_traits, std::allocator >, bool) const::$_1>(long) /data/xxx/git/llvm-project/llvm/include/llvm/ADT/STLExtras.h:185:0
#​63 0x000000000d2b1f24 llvm::function_ref<void ()>::operator()() const /data/xxx/git/llvm-project/llvm/include/llvm/ADT/STLExtras.h:209:12
#​64 0x000000000d2b1f24 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) /data/xxx/git/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:424:0
#​65 0x000000000fc79da2 clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optionalllvm::StringRef >, std::__cxx11::basic_string<char, std::char_traits, std::allocator >, bool) const /data/xxx/git/llvm-project/clang/lib/Driver/Job.cpp:404:7
#​66 0x000000000fb7111e clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&) const /data/xxx/git/llvm-project/clang/lib/Driver/Compilation.cpp:195:15
#​67 0x000000000fb71d6c clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&) const /data/xxx/git/llvm-project/clang/lib/Driver/Compilation.cpp:248:19
#​68 0x000000000fbd4e2a llvm::SmallVectorBase::empty() const /data/xxx/git/llvm-project/llvm/include/llvm/ADT/SmallVector.h:0:0
#​69 0x000000000fbd4e2a clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&) /data/xxx/git/llvm-project/clang/lib/Driver/Driver.cpp:1517:0
#​70 0x0000000000e0c4af main /data/xxx/git/llvm-project/clang/tools/driver/driver.cpp:502:21
#​71 0x00007fc41c2d3b97 __libc_start_main /build/glibc-2ORdQG/glibc-2.27/csu/../csu/libc-start.c:344:0
#​72 0x0000000000d072ca _start (/data/xxx/git/llvm-project/build_12/bin/clang+0xd072ca)
clang-12: error: clang frontend command failed with exit code 134 (use -v to see invocation)
clang version 12.0.0 (https://github.com/llvm/llvm-project.git b46924e)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /data/xxx/git/llvm-project/build_12/bin
clang-12: note: diagnostic msg:

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-12: note: diagnostic msg: /tmp/poc-edc185.c
clang-12: note: diagnostic msg: /tmp/poc-edc185.sh
clang-12: note: diagnostic msg:

@llvmbot
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llvmbot commented Feb 18, 2021

Sorry, I made a mistake of attaching the output of 12.0, instead of trunk. Following is the one of trunk.

test.c:3:41: warning: implicit declaration of function 'a' is invalid in C99 [-Wimplicit-function-declaration]
int x attribute((aligned(({ a(); }))));
^
clang: /home/xxx/data/git/llvm-project/clang/lib/AST/Decl.cpp:2077: bool isDeclExternC(const T &) [T = clang::FunctionDecl]: Assertion `D.getASTContext().getLangOpts().CPlusPlus' failed.
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: /data/xxx/git/llvm-project/build_trunk/bin/clang -x c -c test.c

  1.  test.c:3:41: current parser token 'a'

  2.  test.c:1:12: parsing function body 'main'

  3.  test.c:1:12: in compound statement ('{}')

  4.  test.c:2:5: parsing struct/union body ''

  5.  test.c:3:39: in compound statement ('{}')

#​0 0x0000000000dfd0a1 __interceptor_backtrace.part.117 asan_interceptors.cc.o:0:0
#​1 0x000000000d7fb43a llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/xxx/data/git/llvm-project/llvm/lib/Support/Unix/Signals.inc:561:7
#​2 0x000000000d7f1bc1 llvm::sys::RunSignalHandlers() /home/xxx/data/git/llvm-project/llvm/lib/Support/Signals.cpp:72:18
#​3 0x000000000d7f805f llvm::sys::CleanupOnSignal(unsigned long) /home/xxx/data/git/llvm-project/llvm/lib/Support/Unix/Signals.inc:0:3
#​4 0x000000000d504245 (anonymous namespace)::CrashRecoveryContextImpl::HandleCrash(int, unsigned long) /home/xxx/data/git/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:75:5
#​5 0x000000000d504d0c CrashRecoverySignalHandler(int) /home/xxx/data/git/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:389:1
#​6 0x00007f35f0f918a0 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x128a0)
#​7 0x00007f35f09b4f47 raise /build/glibc-2ORdQG/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#​8 0x00007f35f09b68b1 abort /build/glibc-2ORdQG/glibc-2.27/stdlib/abort.c:81:0
#​9 0x00007f35f09a642a __assert_fail_base /build/glibc-2ORdQG/glibc-2.27/assert/assert.c:89:0
#​10 0x00007f35f09a64a2 (/lib/x86_64-linux-gnu/libc.so.6+0x304a2)
#​11 0x000000001d479b3e /home/xxx/data/git/llvm-project/clang/lib/AST/Decl.cpp:2077:5
#​12 0x0000000018f645b5 bool isIncompleteDeclExternCclang::FunctionDecl(clang::Sema&, clang::FunctionDecl const*) /home/xxx/data/git/llvm-project/clang/lib/Sema/SemaDecl.cpp:6651:13
#​13 0x0000000018f1470f clang::Sema::ActOnFunctionDeclarator(clang::Scope*, clang::Declarator&, clang::DeclContext*, clang::TypeSourceInfo*, clang::LookupResult&, llvm::MutableArrayRefclang::TemplateParameterList*, bool&) /home/xxx/data/git/llvm-project/clang/lib/Sema/SemaDecl.cpp:9777:7
#​14 0x0000000018efab1c clang::Sema::HandleDeclarator(clang::Scope*, clang::Declarator&, llvm::MutableArrayRefclang::TemplateParameterList*) /home/xxx/data/git/llvm-project/clang/lib/Sema/SemaDecl.cpp:5878:11
#​15 0x0000000018ef606b clang::Sema::ActOnDeclarator(clang::Scope*, clang::Declarator&) /home/xxx/data/git/llvm-project/clang/lib/Sema/SemaDecl.cpp:5554:15
#​16 0x0000000018e85409 clang::Sema::ImplicitlyDefineFunction(clang::SourceLocation, clang::IdentifierInfo&, clang::Scope*) /home/xxx/data/git/llvm-project/clang/lib/Sema/SemaDecl.cpp:14786:41
#​17 0x0000000018e7ce27 clang::Sema::ClassifyName(clang::Scope*, clang::CXXScopeSpec&, clang::IdentifierInfo*&, clang::SourceLocation, clang::Token const&, clang::CorrectionCandidateCallback*) /home/xxx/data/git/llvm-project/clang/lib/Sema/SemaDecl.cpp:927:26
#​18 0x000000001832f4b5 clang::Parser::TryAnnotateName(clang::CorrectionCandidateCallback*) /home/xxx/data/git/llvm-project/clang/lib/Parse/Parser.cpp:1662:53
#​19 0x00000000186466ae clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::Parser::ParsedAttributesWithRange&) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:198:11
#​20 0x0000000018643e2a clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:115:3
#​21 0x0000000018663e85 clang::Parser::ParseCompoundStatementBody(bool) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:1110:11
#​22 0x00000000186608d3 clang::Parser::ParseScope::~ParseScope() /home/xxx/data/git/llvm-project/clang/include/clang/Parse/Parser.h:0:0
#​23 0x00000000186608d3 clang::Parser::ParseCompoundStatement(bool, unsigned int) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:921:0
#​24 0x000000001849f7ff clang::Parser::ParseParenExpression(clang::Parser::ParenParseOption&, bool, bool, clang::OpaquePtrclang::QualType&, clang::SourceLocation&) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseExpr.cpp:2827:23
#​25 0x0000000018497a4c clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseExpr.cpp:957:11
#​26 0x0000000018477884 clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, clang::Parser::TypeCastState, bool, bool*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseExpr.cpp:681:20
#​27 0x0000000018477884 clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseExpr.cpp:173:0
#​28 0x0000000018379c06 clang::Parser::ParseAttributeArgsCommon(clang::IdentifierInfo*, clang::SourceLocation, clang::ParsedAttributes&, clang::SourceLocation*, clang::IdentifierInfo*, clang::SourceLocation, clang::AttributeCommonInfo::Syntax) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:416:47
#​29 0x0000000018376898 clang::Parser::ParseGNUAttributeArgs(clang::IdentifierInfo*, clang::SourceLocation, clang::ParsedAttributes&, clang::SourceLocation*, clang::IdentifierInfo*, clang::SourceLocation, clang::AttributeCommonInfo::Syntax, clang::Declarator*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:503:3
#​30 0x0000000018373e53 clang::Parser::ParseGNUAttributes(clang::ParsedAttributes&, clang::SourceLocation*, clang::Parser::LateParsedAttrList*, clang::Declarator*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:208:9
#​31 0x0000000018343073 clang::Parser::MaybeParseGNUAttributes(clang::Declarator&, clang::Parser::LateParsedAttrList*) /home/xxx/data/git/llvm-project/clang/include/clang/Parse/Parser.h:2723:31
#​32 0x00000000183c4fde llvm::function_ref<void (clang::ParsingFieldDeclarator&)>::operator()(clang::ParsingFieldDeclarator&) const /home/xxx/data/git/llvm-project/llvm/include/llvm/ADT/STLExtras.h:0:0
#​33 0x00000000183c4fde clang::Parser::ParseStructDeclaration(clang::ParsingDeclSpec&, llvm::function_ref<void (clang::ParsingFieldDeclarator&)>) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:4187:0
#​34 0x00000000183c7322 clang::ParsingDeclSpec::~ParsingDeclSpec() /home/xxx/data/git/llvm-project/clang/include/clang/Parse/RAIIObjectsForParser.h:0:0
#​35 0x00000000183c7322 clang::Parser::ParseStructUnionBody(clang::SourceLocation, clang::TypeSpecifierType, clang::RecordDecl*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:4278:0
#​36 0x000000001842e535 clang::Parser::ParseClassSpecifier(clang::tok::TokenKind, clang::SourceLocation, clang::DeclSpec&, clang::Parser::ParsedTemplateInfo const&, clang::AccessSpecifier, bool, clang::Parser::DeclSpecContext, clang::Parser::ParsedAttributesWithRange&) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDeclCXX.cpp:1972:20
#​37 0x0000000018394f87 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&, clang::Parser::ParsedTemplateInfo const&, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:3929:7
#​38 0x0000000018392eac clang::Parser::ParseSimpleDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::Parser::ParsedAttributesWithRange&, bool, clang::Parser::ForRangeInit*, clang::SourceLocation*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:1743:3
#​39 0x000000001839249f clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::Parser::ParsedAttributesWithRange&, clang::SourceLocation*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:1705:12
#​40 0x0000000018647fa8 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::Parser::ParsedAttributesWithRange&) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:0:16
#​41 0x0000000018643e2a clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:115:3
#​42 0x0000000018663e85 clang::Parser::ParseCompoundStatementBody(bool) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:1110:11
#​43 0x0000000018669c9f clang::ActionResult<clang::Stmt*, true>::isInvalid() const /home/xxx/data/git/llvm-project/clang/include/clang/Sema/Ownership.h:0:0
#​44 0x0000000018669c9f clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseStmt.cpp:2274:0
#​45 0x000000001832973d clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) /home/xxx/data/git/llvm-project/clang/lib/Parse/Parser.cpp:0:10
#​46 0x00000000183a8a06 clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::SourceLocation*, clang::Parser::ForRangeInit*) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseDecl.cpp:1994:27
#​47 0x0000000018325412 clang::Parser::ParseDeclOrFunctionDefInternal(clang::Parser::ParsedAttributesWithRange&, clang::ParsingDeclSpec&, clang::AccessSpecifier) /home/xxx/data/git/llvm-project/clang/lib/Parse/Parser.cpp:1134:10
#​48 0x0000000018322237 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::Parser::ParsedAttributesWithRange&, clang::ParsingDeclSpec*, clang::AccessSpecifier) /home/xxx/data/git/llvm-project/clang/lib/Parse/Parser.cpp:1150:12
#​49 0x000000001831f00d clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&, clang::ParsingDeclSpec*) /home/xxx/data/git/llvm-project/clang/lib/Parse/Parser.cpp:0:12
#​50 0x0000000018317f4e clang::Parser::ParseTopLevelDecl(clang::OpaquePtrclang::DeclGroupRef&, bool) /home/xxx/data/git/llvm-project/clang/lib/Parse/Parser.cpp:716:10
#​51 0x0000000018316428 clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtrclang::DeclGroupRef&) /home/xxx/data/git/llvm-project/clang/lib/Parse/Parser.cpp:588:26
#​52 0x000000001830460b clang::ParseAST(clang::Sema&, bool, bool) /home/xxx/data/git/llvm-project/clang/lib/Parse/ParseAST.cpp:157:25
#​53 0x00000000105c90c3 clang::ASTFrontendAction::ExecuteAction() /home/xxx/data/git/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1058:1
#​54 0x0000000012cff7d9 clang::CodeGenAction::ExecuteAction() /home/xxx/data/git/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:1082:30
#​55 0x00000000105c5efd clang::FrontendAction::Execute() /home/xxx/data/git/llvm-project/clang/lib/Frontend/FrontendAction.cpp:0:8
#​56 0x0000000010394e0a llvm::Error::operator bool() /home/xxx/data/git/llvm-project/llvm/include/llvm/Support/Error.h:0:0
#​57 0x0000000010394e0a clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/xxx/data/git/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:949:0
#​58 0x0000000010ac5a2e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/xxx/data/git/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:278:25
#​59 0x0000000000e9b85d cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/xxx/data/git/llvm-project/clang/tools/driver/cc1_main.cpp:246:15
#​60 0x0000000000e82e17 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&) /home/xxx/data/git/llvm-project/clang/tools/driver/driver.cpp:330:12
#​61 0x000000000ff0a39d clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optionalllvm::StringRef >, std::__cxx11::basic_string<char, std::char_traits, std::allocator >, bool) const::$_1::operator()() const /home/xxx/data/git/llvm-project/clang/lib/Driver/Job.cpp:404:30
#​62 0x000000000ff0a39d void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optionalllvm::StringRef >, std::__cxx11::basic_string<char, std::char_traits, std::allocator >, bool) const::$_1>(long) /home/xxx/data/git/llvm-project/llvm/include/llvm/ADT/STLExtras.h:185:0
#​63 0x000000000d503de4 llvm::function_ref<void ()>::operator()() const /home/xxx/data/git/llvm-project/llvm/include/llvm/ADT/STLExtras.h:209:12
#​64 0x000000000d503de4 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) /home/xxx/data/git/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:424:0
#​65 0x000000000ff08be2 clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optionalllvm::StringRef >, std::__cxx11::basic_string<char, std::char_traits, std::allocator >, bool) const /home/xxx/data/git/llvm-project/clang/lib/Driver/Job.cpp:404:7
#​66 0x000000000fdfc32e clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&) const /home/xxx/data/git/llvm-project/clang/lib/Driver/Compilation.cpp:195:15
#​67 0x000000000fdfcf7c clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&) const /home/xxx/data/git/llvm-project/clang/lib/Driver/Compilation.cpp:248:19
#​68 0x000000000fe6126a llvm::SmallVectorBase::empty() const /home/xxx/data/git/llvm-project/llvm/include/llvm/ADT/SmallVector.h:0:0
#​69 0x000000000fe6126a clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&) /home/xxx/data/git/llvm-project/clang/lib/Driver/Driver.cpp:1529:0
#​70 0x0000000000e7fd4f main /home/xxx/data/git/llvm-project/clang/tools/driver/driver.cpp:502:21
#​71 0x00007f35f0997b97 __libc_start_main /build/glibc-2ORdQG/glibc-2.27/csu/../csu/libc-start.c:344:0
#​72 0x0000000000d7aada _start (/data/xxx/git/llvm-project/build_trunk/bin/clang+0xd7aada)
clang-13: error: clang frontend command failed with exit code 134 (use -v to see invocation)
clang version 13.0.0 (https://github.com/llvm/llvm-project.git b006902)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /data/xxx/git/llvm-project/build_trunk/bin
clang-13: note: diagnostic msg:

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-13: note: diagnostic msg: /tmp/test-0b4587.c
clang-13: note: diagnostic msg: /tmp/test-0b4587.sh
clang-13: note: diagnostic msg:

@llvmbot llvmbot transferred this issue from llvm/llvm-bugzilla-archive Dec 11, 2021
@AaronBallman AaronBallman added c clang:frontend Language frontend issues, e.g. anything involving "Sema" crash-on-invalid confirmed Verified by a second party and removed clang Clang issues not falling into any other category labels Jun 22, 2023
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llvmbot commented Jun 22, 2023

@llvm/issue-subscribers-clang-frontend

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llvmbot commented Jun 22, 2023

@llvm/issue-subscribers-c

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The issue is still present as of Clang 16.0.0. It only occurs for C builds and it requires assertions to be enabled: https://gcc.godbolt.org/z/5sqPdoznb

Chenyang-L pushed a commit to intel/llvm that referenced this issue Jul 11, 2023
@AaronBallman @Chenyang-L
Fix a failing assertion with implicit function definitions
25b61bf 
When implicitly defining a function in C, we would try to find an
appropriate declaration context for the function to be declared within.
However, we did not account for GNU statement expressions, which
masquerade as a compound statement and can be used in other contexts
such as within structure member declarations.

Fixes llvm/llvm-project#48579
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