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8080i opened this issue Apr 21, 2024 · 4 comments · Fixed by #90220
Closed

Clang segfaults when using certain type traits on a class with malformed destructor #89544

8080i opened this issue Apr 21, 2024 · 4 comments · Fixed by #90220
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@Endilll
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c++11 clang:frontend Language frontend issues, e.g. anything involving "Sema" confirmed Verified by a second party crash-on-invalid regression

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@8080i
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8080i commented Apr 21, 2024

bug.cpp

#include <type_traits>

class Foo {
    ~Foo() = {}
};

// All of these crash clang
std::is_trivially_constructible<Foo>::value;
std::is_trivially_default_constructible<Foo>::value;
std::is_trivially_copy_constructible<Foo>::value;
std::is_trivially_move_constructible<Foo>::value;

Output

clang++ bug.cpp
bug.cpp:4:5: error: initializer on function does not look like a pure-specifier
    4 |     ~Foo() = {}
      |     ^        ~~
bug.cpp:4:16: error: expected ';' at end of declaration list
    4 |     ~Foo() = {}
      |                ^
      |                ;
1.      bug.cpp:8:1: at annotation token
2.      /usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/type_traits:1217:12: instantiating class definition 'std::is_trivially_constructible<Foo>'
 #0 0x00007f8beef9f876 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xd9f876)
 #1 0x00007f8beef9d8a0 llvm::sys::RunSignalHandlers() (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xd9d8a0)
 #2 0x00007f8beef9ff3b (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xd9ff3b)
 #3 0x00007f8bee05b050 (/lib/x86_64-linux-gnu/libc.so.6+0x3c050)
 #4 0x00007f8bf687a7bd (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xe7a7bd)
 #5 0x00007f8bf687a609 clang::Expr::hasNonTrivialCall(clang::ASTContext const&) const (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xe7a609)
 #6 0x00007f8bf71c4bbb clang::Sema::BuildTypeTrait(clang::TypeTrait, clang::SourceLocation, llvm::ArrayRef<clang::TypeSourceInfo*>, clang::SourceLocation) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x17c4bbb)
 #7 0x00007f8bf751438a (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b1438a)
 #8 0x00007f8bf751fd7c (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b1fd7c)
 #9 0x00007f8bf75277e5 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b277e5)
#10 0x00007f8bf752d9f7 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b2d9f7)
#11 0x00007f8bf752b954 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b2b954)
#12 0x00007f8bf75095a0 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b095a0)
#13 0x00007f8bf750c227 clang::Sema::SubstBaseSpecifiers(clang::CXXRecordDecl*, clang::CXXRecordDecl*, clang::MultiLevelTemplateArgumentList const&) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b0c227)
#14 0x00007f8bf750ca44 clang::Sema::InstantiateClass(clang::SourceLocation, clang::CXXRecordDecl*, clang::CXXRecordDecl*, clang::MultiLevelTemplateArgumentList const&, clang::TemplateSpecializationKind, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b0ca44)
#15 0x00007f8bf750e9a0 clang::Sema::InstantiateClassTemplateSpecialization(clang::SourceLocation, clang::ClassTemplateSpecializationDecl*, clang::TemplateSpecializationKind, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b0e9a0)
#16 0x00007f8bf75bd05e (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1bbd05e)
#17 0x00007f8bf6db47dd clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref<void ()>) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x13b47dd)
#18 0x00007f8bf75ae5e1 clang::Sema::RequireCompleteTypeImpl(clang::SourceLocation, clang::QualType, clang::Sema::CompleteTypeKind, clang::Sema::TypeDiagnoser*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1bae5e1)
#19 0x00007f8bf75add9f clang::Sema::RequireCompleteType(clang::SourceLocation, clang::QualType, clang::Sema::CompleteTypeKind, clang::Sema::TypeDiagnoser&) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1badd9f)
#20 0x00007f8bf6e2b9c8 clang::Sema::RequireCompleteDeclContext(clang::CXXScopeSpec&, clang::DeclContext*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x142b9c8)
#21 0x00007f8bf6f272e4 clang::Sema::getTypeName(clang::IdentifierInfo const&, clang::SourceLocation, clang::Scope*, clang::CXXScopeSpec*, bool, bool, clang::OpaquePtr<clang::QualType>, bool, bool, bool, clang::ImplicitTypenameContext, clang::IdentifierInfo**) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x15272e4)
#22 0x00007f8bf659cf89 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&, clang::Parser::ParsedTemplateInfo const&, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*, clang::ImplicitTypenameContext) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xb9cf89)
#23 0x00007f8bf664d570 clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xc4d570)
#24 0x00007f8bf664d2b3 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xc4d2b3)
#25 0x00007f8bf664c516 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xc4c516)
#26 0x00007f8bf664a94a clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xc4a94a)
#27 0x00007f8bf65835fe clang::ParseAST(clang::Sema&, bool, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xb835fe)
#28 0x00007f8bf83b4025 clang::FrontendAction::Execute() (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x29b4025)
#29 0x00007f8bf832ad74 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x292ad74)
#30 0x00007f8bf842f1ce clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x2a2f1ce)
#31 0x000055b69d298dfa cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/usr/lib/llvm-18/bin/clang+0x12dfa)
#32 0x000055b69d296185 (/usr/lib/llvm-18/bin/clang+0x10185)
#33 0x000055b69d295344 clang_main(int, char**, llvm::ToolContext const&) (/usr/lib/llvm-18/bin/clang+0xf344)
#34 0x000055b69d2a2f16 main (/usr/lib/llvm-18/bin/clang+0x1cf16)
#35 0x00007f8bee04624a (/lib/x86_64-linux-gnu/libc.so.6+0x2724a)
#36 0x00007f8bee046305 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x27305)
#37 0x000055b69d292bb1 _start (/usr/lib/llvm-18/bin/clang+0xcbb1)
clang++: error: unable to execute command: Segmentation fault (core dumped)
clang++: error: clang frontend command failed due to signal (use -v to see invocation)
Debian clang version 18.1.4 (++20240417123804+e6c3289804a6-1~exp1~20240417003947.102)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
@github-actions github-actions bot added the clang Clang issues not falling into any other category label Apr 21, 2024
@EugeneZelenko EugeneZelenko added clang:frontend Language frontend issues, e.g. anything involving "Sema" crash Prefer [crash-on-valid] or [crash-on-invalid] and removed clang Clang issues not falling into any other category labels Apr 21, 2024
@llvmbot
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llvmbot commented Apr 21, 2024

@llvm/issue-subscribers-clang-frontend

Author: None (8080i)

### bug.cpp ```c++ #include <type_traits>

class Foo {
~Foo() = {}
};

// All of these crash clang
std::is_trivially_constructible<Foo>::value;
std::is_trivially_default_constructible<Foo>::value;
std::is_trivially_copy_constructible<Foo>::value;
std::is_trivially_move_constructible<Foo>::value;


### Output
```shell
clang++ bug.cpp
bug.cpp:4:5: error: initializer on function does not look like a pure-specifier
    4 |     ~Foo() = {}
      |     ^        ~~
bug.cpp:4:16: error: expected ';' at end of declaration list
    4 |     ~Foo() = {}
      |                ^
      |                ;
1.      bug.cpp:8:1: at annotation token
2.      /usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/type_traits:1217:12: instantiating class definition 'std::is_trivially_constructible&lt;Foo&gt;'
 #<!-- -->0 0x00007f8beef9f876 llvm::sys::PrintStackTrace(llvm::raw_ostream&amp;, int) (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xd9f876)
 #<!-- -->1 0x00007f8beef9d8a0 llvm::sys::RunSignalHandlers() (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xd9d8a0)
 #<!-- -->2 0x00007f8beef9ff3b (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xd9ff3b)
 #<!-- -->3 0x00007f8bee05b050 (/lib/x86_64-linux-gnu/libc.so.6+0x3c050)
 #<!-- -->4 0x00007f8bf687a7bd (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xe7a7bd)
 #<!-- -->5 0x00007f8bf687a609 clang::Expr::hasNonTrivialCall(clang::ASTContext const&amp;) const (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xe7a609)
 #<!-- -->6 0x00007f8bf71c4bbb clang::Sema::BuildTypeTrait(clang::TypeTrait, clang::SourceLocation, llvm::ArrayRef&lt;clang::TypeSourceInfo*&gt;, clang::SourceLocation) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x17c4bbb)
 #<!-- -->7 0x00007f8bf751438a (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b1438a)
 #<!-- -->8 0x00007f8bf751fd7c (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b1fd7c)
 #<!-- -->9 0x00007f8bf75277e5 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b277e5)
#<!-- -->10 0x00007f8bf752d9f7 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b2d9f7)
#<!-- -->11 0x00007f8bf752b954 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b2b954)
#<!-- -->12 0x00007f8bf75095a0 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b095a0)
#<!-- -->13 0x00007f8bf750c227 clang::Sema::SubstBaseSpecifiers(clang::CXXRecordDecl*, clang::CXXRecordDecl*, clang::MultiLevelTemplateArgumentList const&amp;) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b0c227)
#<!-- -->14 0x00007f8bf750ca44 clang::Sema::InstantiateClass(clang::SourceLocation, clang::CXXRecordDecl*, clang::CXXRecordDecl*, clang::MultiLevelTemplateArgumentList const&amp;, clang::TemplateSpecializationKind, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b0ca44)
#<!-- -->15 0x00007f8bf750e9a0 clang::Sema::InstantiateClassTemplateSpecialization(clang::SourceLocation, clang::ClassTemplateSpecializationDecl*, clang::TemplateSpecializationKind, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b0e9a0)
#<!-- -->16 0x00007f8bf75bd05e (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1bbd05e)
#<!-- -->17 0x00007f8bf6db47dd clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref&lt;void ()&gt;) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x13b47dd)
#<!-- -->18 0x00007f8bf75ae5e1 clang::Sema::RequireCompleteTypeImpl(clang::SourceLocation, clang::QualType, clang::Sema::CompleteTypeKind, clang::Sema::TypeDiagnoser*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1bae5e1)
#<!-- -->19 0x00007f8bf75add9f clang::Sema::RequireCompleteType(clang::SourceLocation, clang::QualType, clang::Sema::CompleteTypeKind, clang::Sema::TypeDiagnoser&amp;) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1badd9f)
#<!-- -->20 0x00007f8bf6e2b9c8 clang::Sema::RequireCompleteDeclContext(clang::CXXScopeSpec&amp;, clang::DeclContext*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x142b9c8)
#<!-- -->21 0x00007f8bf6f272e4 clang::Sema::getTypeName(clang::IdentifierInfo const&amp;, clang::SourceLocation, clang::Scope*, clang::CXXScopeSpec*, bool, bool, clang::OpaquePtr&lt;clang::QualType&gt;, bool, bool, bool, clang::ImplicitTypenameContext, clang::IdentifierInfo**) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x15272e4)
#<!-- -->22 0x00007f8bf659cf89 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&amp;, clang::Parser::ParsedTemplateInfo const&amp;, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*, clang::ImplicitTypenameContext) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xb9cf89)
#<!-- -->23 0x00007f8bf664d570 clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec&amp;, clang::AccessSpecifier) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xc4d570)
#<!-- -->24 0x00007f8bf664d2b3 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xc4d2b3)
#<!-- -->25 0x00007f8bf664c516 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xc4c516)
#<!-- -->26 0x00007f8bf664a94a clang::Parser::ParseTopLevelDecl(clang::OpaquePtr&lt;clang::DeclGroupRef&gt;&amp;, clang::Sema::ModuleImportState&amp;) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xc4a94a)
#<!-- -->27 0x00007f8bf65835fe clang::ParseAST(clang::Sema&amp;, bool, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xb835fe)
#<!-- -->28 0x00007f8bf83b4025 clang::FrontendAction::Execute() (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x29b4025)
#<!-- -->29 0x00007f8bf832ad74 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&amp;) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x292ad74)
#<!-- -->30 0x00007f8bf842f1ce clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x2a2f1ce)
#<!-- -->31 0x000055b69d298dfa cc1_main(llvm::ArrayRef&lt;char const*&gt;, char const*, void*) (/usr/lib/llvm-18/bin/clang+0x12dfa)
#<!-- -->32 0x000055b69d296185 (/usr/lib/llvm-18/bin/clang+0x10185)
#<!-- -->33 0x000055b69d295344 clang_main(int, char**, llvm::ToolContext const&amp;) (/usr/lib/llvm-18/bin/clang+0xf344)
#<!-- -->34 0x000055b69d2a2f16 main (/usr/lib/llvm-18/bin/clang+0x1cf16)
#<!-- -->35 0x00007f8bee04624a (/lib/x86_64-linux-gnu/libc.so.6+0x2724a)
#<!-- -->36 0x00007f8bee046305 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x27305)
#<!-- -->37 0x000055b69d292bb1 _start (/usr/lib/llvm-18/bin/clang+0xcbb1)
clang++: error: unable to execute command: Segmentation fault (core dumped)
clang++: error: clang frontend command failed due to signal (use -v to see invocation)
Debian clang version 18.1.4 (++20240417123804+e6c3289804a6-1~exp1~20240417003947.102)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

@cor3ntin
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@Endilll Want to look at that? It might be easy (But I'm reluctant to put a good first issue tag)

@cor3ntin cor3ntin added crash-on-invalid confirmed Verified by a second party labels Apr 21, 2024
@EugeneZelenko EugeneZelenko removed the crash Prefer [crash-on-valid] or [crash-on-invalid] label Apr 21, 2024
@Endilll Endilll self-assigned this Apr 26, 2024
@Endilll
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Endilll commented Apr 26, 2024

This is a relatively recent regression. We're crashing since Clang 15: https://godbolt.org/z/a9qd4x8Kf

@llvmbot
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llvmbot commented Apr 26, 2024

@llvm/issue-subscribers-c-11

Author: None (8080i)

### bug.cpp ```c++ #include <type_traits>

class Foo {
~Foo() = {}
};

// All of these crash clang
std::is_trivially_constructible<Foo>::value;
std::is_trivially_default_constructible<Foo>::value;
std::is_trivially_copy_constructible<Foo>::value;
std::is_trivially_move_constructible<Foo>::value;


### Output
```shell
clang++ bug.cpp
bug.cpp:4:5: error: initializer on function does not look like a pure-specifier
    4 |     ~Foo() = {}
      |     ^        ~~
bug.cpp:4:16: error: expected ';' at end of declaration list
    4 |     ~Foo() = {}
      |                ^
      |                ;
1.      bug.cpp:8:1: at annotation token
2.      /usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/type_traits:1217:12: instantiating class definition 'std::is_trivially_constructible&lt;Foo&gt;'
 #<!-- -->0 0x00007f8beef9f876 llvm::sys::PrintStackTrace(llvm::raw_ostream&amp;, int) (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xd9f876)
 #<!-- -->1 0x00007f8beef9d8a0 llvm::sys::RunSignalHandlers() (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xd9d8a0)
 #<!-- -->2 0x00007f8beef9ff3b (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xd9ff3b)
 #<!-- -->3 0x00007f8bee05b050 (/lib/x86_64-linux-gnu/libc.so.6+0x3c050)
 #<!-- -->4 0x00007f8bf687a7bd (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xe7a7bd)
 #<!-- -->5 0x00007f8bf687a609 clang::Expr::hasNonTrivialCall(clang::ASTContext const&amp;) const (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xe7a609)
 #<!-- -->6 0x00007f8bf71c4bbb clang::Sema::BuildTypeTrait(clang::TypeTrait, clang::SourceLocation, llvm::ArrayRef&lt;clang::TypeSourceInfo*&gt;, clang::SourceLocation) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x17c4bbb)
 #<!-- -->7 0x00007f8bf751438a (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b1438a)
 #<!-- -->8 0x00007f8bf751fd7c (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b1fd7c)
 #<!-- -->9 0x00007f8bf75277e5 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b277e5)
#<!-- -->10 0x00007f8bf752d9f7 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b2d9f7)
#<!-- -->11 0x00007f8bf752b954 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b2b954)
#<!-- -->12 0x00007f8bf75095a0 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b095a0)
#<!-- -->13 0x00007f8bf750c227 clang::Sema::SubstBaseSpecifiers(clang::CXXRecordDecl*, clang::CXXRecordDecl*, clang::MultiLevelTemplateArgumentList const&amp;) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b0c227)
#<!-- -->14 0x00007f8bf750ca44 clang::Sema::InstantiateClass(clang::SourceLocation, clang::CXXRecordDecl*, clang::CXXRecordDecl*, clang::MultiLevelTemplateArgumentList const&amp;, clang::TemplateSpecializationKind, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b0ca44)
#<!-- -->15 0x00007f8bf750e9a0 clang::Sema::InstantiateClassTemplateSpecialization(clang::SourceLocation, clang::ClassTemplateSpecializationDecl*, clang::TemplateSpecializationKind, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b0e9a0)
#<!-- -->16 0x00007f8bf75bd05e (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1bbd05e)
#<!-- -->17 0x00007f8bf6db47dd clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref&lt;void ()&gt;) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x13b47dd)
#<!-- -->18 0x00007f8bf75ae5e1 clang::Sema::RequireCompleteTypeImpl(clang::SourceLocation, clang::QualType, clang::Sema::CompleteTypeKind, clang::Sema::TypeDiagnoser*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1bae5e1)
#<!-- -->19 0x00007f8bf75add9f clang::Sema::RequireCompleteType(clang::SourceLocation, clang::QualType, clang::Sema::CompleteTypeKind, clang::Sema::TypeDiagnoser&amp;) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1badd9f)
#<!-- -->20 0x00007f8bf6e2b9c8 clang::Sema::RequireCompleteDeclContext(clang::CXXScopeSpec&amp;, clang::DeclContext*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x142b9c8)
#<!-- -->21 0x00007f8bf6f272e4 clang::Sema::getTypeName(clang::IdentifierInfo const&amp;, clang::SourceLocation, clang::Scope*, clang::CXXScopeSpec*, bool, bool, clang::OpaquePtr&lt;clang::QualType&gt;, bool, bool, bool, clang::ImplicitTypenameContext, clang::IdentifierInfo**) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x15272e4)
#<!-- -->22 0x00007f8bf659cf89 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&amp;, clang::Parser::ParsedTemplateInfo const&amp;, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*, clang::ImplicitTypenameContext) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xb9cf89)
#<!-- -->23 0x00007f8bf664d570 clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec&amp;, clang::AccessSpecifier) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xc4d570)
#<!-- -->24 0x00007f8bf664d2b3 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xc4d2b3)
#<!-- -->25 0x00007f8bf664c516 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xc4c516)
#<!-- -->26 0x00007f8bf664a94a clang::Parser::ParseTopLevelDecl(clang::OpaquePtr&lt;clang::DeclGroupRef&gt;&amp;, clang::Sema::ModuleImportState&amp;) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xc4a94a)
#<!-- -->27 0x00007f8bf65835fe clang::ParseAST(clang::Sema&amp;, bool, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xb835fe)
#<!-- -->28 0x00007f8bf83b4025 clang::FrontendAction::Execute() (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x29b4025)
#<!-- -->29 0x00007f8bf832ad74 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&amp;) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x292ad74)
#<!-- -->30 0x00007f8bf842f1ce clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x2a2f1ce)
#<!-- -->31 0x000055b69d298dfa cc1_main(llvm::ArrayRef&lt;char const*&gt;, char const*, void*) (/usr/lib/llvm-18/bin/clang+0x12dfa)
#<!-- -->32 0x000055b69d296185 (/usr/lib/llvm-18/bin/clang+0x10185)
#<!-- -->33 0x000055b69d295344 clang_main(int, char**, llvm::ToolContext const&amp;) (/usr/lib/llvm-18/bin/clang+0xf344)
#<!-- -->34 0x000055b69d2a2f16 main (/usr/lib/llvm-18/bin/clang+0x1cf16)
#<!-- -->35 0x00007f8bee04624a (/lib/x86_64-linux-gnu/libc.so.6+0x2724a)
#<!-- -->36 0x00007f8bee046305 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x27305)
#<!-- -->37 0x000055b69d292bb1 _start (/usr/lib/llvm-18/bin/clang+0xcbb1)
clang++: error: unable to execute command: Segmentation fault (core dumped)
clang++: error: clang frontend command failed due to signal (use -v to see invocation)
Debian clang version 18.1.4 (++20240417123804+e6c3289804a6-1~exp1~20240417003947.102)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

Endilll added a commit to Endilll/llvm-project that referenced this issue Apr 26, 2024
@Endilll
[clang] Fix crash when destructor definition is preceded with '='
b9b17fa 
Fixes llvm#89544
@Endilll Endilll mentioned this issue Apr 26, 2024
Merged
Endilll added a commit that referenced this issue May 1, 2024
@Endilll
[clang] Fix crash when destructor definition is preceded with '=' (#9…
3a3bdd8 
…0220)

Fixes #89544
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c++11 clang:frontend Language frontend issues, e.g. anything involving "Sema" confirmed Verified by a second party crash-on-invalid regression
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[clang] Fix crash when destructor definition is preceded with '=' Endilll/llvm-project
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@cor3ntin @EugeneZelenko @Endilll @llvmbot @8080i