| Issue |
178097
|
| Summary |
Clang with C++Modules crashes on template constraints
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
Maslowian
|
Godbolt: https://godbolt.org/z/b9GaGo1sE
Without using C++Module it works fine.
When I try to compile it with godbolt's clang trunk, it doesn't crash, but sfinae doesn't seem to be working.
Stacktrace:
```
/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang++ --gcc-toolchain=/opt/compiler-explorer/gcc-15.2.0 -I/app/. -fcolor-diagnostics -fno-crash-diagnostics -std=gnu++20 -MD -MT CMakeFiles/args.dir/args.cpp.o -MF CMakeFiles/args.dir/args.cpp.o.d @CMakeFiles/args.dir/args.cpp.o.modmap -o CMakeFiles/args.dir/args.cpp.o -c /app/args.cpp
clang++: /root/llvm-project/clang/lib/AST/ExprConstant.cpp:16995: bool clang::Expr::EvaluateAsConstantExpr(clang::Expr::EvalResult&, const clang::ASTContext&, clang::Expr::ConstantExprKind) const: Assertion `!isValueDependent() && "_expression_ evaluator can't be called on a dependent _expression_."' 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-21.1.0/bin/clang++ --gcc-toolchain=/opt/compiler-explorer/gcc-15.2.0 -I/app/. -fcolor-diagnostics -fno-crash-diagnostics -std=gnu++20 -MD -MT CMakeFiles/args.dir/args.cpp.o -MF CMakeFiles/args.dir/args.cpp.o.d @CMakeFiles/args.dir/args.cpp.o.modmap -o CMakeFiles/args.dir/args.cpp.o -c /app/args.cpp
1. /app/args.cpp:9:10: at annotation token
#0 0x0000000004019ae8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x4019ae8)
#1 0x0000000004016f14 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x4016f14)
#2 0x0000000003f5b698 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x00007b6874042520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x00007b68740969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x00007b6874042476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x00007b68740287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x00007b687402871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#8 0x00007b6874039e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#9 0x000000000796c84a clang::Expr::EvaluateAsConstantExpr(clang::Expr::EvalResult&, clang::ASTContext const&, clang::Expr::ConstantExprKind) const (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x796c84a)
#10 0x00000000069c3eb9 calculateConstraintSatisfaction(clang::Sema&, clang::Expr const*, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&, clang::ConstraintSatisfaction&) SemaConcept.cpp:0:0
#11 0x00000000069c55d9 CheckConstraintSatisfaction(clang::Sema&, clang::NamedDecl const*, llvm::ArrayRef<clang::AssociatedConstraint>, llvm::SmallVectorImpl<clang::Expr*>&, clang::MultiLevelTemplateArgumentList const&, clang::SourceRange, clang::ConstraintSatisfaction&) SemaConcept.cpp:0:0
#12 0x00000000069c5c05 clang::Sema::CheckConstraintSatisfaction(clang::NamedDecl const*, llvm::ArrayRef<clang::AssociatedConstraint>, llvm::SmallVectorImpl<clang::Expr*>&, clang::MultiLevelTemplateArgumentList const&, clang::SourceRange, clang::ConstraintSatisfaction&) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x69c5c05)
#13 0x00000000069d191c clang::Sema::EnsureTemplateArgumentListConstraints(clang::TemplateDecl*, clang::MultiLevelTemplateArgumentList const&, clang::SourceRange) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x69d191c)
#14 0x00000000070a6ab5 clang::Sema::CheckTemplateArgumentList(clang::TemplateDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo&, clang::DefaultArguments const&, bool, clang::Sema::CheckTemplateArgumentInfo&, bool, bool*) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x70a6ab5)
#15 0x00000000070adf7c clang::Sema::CheckTemplateIdType(clang::TemplateName, clang::SourceLocation, clang::TemplateArgumentListInfo&) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x70adf7c)
#16 0x00000000070b1eb7 clang::Sema::ActOnTemplateIdType(clang::Scope*, clang::CXXScopeSpec&, clang::SourceLocation, clang::OpaquePtr<clang::TemplateName>, clang::IdentifierInfo const*, clang::SourceLocation, clang::SourceLocation, llvm::MutableArrayRef<clang::ParsedTemplateArgument>, clang::SourceLocation, bool, bool, clang::ImplicitTypenameContext) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x70b1eb7)
#17 0x00000000067ef41b clang::Parser::AnnotateTemplateIdTokenAsType(clang::CXXScopeSpec&, clang::ImplicitTypenameContext, bool) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x67ef41b)
#18 0x00000000067165f0 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&, clang::Parser::ParsedTemplateInfo&, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*, clang::ImplicitTypenameContext) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x67165f0)
#19 0x00000000066cf304 clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x66cf304)
#20 0x00000000066cfd39 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x66cfd39)
#21 0x00000000066d7a2a clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x66d7a2a)
#22 0x00000000066d89c5 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x66d89c5)
#23 0x00000000066ca73a clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x66ca73a)
#24 0x00000000049cfa28 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x49cfa28)
#25 0x0000000004cc9f95 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x4cc9f95)
#26 0x0000000004c4688e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x4c4688e)
#27 0x0000000004dbc2e1 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x4dbc2e1)
#28 0x0000000000d93cff cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0xd93cff)
#29 0x0000000000d8a8ba ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#30 0x0000000004a36b79 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
#31 0x0000000003f5bb34 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x3f5bb34)
#32 0x0000000004a3718f 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
#33 0x00000000049f915d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x49f915d)
#34 0x00000000049fa1ee clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x49fa1ee)
#35 0x0000000004a02d85 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x4a02d85)
#36 0x0000000000d9018f clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0xd9018f)
#37 0x0000000000c444d4 main (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0xc444d4)
#38 0x00007b6874029d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#39 0x00007b6874029e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#40 0x0000000000d8a365 _start (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0xd8a365)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
```
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