| Issue |
113855
|
| Summary |
[clang] Assertion `StructuredList->getNumInits() == 1 && "A union should never have more than one initializer!"' failed.
|
| Labels |
clang:frontend,
crash-on-invalid,
clang:frontend:fuzzer
|
| Assignees |
|
| Reporter |
yijan4845
|
**This testcase is generated by a fuzzer.**
Compiler Explorer: [https://godbolt.org/z/EWjanasPG](https://godbolt.org/z/EWjanasPG)
This code will crash on Clang Assertion Trunk:
```cpp
struct S {};
union U {
S x;
float y;
};
void f() {
new U{0,.y=1};
}
```
It seems that this goes back to clang-6. This is similar to [111845](https://github.com/llvm/llvm-project/issues/111845).
Stack dump:
```
clang++: /root/llvm-project/clang/lib/Sema/SemaInit.cpp:2933: bool {anonymous}::InitListChecker::CheckDesignatedInitializer(const clang::InitializedEntity&, clang::InitListExpr*, clang::DesignatedInitExpr*, unsigned int, clang::QualType&, clang::RecordDecl::field_iterator*, llvm::APSInt*, unsigned int&, clang::InitListExpr*, unsigned int&, bool, bool): Assertion `StructuredList->getNumInits() == 1 && "A union should never have more than one initializer!"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics <source>
1. <source>:9:17: current parser token ';'
2. <source>:8:10: parsing function body 'f'
3. <source>:8:10: in compound statement ('{}')
#0 0x0000000003bd52c8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3bd52c8)
#1 0x0000000003bd2fcc llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3bd2fcc)
#2 0x0000000003b209a8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x000078d632242520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x000078d6322969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x000078d632242476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x000078d6322287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x000078d63222871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#8 0x000078d632239e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#9 0x0000000006f0701d (anonymous namespace)::InitListChecker::CheckDesignatedInitializer(clang::InitializedEntity const&, clang::InitListExpr*, clang::DesignatedInitExpr*, unsigned int, clang::QualType&, clang::DeclContext::specific_decl_iterator<clang::FieldDecl>*, llvm::APSInt*, unsigned int&, clang::InitListExpr*, unsigned int&, bool, bool) SemaInit.cpp:0:0
#10 0x0000000006f02ba9 (anonymous namespace)::InitListChecker::CheckStructUnionTypes(clang::InitializedEntity const&, clang::InitListExpr*, clang::QualType, llvm::iterator_range<clang::CXXBaseSpecifier const*>, clang::DeclContext::specific_decl_iterator<clang::FieldDecl>, bool, unsigned int&, clang::InitListExpr*, unsigned int&, bool) SemaInit.cpp:0:0
#11 0x0000000006f00f88 (anonymous namespace)::InitListChecker::CheckListElementTypes(clang::InitializedEntity const&, clang::InitListExpr*, clang::QualType&, bool, unsigned int&, clang::InitListExpr*, unsigned int&, bool) (.constprop.0) SemaInit.cpp:0:0
#12 0x0000000006eefd2a (anonymous namespace)::InitListChecker::CheckExplicitInitList(clang::InitializedEntity const&, clang::InitListExpr*, clang::QualType&, clang::InitListExpr*, bool) (.constprop.0) SemaInit.cpp:0:0
#13 0x0000000006ef072e (anonymous namespace)::InitListChecker::InitListChecker(clang::Sema&, clang::InitializedEntity const&, clang::InitListExpr*, clang::QualType&, bool, bool, bool, llvm::SmallVectorImpl<clang::QualType>*) SemaInit.cpp:0:0
#14 0x0000000006ef966a TryListInitialization(clang::Sema&, clang::InitializedEntity const&, clang::InitializationKind const&, clang::InitListExpr*, clang::InitializationSequence&, bool) SemaInit.cpp:0:0
#15 0x0000000006ef7483 clang::InitializationSequence::InitializeFrom(clang::Sema&, clang::InitializedEntity const&, clang::InitializationKind const&, llvm::MutableArrayRef<clang::Expr*>, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6ef7483)
#16 0x0000000006dab7b7 clang::Sema::BuildCXXNew(clang::SourceRange, bool, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::SourceRange, clang::QualType, clang::TypeSourceInfo*, std::optional<clang::Expr*>, clang::SourceRange, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6dab7b7)
#17 0x0000000006dac744 clang::Sema::ActOnCXXNew(clang::SourceLocation, bool, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::SourceRange, clang::Declarator&, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6dac744)
#18 0x000000000673a2d9 clang::Parser::ParseCXXNewExpression(bool, clang::SourceLocation) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x673a2d9)
#19 0x000000000671c354 clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x671c354)
#20 0x000000000671daf7 clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, clang::Parser::TypeCastState, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x671daf7)
#21 0x000000000671db89 clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x671db89)
#22 0x00000000067225a9 clang::Parser::ParseExpression(clang::Parser::TypeCastState) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x67225a9)
#23 0x00000000067a5389 clang::Parser::ParseExprStatement(clang::Parser::ParsedStmtContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x67a5389)
#24 0x000000000679b6fc clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x679b6fc)
#25 0x000000000679c610 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x679c610)
#26 0x000000000679d4e5 clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x679d4e5)
#27 0x000000000679ec3a clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x679ec3a)
#28 0x00000000066b27f3 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66b27f3)
#29 0x00000000066e6efd clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::Parser::ParsedTemplateInfo&, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66e6efd)
#30 0x00000000066a653e clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66a653e)
#31 0x00000000066a6cfe clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66a6cfe)
#32 0x00000000066ae493 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66ae493)
#33 0x00000000066af37d clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66af37d)
#34 0x00000000066a189a clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66a189a)
#35 0x000000000454acb8 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x454acb8)
#36 0x00000000048045d9 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48045d9)
#37 0x00000000047837be clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x47837be)
#38 0x00000000048e9cee clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48e9cee)
#39 0x0000000000ce2b8f cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xce2b8f)
#40 0x0000000000cda84a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#41 0x000000000458e0c9 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::'lambda'()>(long) Job.cpp:0:0
#42 0x0000000003b20e54 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3b20e54)
#43 0x000000000458e6bf clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (.part.0) Job.cpp:0:0
#44 0x000000000455487d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x455487d)
#45 0x000000000455596d clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x455596d)
#46 0x000000000455cd25 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x455cd25)
#47 0x0000000000cdfa29 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcdfa29)
#48 0x0000000000baddb4 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xbaddb4)
#49 0x000078d632229d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#50 0x000078d632229e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#51 0x0000000000cda2fe _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcda2fe)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134
```
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