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[Clang] [ICE] [crash-on-valid] clang frontend crashes on clang-18 #86769

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yujincheng08 opened this issue Mar 27, 2024 · 5 comments · Fixed by #86914
Closed

[Clang] [ICE] [crash-on-valid] clang frontend crashes on clang-18 #86769

yujincheng08 opened this issue Mar 27, 2024 · 5 comments · Fixed by #86914
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@zyn0217
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c++20 clang:frontend Language frontend issues, e.g. anything involving "Sema" concepts C++20 concepts confirmed Verified by a second party crash-on-valid regression

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@yujincheng08
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yujincheng08 commented Mar 27, 2024 •
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On clang-17 it works. So this should be a regression.
Example code:

template<typename T>
concept X = true;

template <X T>
class Y {
public:
    Y(T y)  {  }

    template <X U>
    friend class Y;
};

template class Y<int>;

int main() {
    Y y(0);
}

Online demo: https://godbolt.org/z/s7Mq65n98

Backtrace:

clang++: /root/llvm-project/clang/lib/AST/ExprConstant.cpp:15797: 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-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -c --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -std=c++23 <source>
1.	<source>:16:11: current parser token ';'
2.	<source>:15:12: parsing function body 'main'
3.	<source>:15:12: in compound statement ('{}')
 #0 0x00000000039246a8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x39246a8)
 #1 0x000000000392238c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x392238c)
 #2 0x0000000003868c28 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007f61b7642520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007f61b76969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x00007f61b7642476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x00007f61b76287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x00007f61b762871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #8 0x00007f61b7639e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #9 0x00000000074695d8 clang::Expr::EvaluateAsConstantExpr(clang::Expr::EvalResult&, clang::ASTContext const&, clang::Expr::ConstantExprKind) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x74695d8)
#10 0x0000000006486b6e clang::ActionResult<clang::Expr*, true> calculateConstraintSatisfaction<calculateConstraintSatisfaction(clang::Sema&, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&, clang::Expr const*, clang::ConstraintSatisfaction&)::'lambda'(clang::Expr const*)>(clang::Sema&, clang::Expr const*, clang::ConstraintSatisfaction&, calculateConstraintSatisfaction(clang::Sema&, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&, clang::Expr const*, clang::ConstraintSatisfaction&)::'lambda'(clang::Expr const*)&&) SemaConcept.cpp:0:0
#11 0x0000000006487342 CheckConstraintSatisfaction(clang::Sema&, clang::NamedDecl const*, llvm::ArrayRef<clang::Expr const*>, llvm::SmallVectorImpl<clang::Expr*>&, clang::MultiLevelTemplateArgumentList const&, clang::SourceRange, clang::ConstraintSatisfaction&) SemaConcept.cpp:0:0
#12 0x000000000648797a clang::Sema::CheckConstraintSatisfaction(clang::NamedDecl const*, llvm::ArrayRef<clang::Expr const*>, llvm::SmallVectorImpl<clang::Expr*>&, clang::MultiLevelTemplateArgumentList const&, clang::SourceRange, clang::ConstraintSatisfaction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x648797a)
#13 0x0000000006488a3b clang::Sema::CheckInstantiatedFunctionTemplateConstraints(clang::SourceLocation, clang::FunctionDecl*, llvm::ArrayRef<clang::TemplateArgument>, clang::ConstraintSatisfaction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6488a3b)
#14 0x0000000006cfa5f7 clang::Sema::FinishTemplateArgumentDeduction(clang::FunctionTemplateDecl*, llvm::SmallVectorImpl<clang::DeducedTemplateArgument>&, unsigned int, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, llvm::SmallVectorImpl<clang::Sema::OriginalCallArg> const*, bool, llvm::function_ref<bool ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6cfa5f7)
#15 0x0000000006cfbd9a void llvm::function_ref<void ()>::callback_fn<clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, clang::QualType, clang::Expr::Classification, llvm::function_ref<bool (llvm::ArrayRef<clang::QualType>)>)::'lambda1'()>(long) SemaTemplateDeduction.cpp:0:0
#16 0x0000000006320de1 clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6320de1)
#17 0x0000000006d06782 clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, clang::QualType, clang::Expr::Classification, llvm::function_ref<bool (llvm::ArrayRef<clang::QualType>)>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6d06782)
#18 0x0000000006af196e clang::Sema::AddTemplateOverloadCandidate(clang::FunctionTemplateDecl*, clang::DeclAccessPair, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool, bool, bool, clang::CallExpr::ADLCallKind, clang::OverloadCandidateParamOrder, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6af196e)
#19 0x00000000069590a6 clang::Sema::DeduceTemplateSpecializationFromInitializer(clang::TypeSourceInfo*, clang::InitializedEntity const&, clang::InitializationKind const&, llvm::MutableArrayRef<clang::Expr*>)::'lambda0'(bool)::operator()(bool) const SemaInit.cpp:0:0
#20 0x0000000006959e49 clang::Sema::DeduceTemplateSpecializationFromInitializer(clang::TypeSourceInfo*, clang::InitializedEntity const&, clang::InitializationKind const&, llvm::MutableArrayRef<clang::Expr*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6959e49)
#21 0x0000000006515cf5 clang::Sema::deduceVarTypeFromInitializer(clang::VarDecl*, clang::DeclarationName, clang::QualType, clang::TypeSourceInfo*, clang::SourceRange, bool, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6515cf5)
#22 0x0000000006516387 clang::Sema::DeduceVariableDeclarationType(clang::VarDecl*, bool, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6516387)
#23 0x00000000065383a2 clang::Sema::AddInitializerToDecl(clang::Decl*, clang::Expr*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65383a2)
#24 0x00000000061f26b9 clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(clang::Declarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61f26b9)
#25 0x000000000620158a 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+++0x620158a)
#26 0x0000000006209c07 clang::Parser::ParseSimpleDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, bool, clang::Parser::ForRangeInit*, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6209c07)
#27 0x000000000620a0a7 clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x620a0a7)
#28 0x00000000062abd3c 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+++0x62abd3c)
#29 0x00000000062acff7 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62acff7)
#30 0x00000000062adf01 clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62adf01)
#31 0x00000000062af81a clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62af81a)
#32 0x00000000061ca8f1 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61ca8f1)
#33 0x0000000006201f6c 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+++0x6201f6c)
#34 0x00000000061be88e clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61be88e)
#35 0x00000000061bf083 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61bf083)
#36 0x00000000061c64f6 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61c64f6)
#37 0x00000000061c739d clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61c739d)
#38 0x00000000061ba07a clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61ba07a)
#39 0x00000000041c0aa8 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41c0aa8)
#40 0x0000000004440169 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4440169)
#41 0x00000000043c985e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x43c985e)
#42 0x00000000045231ee clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x45231ee)
#43 0x0000000000c296ec cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc296ec)
#44 0x0000000000c2297a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#45 0x0000000004203a19 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
#46 0x00000000038690d4 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x38690d4)
#47 0x000000000420400f 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
#48 0x00000000041ca3a5 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41ca3a5)
#49 0x00000000041cae0d 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+++0x41cae0d)
#50 0x00000000041d2b75 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41d2b75)
#51 0x0000000000c26b85 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc26b85)
#52 0x0000000000b1d084 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xb1d084)
#53 0x00007f61b7629d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#54 0x00007f61b7629e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#55 0x0000000000c2246e _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc2246e)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134
@github-actions github-actions bot added the clang Clang issues not falling into any other category label Mar 27, 2024
@yujincheng08 yujincheng08 changed the title clang frontend crashes on LLVM-18 [Clang] clang frontend crashes on LLVM-18 Mar 27, 2024
@yujincheng08 yujincheng08 changed the title [Clang] clang frontend crashes on LLVM-18 [Clang] clang frontend crashes on clang-18 Mar 27, 2024
@yujincheng08 yujincheng08 mentioned this issue Mar 27, 2024
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@yujincheng08 yujincheng08 changed the title [Clang] clang frontend crashes on clang-18 [Clang] [ICE] [crash-on-valid] clang frontend crashes on clang-18 Mar 27, 2024
@hiraditya hiraditya added c++ concepts C++20 concepts labels Mar 27, 2024
@llvmbot
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llvmbot commented Mar 27, 2024

@llvm/issue-subscribers-c-1

Author: LoveSy (yujincheng08)

On clang-17 it works. So this should be a regression. Example code: 
template&lt;typename T&gt;
concept X = true;

template &lt;X T&gt;
class Y {
public:
    Y(T y)  {  }

    template &lt;X U&gt;
    friend class Y;
};

template class Y&lt;int&gt;;

int main() {
    Y y(0);
}

Online demo: https://godbolt.org/z/s7Mq65n98

Backtrace:

clang++: /root/llvm-project/clang/lib/AST/ExprConstant.cpp:15797: bool clang::Expr::EvaluateAsConstantExpr(clang::Expr::EvalResult&amp;, const clang::ASTContext&amp;, clang::Expr::ConstantExprKind) const: Assertion `!isValueDependent() &amp;&amp; "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-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -c --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -std=c++23 &lt;source&gt;
1.	&lt;source&gt;:16:11: current parser token ';'
2.	&lt;source&gt;:15:12: parsing function body 'main'
3.	&lt;source&gt;:15:12: in compound statement ('{}')
 #<!-- -->0 0x00000000039246a8 llvm::sys::PrintStackTrace(llvm::raw_ostream&amp;, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x39246a8)
 #<!-- -->1 0x000000000392238c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x392238c)
 #<!-- -->2 0x0000000003868c28 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #<!-- -->3 0x00007f61b7642520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #<!-- -->4 0x00007f61b76969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #<!-- -->5 0x00007f61b7642476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #<!-- -->6 0x00007f61b76287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #<!-- -->7 0x00007f61b762871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #<!-- -->8 0x00007f61b7639e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #<!-- -->9 0x00000000074695d8 clang::Expr::EvaluateAsConstantExpr(clang::Expr::EvalResult&amp;, clang::ASTContext const&amp;, clang::Expr::ConstantExprKind) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x74695d8)
#<!-- -->10 0x0000000006486b6e clang::ActionResult&lt;clang::Expr*, true&gt; calculateConstraintSatisfaction&lt;calculateConstraintSatisfaction(clang::Sema&amp;, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&amp;, clang::Expr const*, clang::ConstraintSatisfaction&amp;)::'lambda'(clang::Expr const*)&gt;(clang::Sema&amp;, clang::Expr const*, clang::ConstraintSatisfaction&amp;, calculateConstraintSatisfaction(clang::Sema&amp;, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&amp;, clang::Expr const*, clang::ConstraintSatisfaction&amp;)::'lambda'(clang::Expr const*)&amp;&amp;) SemaConcept.cpp:0:0
#<!-- -->11 0x0000000006487342 CheckConstraintSatisfaction(clang::Sema&amp;, clang::NamedDecl const*, llvm::ArrayRef&lt;clang::Expr const*&gt;, llvm::SmallVectorImpl&lt;clang::Expr*&gt;&amp;, clang::MultiLevelTemplateArgumentList const&amp;, clang::SourceRange, clang::ConstraintSatisfaction&amp;) SemaConcept.cpp:0:0
#<!-- -->12 0x000000000648797a clang::Sema::CheckConstraintSatisfaction(clang::NamedDecl const*, llvm::ArrayRef&lt;clang::Expr const*&gt;, llvm::SmallVectorImpl&lt;clang::Expr*&gt;&amp;, clang::MultiLevelTemplateArgumentList const&amp;, clang::SourceRange, clang::ConstraintSatisfaction&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x648797a)
#<!-- -->13 0x0000000006488a3b clang::Sema::CheckInstantiatedFunctionTemplateConstraints(clang::SourceLocation, clang::FunctionDecl*, llvm::ArrayRef&lt;clang::TemplateArgument&gt;, clang::ConstraintSatisfaction&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6488a3b)
#<!-- -->14 0x0000000006cfa5f7 clang::Sema::FinishTemplateArgumentDeduction(clang::FunctionTemplateDecl*, llvm::SmallVectorImpl&lt;clang::DeducedTemplateArgument&gt;&amp;, unsigned int, clang::FunctionDecl*&amp;, clang::sema::TemplateDeductionInfo&amp;, llvm::SmallVectorImpl&lt;clang::Sema::OriginalCallArg&gt; const*, bool, llvm::function_ref&lt;bool ()&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6cfa5f7)
#<!-- -->15 0x0000000006cfbd9a void llvm::function_ref&lt;void ()&gt;::callback_fn&lt;clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef&lt;clang::Expr*&gt;, clang::FunctionDecl*&amp;, clang::sema::TemplateDeductionInfo&amp;, bool, bool, clang::QualType, clang::Expr::Classification, llvm::function_ref&lt;bool (llvm::ArrayRef&lt;clang::QualType&gt;)&gt;)::'lambda1'()&gt;(long) SemaTemplateDeduction.cpp:0:0
#<!-- -->16 0x0000000006320de1 clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref&lt;void ()&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6320de1)
#<!-- -->17 0x0000000006d06782 clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef&lt;clang::Expr*&gt;, clang::FunctionDecl*&amp;, clang::sema::TemplateDeductionInfo&amp;, bool, bool, clang::QualType, clang::Expr::Classification, llvm::function_ref&lt;bool (llvm::ArrayRef&lt;clang::QualType&gt;)&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6d06782)
#<!-- -->18 0x0000000006af196e clang::Sema::AddTemplateOverloadCandidate(clang::FunctionTemplateDecl*, clang::DeclAccessPair, clang::TemplateArgumentListInfo*, llvm::ArrayRef&lt;clang::Expr*&gt;, clang::OverloadCandidateSet&amp;, bool, bool, bool, clang::CallExpr::ADLCallKind, clang::OverloadCandidateParamOrder, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6af196e)
#<!-- -->19 0x00000000069590a6 clang::Sema::DeduceTemplateSpecializationFromInitializer(clang::TypeSourceInfo*, clang::InitializedEntity const&amp;, clang::InitializationKind const&amp;, llvm::MutableArrayRef&lt;clang::Expr*&gt;)::'lambda0'(bool)::operator()(bool) const SemaInit.cpp:0:0
#<!-- -->20 0x0000000006959e49 clang::Sema::DeduceTemplateSpecializationFromInitializer(clang::TypeSourceInfo*, clang::InitializedEntity const&amp;, clang::InitializationKind const&amp;, llvm::MutableArrayRef&lt;clang::Expr*&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6959e49)
#<!-- -->21 0x0000000006515cf5 clang::Sema::deduceVarTypeFromInitializer(clang::VarDecl*, clang::DeclarationName, clang::QualType, clang::TypeSourceInfo*, clang::SourceRange, bool, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6515cf5)
#<!-- -->22 0x0000000006516387 clang::Sema::DeduceVariableDeclarationType(clang::VarDecl*, bool, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6516387)
#<!-- -->23 0x00000000065383a2 clang::Sema::AddInitializerToDecl(clang::Decl*, clang::Expr*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65383a2)
#<!-- -->24 0x00000000061f26b9 clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(clang::Declarator&amp;, clang::Parser::ParsedTemplateInfo const&amp;, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61f26b9)
#<!-- -->25 0x000000000620158a clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&amp;, clang::DeclaratorContext, clang::ParsedAttributes&amp;, clang::Parser::ParsedTemplateInfo&amp;, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x620158a)
#<!-- -->26 0x0000000006209c07 clang::Parser::ParseSimpleDeclaration(clang::DeclaratorContext, clang::SourceLocation&amp;, clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, bool, clang::Parser::ForRangeInit*, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6209c07)
#<!-- -->27 0x000000000620a0a7 clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&amp;, clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x620a0a7)
#<!-- -->28 0x00000000062abd3c clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector&lt;clang::Stmt*, 32u&gt;&amp;, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62abd3c)
#<!-- -->29 0x00000000062acff7 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector&lt;clang::Stmt*, 32u&gt;&amp;, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62acff7)
#<!-- -->30 0x00000000062adf01 clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62adf01)
#<!-- -->31 0x00000000062af81a clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62af81a)
#<!-- -->32 0x00000000061ca8f1 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&amp;, clang::Parser::ParsedTemplateInfo const&amp;, clang::Parser::LateParsedAttrList*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61ca8f1)
#<!-- -->33 0x0000000006201f6c clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&amp;, clang::DeclaratorContext, clang::ParsedAttributes&amp;, clang::Parser::ParsedTemplateInfo&amp;, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6201f6c)
#<!-- -->34 0x00000000061be88e clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec&amp;, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61be88e)
#<!-- -->35 0x00000000061bf083 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61bf083)
#<!-- -->36 0x00000000061c64f6 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61c64f6)
#<!-- -->37 0x00000000061c739d clang::Parser::ParseTopLevelDecl(clang::OpaquePtr&lt;clang::DeclGroupRef&gt;&amp;, clang::Sema::ModuleImportState&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61c739d)
#<!-- -->38 0x00000000061ba07a clang::ParseAST(clang::Sema&amp;, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61ba07a)
#<!-- -->39 0x00000000041c0aa8 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41c0aa8)
#<!-- -->40 0x0000000004440169 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4440169)
#<!-- -->41 0x00000000043c985e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x43c985e)
#<!-- -->42 0x00000000045231ee clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x45231ee)
#<!-- -->43 0x0000000000c296ec cc1_main(llvm::ArrayRef&lt;char const*&gt;, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc296ec)
#<!-- -->44 0x0000000000c2297a ExecuteCC1Tool(llvm::SmallVectorImpl&lt;char const*&gt;&amp;, llvm::ToolContext const&amp;) driver.cpp:0:0
#<!-- -->45 0x0000000004203a19 void llvm::function_ref&lt;void ()&gt;::callback_fn&lt;clang::driver::CC1Command::Execute(llvm::ArrayRef&lt;std::optional&lt;llvm::StringRef&gt;&gt;, std::__cxx11::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt;&gt;*, bool*) const::'lambda'()&gt;(long) Job.cpp:0:0
#<!-- -->46 0x00000000038690d4 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref&lt;void ()&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x38690d4)
#<!-- -->47 0x000000000420400f clang::driver::CC1Command::Execute(llvm::ArrayRef&lt;std::optional&lt;llvm::StringRef&gt;&gt;, std::__cxx11::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt;&gt;*, bool*) const (.part.0) Job.cpp:0:0
#<!-- -->48 0x00000000041ca3a5 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&amp;, clang::driver::Command const*&amp;, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41ca3a5)
#<!-- -->49 0x00000000041cae0d clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&amp;, llvm::SmallVectorImpl&lt;std::pair&lt;int, clang::driver::Command const*&gt;&gt;&amp;, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41cae0d)
#<!-- -->50 0x00000000041d2b75 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&amp;, llvm::SmallVectorImpl&lt;std::pair&lt;int, clang::driver::Command const*&gt;&gt;&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41d2b75)
#<!-- -->51 0x0000000000c26b85 clang_main(int, char**, llvm::ToolContext const&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc26b85)
#<!-- -->52 0x0000000000b1d084 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xb1d084)
#<!-- -->53 0x00007f61b7629d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#<!-- -->54 0x00007f61b7629e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#<!-- -->55 0x0000000000c2246e _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc2246e)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134

@EugeneZelenko EugeneZelenko added clang:frontend Language frontend issues, e.g. anything involving "Sema" and removed clang Clang issues not falling into any other category labels Mar 27, 2024
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llvmbot commented Mar 27, 2024

@llvm/issue-subscribers-clang-frontend

Author: LoveSy (yujincheng08)

On clang-17 it works. So this should be a regression. Example code: 
template&lt;typename T&gt;
concept X = true;

template &lt;X T&gt;
class Y {
public:
    Y(T y)  {  }

    template &lt;X U&gt;
    friend class Y;
};

template class Y&lt;int&gt;;

int main() {
    Y y(0);
}

Online demo: https://godbolt.org/z/s7Mq65n98

Backtrace:

clang++: /root/llvm-project/clang/lib/AST/ExprConstant.cpp:15797: bool clang::Expr::EvaluateAsConstantExpr(clang::Expr::EvalResult&amp;, const clang::ASTContext&amp;, clang::Expr::ConstantExprKind) const: Assertion `!isValueDependent() &amp;&amp; "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-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -c --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -std=c++23 &lt;source&gt;
1.	&lt;source&gt;:16:11: current parser token ';'
2.	&lt;source&gt;:15:12: parsing function body 'main'
3.	&lt;source&gt;:15:12: in compound statement ('{}')
 #<!-- -->0 0x00000000039246a8 llvm::sys::PrintStackTrace(llvm::raw_ostream&amp;, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x39246a8)
 #<!-- -->1 0x000000000392238c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x392238c)
 #<!-- -->2 0x0000000003868c28 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #<!-- -->3 0x00007f61b7642520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #<!-- -->4 0x00007f61b76969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #<!-- -->5 0x00007f61b7642476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #<!-- -->6 0x00007f61b76287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #<!-- -->7 0x00007f61b762871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #<!-- -->8 0x00007f61b7639e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #<!-- -->9 0x00000000074695d8 clang::Expr::EvaluateAsConstantExpr(clang::Expr::EvalResult&amp;, clang::ASTContext const&amp;, clang::Expr::ConstantExprKind) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x74695d8)
#<!-- -->10 0x0000000006486b6e clang::ActionResult&lt;clang::Expr*, true&gt; calculateConstraintSatisfaction&lt;calculateConstraintSatisfaction(clang::Sema&amp;, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&amp;, clang::Expr const*, clang::ConstraintSatisfaction&amp;)::'lambda'(clang::Expr const*)&gt;(clang::Sema&amp;, clang::Expr const*, clang::ConstraintSatisfaction&amp;, calculateConstraintSatisfaction(clang::Sema&amp;, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&amp;, clang::Expr const*, clang::ConstraintSatisfaction&amp;)::'lambda'(clang::Expr const*)&amp;&amp;) SemaConcept.cpp:0:0
#<!-- -->11 0x0000000006487342 CheckConstraintSatisfaction(clang::Sema&amp;, clang::NamedDecl const*, llvm::ArrayRef&lt;clang::Expr const*&gt;, llvm::SmallVectorImpl&lt;clang::Expr*&gt;&amp;, clang::MultiLevelTemplateArgumentList const&amp;, clang::SourceRange, clang::ConstraintSatisfaction&amp;) SemaConcept.cpp:0:0
#<!-- -->12 0x000000000648797a clang::Sema::CheckConstraintSatisfaction(clang::NamedDecl const*, llvm::ArrayRef&lt;clang::Expr const*&gt;, llvm::SmallVectorImpl&lt;clang::Expr*&gt;&amp;, clang::MultiLevelTemplateArgumentList const&amp;, clang::SourceRange, clang::ConstraintSatisfaction&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x648797a)
#<!-- -->13 0x0000000006488a3b clang::Sema::CheckInstantiatedFunctionTemplateConstraints(clang::SourceLocation, clang::FunctionDecl*, llvm::ArrayRef&lt;clang::TemplateArgument&gt;, clang::ConstraintSatisfaction&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6488a3b)
#<!-- -->14 0x0000000006cfa5f7 clang::Sema::FinishTemplateArgumentDeduction(clang::FunctionTemplateDecl*, llvm::SmallVectorImpl&lt;clang::DeducedTemplateArgument&gt;&amp;, unsigned int, clang::FunctionDecl*&amp;, clang::sema::TemplateDeductionInfo&amp;, llvm::SmallVectorImpl&lt;clang::Sema::OriginalCallArg&gt; const*, bool, llvm::function_ref&lt;bool ()&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6cfa5f7)
#<!-- -->15 0x0000000006cfbd9a void llvm::function_ref&lt;void ()&gt;::callback_fn&lt;clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef&lt;clang::Expr*&gt;, clang::FunctionDecl*&amp;, clang::sema::TemplateDeductionInfo&amp;, bool, bool, clang::QualType, clang::Expr::Classification, llvm::function_ref&lt;bool (llvm::ArrayRef&lt;clang::QualType&gt;)&gt;)::'lambda1'()&gt;(long) SemaTemplateDeduction.cpp:0:0
#<!-- -->16 0x0000000006320de1 clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref&lt;void ()&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6320de1)
#<!-- -->17 0x0000000006d06782 clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef&lt;clang::Expr*&gt;, clang::FunctionDecl*&amp;, clang::sema::TemplateDeductionInfo&amp;, bool, bool, clang::QualType, clang::Expr::Classification, llvm::function_ref&lt;bool (llvm::ArrayRef&lt;clang::QualType&gt;)&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6d06782)
#<!-- -->18 0x0000000006af196e clang::Sema::AddTemplateOverloadCandidate(clang::FunctionTemplateDecl*, clang::DeclAccessPair, clang::TemplateArgumentListInfo*, llvm::ArrayRef&lt;clang::Expr*&gt;, clang::OverloadCandidateSet&amp;, bool, bool, bool, clang::CallExpr::ADLCallKind, clang::OverloadCandidateParamOrder, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6af196e)
#<!-- -->19 0x00000000069590a6 clang::Sema::DeduceTemplateSpecializationFromInitializer(clang::TypeSourceInfo*, clang::InitializedEntity const&amp;, clang::InitializationKind const&amp;, llvm::MutableArrayRef&lt;clang::Expr*&gt;)::'lambda0'(bool)::operator()(bool) const SemaInit.cpp:0:0
#<!-- -->20 0x0000000006959e49 clang::Sema::DeduceTemplateSpecializationFromInitializer(clang::TypeSourceInfo*, clang::InitializedEntity const&amp;, clang::InitializationKind const&amp;, llvm::MutableArrayRef&lt;clang::Expr*&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6959e49)
#<!-- -->21 0x0000000006515cf5 clang::Sema::deduceVarTypeFromInitializer(clang::VarDecl*, clang::DeclarationName, clang::QualType, clang::TypeSourceInfo*, clang::SourceRange, bool, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6515cf5)
#<!-- -->22 0x0000000006516387 clang::Sema::DeduceVariableDeclarationType(clang::VarDecl*, bool, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6516387)
#<!-- -->23 0x00000000065383a2 clang::Sema::AddInitializerToDecl(clang::Decl*, clang::Expr*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65383a2)
#<!-- -->24 0x00000000061f26b9 clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(clang::Declarator&amp;, clang::Parser::ParsedTemplateInfo const&amp;, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61f26b9)
#<!-- -->25 0x000000000620158a clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&amp;, clang::DeclaratorContext, clang::ParsedAttributes&amp;, clang::Parser::ParsedTemplateInfo&amp;, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x620158a)
#<!-- -->26 0x0000000006209c07 clang::Parser::ParseSimpleDeclaration(clang::DeclaratorContext, clang::SourceLocation&amp;, clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, bool, clang::Parser::ForRangeInit*, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6209c07)
#<!-- -->27 0x000000000620a0a7 clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&amp;, clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x620a0a7)
#<!-- -->28 0x00000000062abd3c clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector&lt;clang::Stmt*, 32u&gt;&amp;, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62abd3c)
#<!-- -->29 0x00000000062acff7 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector&lt;clang::Stmt*, 32u&gt;&amp;, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62acff7)
#<!-- -->30 0x00000000062adf01 clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62adf01)
#<!-- -->31 0x00000000062af81a clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62af81a)
#<!-- -->32 0x00000000061ca8f1 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&amp;, clang::Parser::ParsedTemplateInfo const&amp;, clang::Parser::LateParsedAttrList*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61ca8f1)
#<!-- -->33 0x0000000006201f6c clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&amp;, clang::DeclaratorContext, clang::ParsedAttributes&amp;, clang::Parser::ParsedTemplateInfo&amp;, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6201f6c)
#<!-- -->34 0x00000000061be88e clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec&amp;, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61be88e)
#<!-- -->35 0x00000000061bf083 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61bf083)
#<!-- -->36 0x00000000061c64f6 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61c64f6)
#<!-- -->37 0x00000000061c739d clang::Parser::ParseTopLevelDecl(clang::OpaquePtr&lt;clang::DeclGroupRef&gt;&amp;, clang::Sema::ModuleImportState&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61c739d)
#<!-- -->38 0x00000000061ba07a clang::ParseAST(clang::Sema&amp;, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61ba07a)
#<!-- -->39 0x00000000041c0aa8 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41c0aa8)
#<!-- -->40 0x0000000004440169 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4440169)
#<!-- -->41 0x00000000043c985e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x43c985e)
#<!-- -->42 0x00000000045231ee clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x45231ee)
#<!-- -->43 0x0000000000c296ec cc1_main(llvm::ArrayRef&lt;char const*&gt;, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc296ec)
#<!-- -->44 0x0000000000c2297a ExecuteCC1Tool(llvm::SmallVectorImpl&lt;char const*&gt;&amp;, llvm::ToolContext const&amp;) driver.cpp:0:0
#<!-- -->45 0x0000000004203a19 void llvm::function_ref&lt;void ()&gt;::callback_fn&lt;clang::driver::CC1Command::Execute(llvm::ArrayRef&lt;std::optional&lt;llvm::StringRef&gt;&gt;, std::__cxx11::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt;&gt;*, bool*) const::'lambda'()&gt;(long) Job.cpp:0:0
#<!-- -->46 0x00000000038690d4 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref&lt;void ()&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x38690d4)
#<!-- -->47 0x000000000420400f clang::driver::CC1Command::Execute(llvm::ArrayRef&lt;std::optional&lt;llvm::StringRef&gt;&gt;, std::__cxx11::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt;&gt;*, bool*) const (.part.0) Job.cpp:0:0
#<!-- -->48 0x00000000041ca3a5 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&amp;, clang::driver::Command const*&amp;, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41ca3a5)
#<!-- -->49 0x00000000041cae0d clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&amp;, llvm::SmallVectorImpl&lt;std::pair&lt;int, clang::driver::Command const*&gt;&gt;&amp;, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41cae0d)
#<!-- -->50 0x00000000041d2b75 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&amp;, llvm::SmallVectorImpl&lt;std::pair&lt;int, clang::driver::Command const*&gt;&gt;&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41d2b75)
#<!-- -->51 0x0000000000c26b85 clang_main(int, char**, llvm::ToolContext const&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc26b85)
#<!-- -->52 0x0000000000b1d084 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xb1d084)
#<!-- -->53 0x00007f61b7629d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#<!-- -->54 0x00007f61b7629e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#<!-- -->55 0x0000000000c2246e _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc2246e)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134

@EugeneZelenko EugeneZelenko added c++20 and removed c++ labels Mar 27, 2024
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llvmbot commented Mar 27, 2024

@llvm/issue-subscribers-c-20

Author: LoveSy (yujincheng08)

On clang-17 it works. So this should be a regression. Example code: 
template&lt;typename T&gt;
concept X = true;

template &lt;X T&gt;
class Y {
public:
    Y(T y)  {  }

    template &lt;X U&gt;
    friend class Y;
};

template class Y&lt;int&gt;;

int main() {
    Y y(0);
}

Online demo: https://godbolt.org/z/s7Mq65n98

Backtrace:

clang++: /root/llvm-project/clang/lib/AST/ExprConstant.cpp:15797: bool clang::Expr::EvaluateAsConstantExpr(clang::Expr::EvalResult&amp;, const clang::ASTContext&amp;, clang::Expr::ConstantExprKind) const: Assertion `!isValueDependent() &amp;&amp; "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-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -c --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -std=c++23 &lt;source&gt;
1.	&lt;source&gt;:16:11: current parser token ';'
2.	&lt;source&gt;:15:12: parsing function body 'main'
3.	&lt;source&gt;:15:12: in compound statement ('{}')
 #<!-- -->0 0x00000000039246a8 llvm::sys::PrintStackTrace(llvm::raw_ostream&amp;, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x39246a8)
 #<!-- -->1 0x000000000392238c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x392238c)
 #<!-- -->2 0x0000000003868c28 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #<!-- -->3 0x00007f61b7642520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #<!-- -->4 0x00007f61b76969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #<!-- -->5 0x00007f61b7642476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #<!-- -->6 0x00007f61b76287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #<!-- -->7 0x00007f61b762871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #<!-- -->8 0x00007f61b7639e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #<!-- -->9 0x00000000074695d8 clang::Expr::EvaluateAsConstantExpr(clang::Expr::EvalResult&amp;, clang::ASTContext const&amp;, clang::Expr::ConstantExprKind) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x74695d8)
#<!-- -->10 0x0000000006486b6e clang::ActionResult&lt;clang::Expr*, true&gt; calculateConstraintSatisfaction&lt;calculateConstraintSatisfaction(clang::Sema&amp;, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&amp;, clang::Expr const*, clang::ConstraintSatisfaction&amp;)::'lambda'(clang::Expr const*)&gt;(clang::Sema&amp;, clang::Expr const*, clang::ConstraintSatisfaction&amp;, calculateConstraintSatisfaction(clang::Sema&amp;, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&amp;, clang::Expr const*, clang::ConstraintSatisfaction&amp;)::'lambda'(clang::Expr const*)&amp;&amp;) SemaConcept.cpp:0:0
#<!-- -->11 0x0000000006487342 CheckConstraintSatisfaction(clang::Sema&amp;, clang::NamedDecl const*, llvm::ArrayRef&lt;clang::Expr const*&gt;, llvm::SmallVectorImpl&lt;clang::Expr*&gt;&amp;, clang::MultiLevelTemplateArgumentList const&amp;, clang::SourceRange, clang::ConstraintSatisfaction&amp;) SemaConcept.cpp:0:0
#<!-- -->12 0x000000000648797a clang::Sema::CheckConstraintSatisfaction(clang::NamedDecl const*, llvm::ArrayRef&lt;clang::Expr const*&gt;, llvm::SmallVectorImpl&lt;clang::Expr*&gt;&amp;, clang::MultiLevelTemplateArgumentList const&amp;, clang::SourceRange, clang::ConstraintSatisfaction&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x648797a)
#<!-- -->13 0x0000000006488a3b clang::Sema::CheckInstantiatedFunctionTemplateConstraints(clang::SourceLocation, clang::FunctionDecl*, llvm::ArrayRef&lt;clang::TemplateArgument&gt;, clang::ConstraintSatisfaction&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6488a3b)
#<!-- -->14 0x0000000006cfa5f7 clang::Sema::FinishTemplateArgumentDeduction(clang::FunctionTemplateDecl*, llvm::SmallVectorImpl&lt;clang::DeducedTemplateArgument&gt;&amp;, unsigned int, clang::FunctionDecl*&amp;, clang::sema::TemplateDeductionInfo&amp;, llvm::SmallVectorImpl&lt;clang::Sema::OriginalCallArg&gt; const*, bool, llvm::function_ref&lt;bool ()&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6cfa5f7)
#<!-- -->15 0x0000000006cfbd9a void llvm::function_ref&lt;void ()&gt;::callback_fn&lt;clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef&lt;clang::Expr*&gt;, clang::FunctionDecl*&amp;, clang::sema::TemplateDeductionInfo&amp;, bool, bool, clang::QualType, clang::Expr::Classification, llvm::function_ref&lt;bool (llvm::ArrayRef&lt;clang::QualType&gt;)&gt;)::'lambda1'()&gt;(long) SemaTemplateDeduction.cpp:0:0
#<!-- -->16 0x0000000006320de1 clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref&lt;void ()&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6320de1)
#<!-- -->17 0x0000000006d06782 clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef&lt;clang::Expr*&gt;, clang::FunctionDecl*&amp;, clang::sema::TemplateDeductionInfo&amp;, bool, bool, clang::QualType, clang::Expr::Classification, llvm::function_ref&lt;bool (llvm::ArrayRef&lt;clang::QualType&gt;)&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6d06782)
#<!-- -->18 0x0000000006af196e clang::Sema::AddTemplateOverloadCandidate(clang::FunctionTemplateDecl*, clang::DeclAccessPair, clang::TemplateArgumentListInfo*, llvm::ArrayRef&lt;clang::Expr*&gt;, clang::OverloadCandidateSet&amp;, bool, bool, bool, clang::CallExpr::ADLCallKind, clang::OverloadCandidateParamOrder, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6af196e)
#<!-- -->19 0x00000000069590a6 clang::Sema::DeduceTemplateSpecializationFromInitializer(clang::TypeSourceInfo*, clang::InitializedEntity const&amp;, clang::InitializationKind const&amp;, llvm::MutableArrayRef&lt;clang::Expr*&gt;)::'lambda0'(bool)::operator()(bool) const SemaInit.cpp:0:0
#<!-- -->20 0x0000000006959e49 clang::Sema::DeduceTemplateSpecializationFromInitializer(clang::TypeSourceInfo*, clang::InitializedEntity const&amp;, clang::InitializationKind const&amp;, llvm::MutableArrayRef&lt;clang::Expr*&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6959e49)
#<!-- -->21 0x0000000006515cf5 clang::Sema::deduceVarTypeFromInitializer(clang::VarDecl*, clang::DeclarationName, clang::QualType, clang::TypeSourceInfo*, clang::SourceRange, bool, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6515cf5)
#<!-- -->22 0x0000000006516387 clang::Sema::DeduceVariableDeclarationType(clang::VarDecl*, bool, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6516387)
#<!-- -->23 0x00000000065383a2 clang::Sema::AddInitializerToDecl(clang::Decl*, clang::Expr*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65383a2)
#<!-- -->24 0x00000000061f26b9 clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(clang::Declarator&amp;, clang::Parser::ParsedTemplateInfo const&amp;, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61f26b9)
#<!-- -->25 0x000000000620158a clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&amp;, clang::DeclaratorContext, clang::ParsedAttributes&amp;, clang::Parser::ParsedTemplateInfo&amp;, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x620158a)
#<!-- -->26 0x0000000006209c07 clang::Parser::ParseSimpleDeclaration(clang::DeclaratorContext, clang::SourceLocation&amp;, clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, bool, clang::Parser::ForRangeInit*, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6209c07)
#<!-- -->27 0x000000000620a0a7 clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&amp;, clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x620a0a7)
#<!-- -->28 0x00000000062abd3c clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector&lt;clang::Stmt*, 32u&gt;&amp;, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62abd3c)
#<!-- -->29 0x00000000062acff7 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector&lt;clang::Stmt*, 32u&gt;&amp;, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62acff7)
#<!-- -->30 0x00000000062adf01 clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62adf01)
#<!-- -->31 0x00000000062af81a clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62af81a)
#<!-- -->32 0x00000000061ca8f1 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&amp;, clang::Parser::ParsedTemplateInfo const&amp;, clang::Parser::LateParsedAttrList*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61ca8f1)
#<!-- -->33 0x0000000006201f6c clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&amp;, clang::DeclaratorContext, clang::ParsedAttributes&amp;, clang::Parser::ParsedTemplateInfo&amp;, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6201f6c)
#<!-- -->34 0x00000000061be88e clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec&amp;, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61be88e)
#<!-- -->35 0x00000000061bf083 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61bf083)
#<!-- -->36 0x00000000061c64f6 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61c64f6)
#<!-- -->37 0x00000000061c739d clang::Parser::ParseTopLevelDecl(clang::OpaquePtr&lt;clang::DeclGroupRef&gt;&amp;, clang::Sema::ModuleImportState&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61c739d)
#<!-- -->38 0x00000000061ba07a clang::ParseAST(clang::Sema&amp;, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x61ba07a)
#<!-- -->39 0x00000000041c0aa8 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41c0aa8)
#<!-- -->40 0x0000000004440169 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4440169)
#<!-- -->41 0x00000000043c985e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x43c985e)
#<!-- -->42 0x00000000045231ee clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x45231ee)
#<!-- -->43 0x0000000000c296ec cc1_main(llvm::ArrayRef&lt;char const*&gt;, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc296ec)
#<!-- -->44 0x0000000000c2297a ExecuteCC1Tool(llvm::SmallVectorImpl&lt;char const*&gt;&amp;, llvm::ToolContext const&amp;) driver.cpp:0:0
#<!-- -->45 0x0000000004203a19 void llvm::function_ref&lt;void ()&gt;::callback_fn&lt;clang::driver::CC1Command::Execute(llvm::ArrayRef&lt;std::optional&lt;llvm::StringRef&gt;&gt;, std::__cxx11::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt;&gt;*, bool*) const::'lambda'()&gt;(long) Job.cpp:0:0
#<!-- -->46 0x00000000038690d4 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref&lt;void ()&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x38690d4)
#<!-- -->47 0x000000000420400f clang::driver::CC1Command::Execute(llvm::ArrayRef&lt;std::optional&lt;llvm::StringRef&gt;&gt;, std::__cxx11::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt;&gt;*, bool*) const (.part.0) Job.cpp:0:0
#<!-- -->48 0x00000000041ca3a5 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&amp;, clang::driver::Command const*&amp;, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41ca3a5)
#<!-- -->49 0x00000000041cae0d clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&amp;, llvm::SmallVectorImpl&lt;std::pair&lt;int, clang::driver::Command const*&gt;&gt;&amp;, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41cae0d)
#<!-- -->50 0x00000000041d2b75 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&amp;, llvm::SmallVectorImpl&lt;std::pair&lt;int, clang::driver::Command const*&gt;&gt;&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41d2b75)
#<!-- -->51 0x0000000000c26b85 clang_main(int, char**, llvm::ToolContext const&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc26b85)
#<!-- -->52 0x0000000000b1d084 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xb1d084)
#<!-- -->53 0x00007f61b7629d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#<!-- -->54 0x00007f61b7629e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#<!-- -->55 0x0000000000c2246e _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc2246e)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134

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zyn0217 commented Mar 27, 2024

Confirmed. https://godbolt.org/z/a44zMz1bh

@zyn0217 zyn0217 added the confirmed Verified by a second party label Mar 27, 2024
@zyn0217 zyn0217 self-assigned this Mar 28, 2024
zyn0217 added a commit to zyn0217/llvm-project that referenced this issue Mar 28, 2024
@zyn0217
[clang][Sema] Fix a CTAD regression after 42239d2
b31ca78 
The most recent declaration of a template as a friend can introduce
a different template parameter depth compared to what we anticipate
from a CTAD guide.

Fixes llvm#86769
@zyn0217 zyn0217 mentioned this issue Mar 28, 2024
Merged
zyn0217 added a commit that referenced this issue Mar 29, 2024
@zyn0217
[clang][Sema] Fix a CTAD regression after 42239d2 (#86914)
0f6ed4c 
The most recent declaration of a template as a friend can introduce a
different template parameter depth compared to what we anticipate from a
CTAD guide.

Fixes #86769
zyn0217 added a commit to zyn0217/llvm-project that referenced this issue Mar 29, 2024
@zyn0217
[clang][Sema] Fix a CTAD regression after 42239d2 (llvm#86914)
997ea41 
The most recent declaration of a template as a friend can introduce a
different template parameter depth compared to what we anticipate from a
CTAD guide.

Fixes llvm#86769
tstellar pushed a commit to zyn0217/llvm-project that referenced this issue Apr 1, 2024
@zyn0217 @tstellar
[clang][Sema] Fix a CTAD regression after 42239d2 (llvm#86914)
76c7219 
The most recent declaration of a template as a friend can introduce a
different template parameter depth compared to what we anticipate from a
CTAD guide.

Fixes llvm#86769
@zyn0217 zyn0217 mentioned this issue Apr 3, 2024
Open
@zyn0217
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zyn0217 commented Apr 4, 2024

The fix is now available on clang 18.1.3.

@yujincheng08 yujincheng08 mentioned this issue Apr 11, 2024
Closed
@tcbrindle tcbrindle mentioned this issue Apr 25, 2024
Closed
xgupta pushed a commit to xgupta/llvm-project that referenced this issue Sep 9, 2024
@zyn0217
[clang][Sema] Fix a CTAD regression after 42239d2 (llvm#86914)
9c00054 
The most recent declaration of a template as a friend can introduce a
different template parameter depth compared to what we anticipate from a
CTAD guide.

Fixes llvm#86769
xgupta pushed a commit to xgupta/llvm-project that referenced this issue Oct 10, 2024
@zyn0217 @xgupta
[clang][Sema] Fix a CTAD regression after 42239d2 (llvm#86914)
3817320 
The most recent declaration of a template as a friend can introduce a
different template parameter depth compared to what we anticipate from a
CTAD guide.

Fixes llvm#86769
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[clang][Sema] Fix a CTAD regression after 42239d2e9 zyn0217/llvm-project
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