[clang++] Assertion `Access != AS_none && "Access specifier is AS_none inside a record decl"' failed in clang::Decl::AccessDeclContextCheck() const

[yijan4845]

This testcase is generated by a fuzzer.

Compiler Explorer: https://godbolt.org/z/rv1h188aq

This invalid code will crash on Clang Assertion Trunk, it seems that this goes back to clang-3.1:

class C {
    enum E { e1=0 };
    void fun1(int, enum E;);
};

Stack dump:

clang++: /root/llvm-project/clang/lib/AST/DeclBase.cpp:1106: bool clang::Decl::AccessDeclContextCheck() const: Assertion `Access != AS_none && "Access specifier is AS_none inside a record decl"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics <source>
1.	<source>:3:26: current parser token ';'
2.	<source>:1:1: parsing struct/union/class body 'C'
 #0 0x0000000003ba9d48 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3ba9d48)
 #1 0x0000000003ba7a0c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3ba7a0c)
 #2 0x0000000003af4c68 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x000071deb5042520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x000071deb50969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x000071deb5042476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x000071deb50287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x000071deb502871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #8 0x000071deb5039e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #9 0x0000000007a353c0 clang::Decl::AccessDeclContextCheck() const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7a353c0)
#10 0x000000000681e85a clang::Sema::SetMemberAccessSpecifier(clang::NamedDecl*, clang::NamedDecl*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x681e85a)
#11 0x00000000069e7375 clang::Sema::ActOnTag(clang::Scope*, unsigned int, clang::TagUseKind, clang::SourceLocation, clang::CXXScopeSpec&, clang::IdentifierInfo*, clang::SourceLocation, clang::ParsedAttributesView const&, clang::AccessSpecifier, clang::SourceLocation, llvm::MutableArrayRef<clang::TemplateParameterList*>, bool&, bool&, clang::SourceLocation, bool, clang::ActionResult<clang::OpaquePtr<clang::QualType>, false>, bool, bool, clang::Sema::OffsetOfKind, clang::SkipBodyInfo*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x69e7375)
#12 0x000000000668acf8 clang::Parser::ParseEnumSpecifier(clang::SourceLocation, clang::DeclSpec&, clang::Parser::ParsedTemplateInfo const&, clang::AccessSpecifier, clang::Parser::DeclSpecContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x668acf8)
#13 0x0000000006687a76 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&, clang::Parser::ParsedTemplateInfo&, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*, clang::ImplicitTypenameContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6687a76)
#14 0x000000000668e0d7 clang::Parser::ParseParameterDeclarationClause(clang::DeclaratorContext, clang::ParsedAttributes&, llvm::SmallVectorImpl<clang::DeclaratorChunk::ParamInfo>&, clang::SourceLocation&, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x668e0d7)
#15 0x000000000668f438 clang::Parser::ParseFunctionDeclarator(clang::Declarator&, clang::ParsedAttributes&, clang::BalancedDelimiterTracker&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x668f438)
#16 0x000000000669454f clang::Parser::ParseDirectDeclarator(clang::Declarator&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x669454f)
#17 0x0000000006681586 clang::Parser::ParseDeclaratorInternal(clang::Declarator&, void (clang::Parser::*)(clang::Declarator&)) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6681586)
#18 0x00000000067b6251 clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x67b6251)
#19 0x0000000006670baf clang::Parser::ParseDeclarator(clang::Declarator&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6670baf)
#20 0x00000000066a5745 clang::Parser::ParseCXXMemberDeclaratorBeforeInitializer(clang::Declarator&, clang::VirtSpecifiers&, clang::ActionResult<clang::Expr*, true>&, clang::Parser::LateParsedAttrList&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66a5745)
#21 0x00000000066ac7c0 clang::Parser::ParseCXXClassMemberDeclaration(clang::AccessSpecifier, clang::ParsedAttributes&, clang::Parser::ParsedTemplateInfo&, clang::ParsingDeclRAIIObject*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66ac7c0)
#22 0x00000000066ae4b1 clang::Parser::ParseCXXClassMemberDeclarationWithPragmas(clang::AccessSpecifier&, clang::ParsedAttributes&, clang::TypeSpecifierType, clang::Decl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66ae4b1)
#23 0x00000000066afff7 clang::Parser::ParseCXXMemberSpecification(clang::SourceLocation, clang::SourceLocation, clang::ParsedAttributes&, unsigned int, clang::Decl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66afff7)
#24 0x00000000066b27a3 clang::Parser::ParseClassSpecifier(clang::tok::TokenKind, clang::SourceLocation, clang::DeclSpec&, clang::Parser::ParsedTemplateInfo&, clang::AccessSpecifier, bool, clang::Parser::DeclSpecContext, clang::ParsedAttributes&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66b27a3)
#25 0x0000000006686fa0 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&, clang::Parser::ParsedTemplateInfo&, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*, clang::ImplicitTypenameContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6686fa0)
#26 0x0000000006644494 clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6644494)
#27 0x0000000006644efe clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6644efe)
#28 0x000000000664c693 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x664c693)
#29 0x000000000664d57d clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x664d57d)
#30 0x000000000664da20 clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x664da20)
#31 0x000000000663fa62 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x663fa62)
#32 0x0000000004502248 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4502248)
#33 0x00000000047bbb49 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x47bbb49)
#34 0x000000000473a6ee clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x473a6ee)
#35 0x00000000048a16be clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48a16be)
#36 0x0000000000cdb8ef cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcdb8ef)
#37 0x0000000000cd35fa ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#38 0x0000000004545f19 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
#39 0x0000000003af5114 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3af5114)
#40 0x000000000454650f 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
#41 0x000000000450be4d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x450be4d)
#42 0x000000000450cf3d 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+++0x450cf3d)
#43 0x0000000004514865 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4514865)
#44 0x0000000000cd87bf clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcd87bf)
#45 0x0000000000ba7d14 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xba7d14)
#46 0x000071deb5029d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#47 0x000071deb5029e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#48 0x0000000000cd30ae _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcd30ae)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134

[llvmbot]

@llvm/issue-subscribers-clang-frontend

Author: Yihan Yang (yijan4845)

**This testcase is generated by a fuzzer.**

Compiler Explorer: https://godbolt.org/z/rv1h188aq

This invalid code will crash on Clang Assertion Trunk, it seems that this goes back to clang-3.1:

class C {
    enum E { e1=0 };
    void fun1(int, enum E;);
};

Stack dump:

clang++: /root/llvm-project/clang/lib/AST/DeclBase.cpp:1106: bool clang::Decl::AccessDeclContextCheck() const: Assertion `Access != AS_none && "Access specifier is AS_none inside a record decl"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics <source>
1.	<source>:3:26: current parser token ';'
2.	<source>:1:1: parsing struct/union/class body 'C'
 #<!-- -->0 0x0000000003ba9d48 llvm::sys::PrintStackTrace(llvm::raw_ostream&amp;, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3ba9d48)
 #<!-- -->1 0x0000000003ba7a0c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3ba7a0c)
 #<!-- -->2 0x0000000003af4c68 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #<!-- -->3 0x000071deb5042520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #<!-- -->4 0x000071deb50969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #<!-- -->5 0x000071deb5042476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #<!-- -->6 0x000071deb50287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #<!-- -->7 0x000071deb502871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #<!-- -->8 0x000071deb5039e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #<!-- -->9 0x0000000007a353c0 clang::Decl::AccessDeclContextCheck() const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7a353c0)
#<!-- -->10 0x000000000681e85a clang::Sema::SetMemberAccessSpecifier(clang::NamedDecl*, clang::NamedDecl*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x681e85a)
#<!-- -->11 0x00000000069e7375 clang::Sema::ActOnTag(clang::Scope*, unsigned int, clang::TagUseKind, clang::SourceLocation, clang::CXXScopeSpec&amp;, clang::IdentifierInfo*, clang::SourceLocation, clang::ParsedAttributesView const&amp;, clang::AccessSpecifier, clang::SourceLocation, llvm::MutableArrayRef&lt;clang::TemplateParameterList*&gt;, bool&amp;, bool&amp;, clang::SourceLocation, bool, clang::ActionResult&lt;clang::OpaquePtr&lt;clang::QualType&gt;, false&gt;, bool, bool, clang::Sema::OffsetOfKind, clang::SkipBodyInfo*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x69e7375)
#<!-- -->12 0x000000000668acf8 clang::Parser::ParseEnumSpecifier(clang::SourceLocation, clang::DeclSpec&amp;, clang::Parser::ParsedTemplateInfo const&amp;, clang::AccessSpecifier, clang::Parser::DeclSpecContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x668acf8)
#<!-- -->13 0x0000000006687a76 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&amp;, clang::Parser::ParsedTemplateInfo&amp;, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*, clang::ImplicitTypenameContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6687a76)
#<!-- -->14 0x000000000668e0d7 clang::Parser::ParseParameterDeclarationClause(clang::DeclaratorContext, clang::ParsedAttributes&amp;, llvm::SmallVectorImpl&lt;clang::DeclaratorChunk::ParamInfo&gt;&amp;, clang::SourceLocation&amp;, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x668e0d7)
#<!-- -->15 0x000000000668f438 clang::Parser::ParseFunctionDeclarator(clang::Declarator&amp;, clang::ParsedAttributes&amp;, clang::BalancedDelimiterTracker&amp;, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x668f438)
#<!-- -->16 0x000000000669454f clang::Parser::ParseDirectDeclarator(clang::Declarator&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x669454f)
#<!-- -->17 0x0000000006681586 clang::Parser::ParseDeclaratorInternal(clang::Declarator&amp;, void (clang::Parser::*)(clang::Declarator&amp;)) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6681586)
#<!-- -->18 0x00000000067b6251 clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref&lt;void ()&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x67b6251)
#<!-- -->19 0x0000000006670baf clang::Parser::ParseDeclarator(clang::Declarator&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6670baf)
#<!-- -->20 0x00000000066a5745 clang::Parser::ParseCXXMemberDeclaratorBeforeInitializer(clang::Declarator&amp;, clang::VirtSpecifiers&amp;, clang::ActionResult&lt;clang::Expr*, true&gt;&amp;, clang::Parser::LateParsedAttrList&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66a5745)
#<!-- -->21 0x00000000066ac7c0 clang::Parser::ParseCXXClassMemberDeclaration(clang::AccessSpecifier, clang::ParsedAttributes&amp;, clang::Parser::ParsedTemplateInfo&amp;, clang::ParsingDeclRAIIObject*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66ac7c0)
#<!-- -->22 0x00000000066ae4b1 clang::Parser::ParseCXXClassMemberDeclarationWithPragmas(clang::AccessSpecifier&amp;, clang::ParsedAttributes&amp;, clang::TypeSpecifierType, clang::Decl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66ae4b1)
#<!-- -->23 0x00000000066afff7 clang::Parser::ParseCXXMemberSpecification(clang::SourceLocation, clang::SourceLocation, clang::ParsedAttributes&amp;, unsigned int, clang::Decl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66afff7)
#<!-- -->24 0x00000000066b27a3 clang::Parser::ParseClassSpecifier(clang::tok::TokenKind, clang::SourceLocation, clang::DeclSpec&amp;, clang::Parser::ParsedTemplateInfo&amp;, clang::AccessSpecifier, bool, clang::Parser::DeclSpecContext, clang::ParsedAttributes&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66b27a3)
#<!-- -->25 0x0000000006686fa0 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&amp;, clang::Parser::ParsedTemplateInfo&amp;, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*, clang::ImplicitTypenameContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6686fa0)
#<!-- -->26 0x0000000006644494 clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec&amp;, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6644494)
#<!-- -->27 0x0000000006644efe clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6644efe)
#<!-- -->28 0x000000000664c693 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x664c693)
#<!-- -->29 0x000000000664d57d clang::Parser::ParseTopLevelDecl(clang::OpaquePtr&lt;clang::DeclGroupRef&gt;&amp;, clang::Sema::ModuleImportState&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x664d57d)
#<!-- -->30 0x000000000664da20 clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr&lt;clang::DeclGroupRef&gt;&amp;, clang::Sema::ModuleImportState&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x664da20)
#<!-- -->31 0x000000000663fa62 clang::ParseAST(clang::Sema&amp;, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x663fa62)
#<!-- -->32 0x0000000004502248 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4502248)
#<!-- -->33 0x00000000047bbb49 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x47bbb49)
#<!-- -->34 0x000000000473a6ee clang::CompilerInstance::ExecuteAction(clang::FrontendAction&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x473a6ee)
#<!-- -->35 0x00000000048a16be clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48a16be)
#<!-- -->36 0x0000000000cdb8ef cc1_main(llvm::ArrayRef&lt;char const*&gt;, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcdb8ef)
#<!-- -->37 0x0000000000cd35fa ExecuteCC1Tool(llvm::SmallVectorImpl&lt;char const*&gt;&amp;, llvm::ToolContext const&amp;) driver.cpp:0:0
#<!-- -->38 0x0000000004545f19 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
#<!-- -->39 0x0000000003af5114 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref&lt;void ()&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3af5114)
#<!-- -->40 0x000000000454650f 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
#<!-- -->41 0x000000000450be4d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&amp;, clang::driver::Command const*&amp;, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x450be4d)
#<!-- -->42 0x000000000450cf3d 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+++0x450cf3d)
#<!-- -->43 0x0000000004514865 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+++0x4514865)
#<!-- -->44 0x0000000000cd87bf clang_main(int, char**, llvm::ToolContext const&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcd87bf)
#<!-- -->45 0x0000000000ba7d14 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xba7d14)
#<!-- -->46 0x000071deb5029d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#<!-- -->47 0x000071deb5029e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#<!-- -->48 0x0000000000cd30ae _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcd30ae)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134

[shafik]

This is likely similar to: #97230 Fix here: https://github.com/llvm/llvm-project/pull/97860/files

we are calling setAccess but we should be checking the object someone before.

[llvmbot]

Hi!

This issue may be a good introductory issue for people new to working on LLVM. If you would like to work on this issue, your first steps are:

1. Check that no other contributor has already been assigned to this issue. If you believe that no one is actually working on it despite an assignment, ping the person. After one week without a response, the assignee may be changed.
2. In the comments of this issue, request for it to be assigned to you, or just create a pull request after following the steps below. Mention this issue in the description of the pull request.
3. Fix the issue locally.
4. Run the test suite locally. Remember that the subdirectories under test/ create fine-grained testing targets, so you can e.g. use make check-clang-ast to only run Clang's AST tests.
5. Create a Git commit.
6. Run git clang-format HEAD~1 to format your changes.
7. Open a pull request to the upstream repository on GitHub. Detailed instructions can be found in GitHub's documentation. Mention this issue in the description of the pull request.

If you have any further questions about this issue, don't hesitate to ask via a comment in the thread below.

[llvmbot]

@llvm/issue-subscribers-good-first-issue

Author: Yihan Yang (yijan4845)

**This testcase is generated by a fuzzer.**

Compiler Explorer: https://godbolt.org/z/rv1h188aq

This invalid code will crash on Clang Assertion Trunk, it seems that this goes back to clang-3.1:

class C {
    enum E { e1=0 };
    void fun1(int, enum E;);
};

Stack dump:

clang++: /root/llvm-project/clang/lib/AST/DeclBase.cpp:1106: bool clang::Decl::AccessDeclContextCheck() const: Assertion `Access != AS_none && "Access specifier is AS_none inside a record decl"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics <source>
1.	<source>:3:26: current parser token ';'
2.	<source>:1:1: parsing struct/union/class body 'C'
 #<!-- -->0 0x0000000003ba9d48 llvm::sys::PrintStackTrace(llvm::raw_ostream&amp;, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3ba9d48)
 #<!-- -->1 0x0000000003ba7a0c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3ba7a0c)
 #<!-- -->2 0x0000000003af4c68 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #<!-- -->3 0x000071deb5042520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #<!-- -->4 0x000071deb50969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #<!-- -->5 0x000071deb5042476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #<!-- -->6 0x000071deb50287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #<!-- -->7 0x000071deb502871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #<!-- -->8 0x000071deb5039e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #<!-- -->9 0x0000000007a353c0 clang::Decl::AccessDeclContextCheck() const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7a353c0)
#<!-- -->10 0x000000000681e85a clang::Sema::SetMemberAccessSpecifier(clang::NamedDecl*, clang::NamedDecl*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x681e85a)
#<!-- -->11 0x00000000069e7375 clang::Sema::ActOnTag(clang::Scope*, unsigned int, clang::TagUseKind, clang::SourceLocation, clang::CXXScopeSpec&amp;, clang::IdentifierInfo*, clang::SourceLocation, clang::ParsedAttributesView const&amp;, clang::AccessSpecifier, clang::SourceLocation, llvm::MutableArrayRef&lt;clang::TemplateParameterList*&gt;, bool&amp;, bool&amp;, clang::SourceLocation, bool, clang::ActionResult&lt;clang::OpaquePtr&lt;clang::QualType&gt;, false&gt;, bool, bool, clang::Sema::OffsetOfKind, clang::SkipBodyInfo*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x69e7375)
#<!-- -->12 0x000000000668acf8 clang::Parser::ParseEnumSpecifier(clang::SourceLocation, clang::DeclSpec&amp;, clang::Parser::ParsedTemplateInfo const&amp;, clang::AccessSpecifier, clang::Parser::DeclSpecContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x668acf8)
#<!-- -->13 0x0000000006687a76 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&amp;, clang::Parser::ParsedTemplateInfo&amp;, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*, clang::ImplicitTypenameContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6687a76)
#<!-- -->14 0x000000000668e0d7 clang::Parser::ParseParameterDeclarationClause(clang::DeclaratorContext, clang::ParsedAttributes&amp;, llvm::SmallVectorImpl&lt;clang::DeclaratorChunk::ParamInfo&gt;&amp;, clang::SourceLocation&amp;, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x668e0d7)
#<!-- -->15 0x000000000668f438 clang::Parser::ParseFunctionDeclarator(clang::Declarator&amp;, clang::ParsedAttributes&amp;, clang::BalancedDelimiterTracker&amp;, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x668f438)
#<!-- -->16 0x000000000669454f clang::Parser::ParseDirectDeclarator(clang::Declarator&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x669454f)
#<!-- -->17 0x0000000006681586 clang::Parser::ParseDeclaratorInternal(clang::Declarator&amp;, void (clang::Parser::*)(clang::Declarator&amp;)) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6681586)
#<!-- -->18 0x00000000067b6251 clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref&lt;void ()&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x67b6251)
#<!-- -->19 0x0000000006670baf clang::Parser::ParseDeclarator(clang::Declarator&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6670baf)
#<!-- -->20 0x00000000066a5745 clang::Parser::ParseCXXMemberDeclaratorBeforeInitializer(clang::Declarator&amp;, clang::VirtSpecifiers&amp;, clang::ActionResult&lt;clang::Expr*, true&gt;&amp;, clang::Parser::LateParsedAttrList&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66a5745)
#<!-- -->21 0x00000000066ac7c0 clang::Parser::ParseCXXClassMemberDeclaration(clang::AccessSpecifier, clang::ParsedAttributes&amp;, clang::Parser::ParsedTemplateInfo&amp;, clang::ParsingDeclRAIIObject*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66ac7c0)
#<!-- -->22 0x00000000066ae4b1 clang::Parser::ParseCXXClassMemberDeclarationWithPragmas(clang::AccessSpecifier&amp;, clang::ParsedAttributes&amp;, clang::TypeSpecifierType, clang::Decl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66ae4b1)
#<!-- -->23 0x00000000066afff7 clang::Parser::ParseCXXMemberSpecification(clang::SourceLocation, clang::SourceLocation, clang::ParsedAttributes&amp;, unsigned int, clang::Decl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66afff7)
#<!-- -->24 0x00000000066b27a3 clang::Parser::ParseClassSpecifier(clang::tok::TokenKind, clang::SourceLocation, clang::DeclSpec&amp;, clang::Parser::ParsedTemplateInfo&amp;, clang::AccessSpecifier, bool, clang::Parser::DeclSpecContext, clang::ParsedAttributes&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66b27a3)
#<!-- -->25 0x0000000006686fa0 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&amp;, clang::Parser::ParsedTemplateInfo&amp;, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*, clang::ImplicitTypenameContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6686fa0)
#<!-- -->26 0x0000000006644494 clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec&amp;, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6644494)
#<!-- -->27 0x0000000006644efe clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6644efe)
#<!-- -->28 0x000000000664c693 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x664c693)
#<!-- -->29 0x000000000664d57d clang::Parser::ParseTopLevelDecl(clang::OpaquePtr&lt;clang::DeclGroupRef&gt;&amp;, clang::Sema::ModuleImportState&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x664d57d)
#<!-- -->30 0x000000000664da20 clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr&lt;clang::DeclGroupRef&gt;&amp;, clang::Sema::ModuleImportState&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x664da20)
#<!-- -->31 0x000000000663fa62 clang::ParseAST(clang::Sema&amp;, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x663fa62)
#<!-- -->32 0x0000000004502248 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4502248)
#<!-- -->33 0x00000000047bbb49 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x47bbb49)
#<!-- -->34 0x000000000473a6ee clang::CompilerInstance::ExecuteAction(clang::FrontendAction&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x473a6ee)
#<!-- -->35 0x00000000048a16be clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48a16be)
#<!-- -->36 0x0000000000cdb8ef cc1_main(llvm::ArrayRef&lt;char const*&gt;, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcdb8ef)
#<!-- -->37 0x0000000000cd35fa ExecuteCC1Tool(llvm::SmallVectorImpl&lt;char const*&gt;&amp;, llvm::ToolContext const&amp;) driver.cpp:0:0
#<!-- -->38 0x0000000004545f19 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
#<!-- -->39 0x0000000003af5114 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref&lt;void ()&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3af5114)
#<!-- -->40 0x000000000454650f 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
#<!-- -->41 0x000000000450be4d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&amp;, clang::driver::Command const*&amp;, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x450be4d)
#<!-- -->42 0x000000000450cf3d 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+++0x450cf3d)
#<!-- -->43 0x0000000004514865 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+++0x4514865)
#<!-- -->44 0x0000000000cd87bf clang_main(int, char**, llvm::ToolContext const&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcd87bf)
#<!-- -->45 0x0000000000ba7d14 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xba7d14)
#<!-- -->46 0x000071deb5029d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#<!-- -->47 0x000071deb5029e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#<!-- -->48 0x0000000000cd30ae _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcd30ae)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134