<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/115308>115308</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [clang] Assertion `DD && "queried property of class with no definition"' failed. Crash at HasAccess(clang::Sema&, (anonymous namespace)::EffectiveContext const&, clang::CXXRecordDecl const*, clang::AccessSpecifier, (anonymous namespace)::AccessTarget const&)
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang:frontend,
            crash-on-invalid,
            clang:frontend:fuzzer
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          yijan4845
      </td>
    </tr>
</table>

<pre>
    **This testcase is generated by a fuzzer.**

Compiler Explorer: [https://godbolt.org/z/a4o6eoPb6](https://godbolt.org/z/a4o6eoPb6)

This invalid code will crash on both Clang Trunk and Clang Assertion Trunk.
```cpp
template<typename T>
class S {
protected:
 F();
  class bar;
  class G : public bar {
      bool foo() {
 F();
      }
  };
};
```

It seems that this goes back to clang-3(or earlier).

Stack dump:
```
clang++: /root/llvm-project/clang/include/clang/AST/DeclCXX.h:465: clang::CXXRecordDecl::DefinitionData& clang::CXXRecordDecl::data() const: Assertion `DD && "queried property of class with no definition"' 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>:8:9: at annotation token
2.      <source>:2:1: parsing struct/union/class body 'S'
3.      <source>:7:18: parsing function body 'S::G::foo'
4.      <source>:7:18: in compound statement ('{}')
 #0 0x0000000003bf66c8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3bf66c8)
 #1 0x0000000003bf43cc llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3bf43cc)
 #2 0x0000000003b419c8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x000079e466c42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x000079e466c969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x000079e466c42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x000079e466c287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x000079e466c2871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #8 0x000079e466c39e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #9 0x00000000068fdd9a (anonymous namespace)::ProtectedFriendContext::findFriendship(clang::CXXRecordDecl const*, unsigned int) SemaAccess.cpp:0:0
#10 0x00000000068fda2d (anonymous namespace)::ProtectedFriendContext::findFriendship(clang::CXXRecordDecl const*, unsigned int) SemaAccess.cpp:0:0
#11 0x00000000068ffdd5 HasAccess(clang::Sema&, (anonymous namespace)::EffectiveContext const&, clang::CXXRecordDecl const*, clang::AccessSpecifier, (anonymous namespace)::AccessTarget const&) SemaAccess.cpp:0:0
#12 0x00000000069006f4 IsAccessible(clang::Sema&, (anonymous namespace)::EffectiveContext const&, (anonymous namespace)::AccessTarget&) SemaAccess.cpp:0:0
#13 0x0000000006900c4e CheckEffectiveAccess(clang::Sema&, (anonymous namespace)::EffectiveContext const&, clang::SourceLocation, (anonymous namespace)::AccessTarget&) SemaAccess.cpp:0:0
#14 0x000000000690261c CheckAccess(clang::Sema&, clang::SourceLocation, (anonymous namespace)::AccessTarget&) SemaAccess.cpp:0:0
#15 0x0000000006906596 clang::Sema::CheckLookupAccess(clang::LookupResult const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6906596)
#16 0x000000000691c912 clang::LookupResult::~LookupResult() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x691c912)
#17 0x0000000006a7def4 clang::Sema::ActOnNameClassifiedAsOverloadSet(clang::Scope*, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a7def4)
#18 0x0000000006794957 clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6794957)
#19 0x0000000006794df7 clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, clang::Parser::TypeCastState, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6794df7)
#20 0x0000000006794e89 clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6794e89)
#21 0x00000000067998a9 clang::Parser::ParseExpression(clang::Parser::TypeCastState) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x67998a9)
#22 0x000000000681c2e9 clang::Parser::ParseExprStatement(clang::Parser::ParsedStmtContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x681c2e9)
#23 0x00000000068125ce 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+++0x68125ce)
#24 0x0000000006813520 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6813520)
#25 0x00000000068143e4 clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x68143e4)
#26 0x0000000006815b9a clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6815b9a)
#27 0x00000000067377c0 clang::Parser::ParseLexedMethodDef(clang::Parser::LexedMethod&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x67377c0)
#28 0x000000000673716d clang::Parser::LateParsedClass::ParseLexedMethodDefs() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x673716d)
#29 0x00000000067374ad clang::Parser::ParseLexedMethodDefs(clang::Parser::ParsingClass&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x67374ad)
#30 0x0000000006788c8e clang::Parser::ParseCXXMemberSpecification(clang::SourceLocation, clang::SourceLocation, clang::ParsedAttributes&, unsigned int, clang::Decl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6788c8e)
#31 0x000000000678b2b3 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+++0x678b2b3)
#32 0x000000000675fab0 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+++0x675fab0)
#33 0x000000000682753a clang::Parser::ParseDeclarationAfterTemplate(clang::DeclaratorContext, clang::Parser::ParsedTemplateInfo&, clang::ParsingDeclRAIIObject&, clang::SourceLocation&, clang::ParsedAttributes&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x682753a)
#34 0x0000000006834e5c clang::Parser::ParseTemplateDeclarationOrSpecialization(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::AccessSpecifier) (.part.0) ParseTemplate.cpp:0:0
#35 0x000000000683517a clang::Parser::ParseDeclarationStartingWithTemplate(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x683517a)
#36 0x00000000067667a3 clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x67667a3)
#37 0x00000000067257c7 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x67257c7)
#38 0x000000000672666d clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x672666d)
#39 0x0000000006726b10 clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6726b10)
#40 0x0000000006718b52 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6718b52)
#41 0x00000000045725c8 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x45725c8)
#42 0x000000000482d559 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x482d559)
#43 0x00000000047ac7ce clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x47ac7ce)
#44 0x000000000491335e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x491335e)
#45 0x0000000000ce9aff cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xce9aff)
#46 0x0000000000ce17ba ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#47 0x00000000045b57c9 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
#48 0x0000000003b41e74 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3b41e74)
#49 0x00000000045b5dbf 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
#50 0x000000000457c0ad clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x457c0ad)
#51 0x000000000457d19d 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+++0x457d19d)
#52 0x0000000004584555 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4584555)
#53 0x0000000000ce6999 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xce6999)
#54 0x0000000000bb3494 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xbb3494)
#55 0x000079e466c29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#56 0x000079e466c29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#57 0x0000000000ce126e _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xce126e)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134
```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzkW11z2yq3_jXKDWOPhb4vcuHacXf2yT7t1JlzepdBCNnsyKANKHV6cX77GUBKhPyRpBNlOvvNpI2NYPGsZy0WCwRISrphhFx60ScvWl6gRm25uHykfyMWpmF0kfPi8dKDcw_Ob7dUAkWkwkgSQCXYEEYEUqQA-SNAoGx-_iRiait7s6U3a_9f8F1NKyLA1b6uuCDCC-bAiz5tlaqlF8w9uPLgasOLnFdqysXGg6ufHlyhkMeEf81jL1p6MH19dZj1uze4KXtAFS0A5gUBP2hVASyQ3ALOQM7VFiwqxDbgVjTsHiBWtN_nUhKhKGf2ybQVG8_sL65rW6LIrq6QIl6wUI81YWhHwK0XXNmnuEJSgjXwkk-2oBZcEaxIobUxJWDlwVTjDtoqANhWORIHZZ-BJrBu8opiXeFZMDA_OecVKDm3IntPDzvRP16y7L7qj91D53OncZ_XawUkITsJ1BYpoDTLG040ZHwPFNdg2WYSeDDlAhAkKkqEB7NpX8Za6cpFs6ufqBj0ZaR48JP-1W4DV4Jz5cFVVT3sJrXgfxOsv7b1VpThqilIr2S-vvXgaklwtfj-fbr1gnkYR1qWrRDMvWC--P79G8FcFLqaLVqSkjKqjb9ECnkwfqF-YWoZxjFnUukenv3Hi2fLJfBgrAV5EP7TEEFJAWrBayLUI-Bla90fVG0B46B46t-D0IMJKBGtSNHS9_Xmar6-ArLJd1QBBPJmAwSpuVCa-sFQoWrb5FPMdy1th-xRKRsiPbgyzt9yCNSWtMNE21QJhIkHF6AWpBYcEylJASRvhC3WLZGUHFMTE0TDgMSC1mp60tazqTfLvgq-EWgHkNg0O8KUbO3Ma2PXNnhMSBc8WstOUEeunCg9Oj24yil7Nrx2GTDZFD-QKCchmGzAhGu5qK619EbVjZpKMNlpLsBksk_jCZK7iXxkCu29YEmZIhWYlIxPHojIuST6OZiswWSywXiiOK_wFlHmBcuzeHVlyVAtt1yBSYl5xcWkoGjDuFQUS9uHYdop9oJFS28XSnxNmFMczFMvmGeaM6QAYowrZDxO8XvCbCt4pBX0grlv4ggSkrINkEo0xhcaZnxu1QYgXjwCDyZrDyZWWnBEWqKlpX1xZcOwwfEswAyTz_aPCU-twPCsQMqA5pQ3rABSIUW0jwAz0hId2pKl_tCFfODBYAZm-1n3E-RlHOMUGL83XctHaT98FZQp45W31rXT50oC_bjjUgmCdmbQLgBlykRT3fG7-KYHP832LTwHvz_AHwYYH8O_qAhiTf2FremGocqDacPMdF6AiutexkCrwThooYs29DOcgoX2ZR0hH4h4tPD-QKyodKdpy6RTZ8GZIns11VNqMJ-Zf09dBG0XSUbCOMYhjOCsVa2iuQdX-zS-i8NJRVmzn2xYYx_gqeTT2AA3TRzYoSszi7MSg1ptBUHF3b1OEN7UgWnvdBANQYdJDDbScPFW8GESO7JjVzZMkzIAKNfR_02STUNHcnIg2c_fLNPPHZmpKzPISBa_TaZp4sjM-l4Xp2VRZEjLRIyzxx1vJNBJmKzNuM668d6mXStBCStal2vjEWVtsdzS2oPpqcm-ndx1krsAT-Otdek12aE51jPjoSPrgT0bokaw-P1R-wPUZVFE4A8kbRu3Vy2rDZgv6HVVlgQr-kBajTqIpu2r9OhVslDWNcG0NGnmi93bFrdIbEi_65fZcOJdnM1mcRmC65YMmldkFELeoM0r9QiGeuCQgMWW4PsnIB9j4LWZ9m84RjbZHUPZcKAsjH1slX1Bxw_GGQ1wxlHmrDsMMjssNPgbzu-b-pgK9sk3IpvKde93zghajM9Lbhj4sauEjzMfghPYbMn_OUXtsvW9gRocDtDEAYqSgpThcbbnWH1h_412ZKGTYh1jirn88kBExVGx1uZ1_AfzmhwGqat9LUzp-ytnsTvKpY5ySRZmUdJH8xUJabZius8LJJWGqMOY9u_0RGVdz3z_L8oKrWLOefX8dzhs-k1vH2vTzVrn8YdNR6HGau5Qkw2pKcqRqfm9-ChKhw84G_JB0uwsH3OzbagXYq9hZaDlKCqRNHNU8gcqZSk6r9JvoojG6SjiphupjyF5WZF1t04-rYv5XKzVTnUZ5Qj6WLiOPsFAHxhhclafJ12-CJ0BImGm33mpiJgrJWjeKCKdtft6h6rqfwhWXHjBoh-X1a7LHQPYeMHV-Wh1hKKzCcEw3tv2fZBHexvWGMMMmmXHDOHADIFeUr_dDL8L72NwFvS3DDRn0YCzMCDh-Wmj3bd64u4TLx49mNroPgZmDcnBHA8wR3mGzmJetft2Q8y9NmbP-7i3Ox5js6CRPFor4mjqJnNJkCT4vEffkD0p_iJqy4slKU9Hyl69kbSxYB1t0qE2flyc0uYGKWLHjMlOT6ooR8qsLToHfjaEH6KT8E8gPVObso3VdDRzhMjRJxhkSGmK0_Oz1uL797_ILiei3ZPoYlV6dkH52ocnZhZ3Y8dp8TRmR6DLsOHQNci-0hzmwXm6tDl72zd9mhS_b9Mvfk9Yl1m_liqtuBb8minntn2Ne81Kflj_yB7TC-l91_fxaeyDJn_LvmMeN6dMohLl50Nlb8Z_0l8eTgqj8fzr_B6ESM33DT22h3i9qyuKqbpt3-CPmBdbyh2bDPJimETB-Yl6mAx3pB6aRdfi4mWSXmOcNvxqsd_m19dfcvsC-aW9slclvue9YIQkwpDsWGGQFgchifBZujq2etb4YmM-qujPI0H_JYOMxdy0RkJNtc8BB_jRfchgkOoGkZ-82hvXCglF2eZ_qdr-mlP-Egcj-IdR2_EPN51O4jhB5yc2d630oX7wco0PWUhZkhwWB6k6jBJ8fv_taq-IYKg6yeZ7sNELbXYiG4cOo61DxyDXh3F8Ote3Y5fXN-SBVDap6_PwpUb_NOSrGizAdcXPgjf1N1IeXX4_73T_xYumIte7motun2uctMSo6fCQDXnI_fNpyYoKqf4lZOS-kw-EgxWHn-YRPCDDHG078ebK3UoeAbOB5GB20v4wSmCEU-dVLi_IZ8LmZoPBFl3tCW4UaYtGWZ-2QBykTgYcprCIImdXdSV0UGbFEagjgbQYHJBOShgmCCfuVml3rvaaSYUYJscZPa3VKL7c4nQUcbKqMPODICLuizED-VmfB35svXyg7ygRusXnKOCkQzNMMlSWAGP_boeouwc6FwI9msCywFskns8r6ECzAG4ZXIAHTotx9LAoHTXigRp-kiPQkb_wb02kOL6hqxdHR3Uysea5iZZx-L4_A4WgD0QcTTbDxA0beZTgzBDTk9sdJ7wThlvztDvNfGWrYFRVOcL3dyVzA77tu_Whhb_gux1ixXBQH7WhVG09Xuvekeagx48SlG3aacQa-KnB3R3e733ffsmRpPhOmuoti05lXXCnBKJKdo8H4lBV6TFhd9bb57rKfPC2sDt6rH9hUqFdXiBzPrKjCqbd2cA_eX7cHunwRB9Jwp4pjp3bs0--NWyNSlI9OnSeN90YhxQNYsfzs6GLFXkJ_pNdZLAkPOUL0WwwpeOZu5HrEGdshw5mzI5NJ5gPGuoKpw4Inak6d5Kdnm7vnEBotfsOFQ1TncLP3szLnzyXp0n5k-c3VLqnps6F5ic_qBHVLnC4B3yWx9ZZPoRNTZbDppuORWkYRdEp5MveZydxOJIxnLLCB7I5Qjpr6HH4CwYTe5xlbTrbZSgdfhNW5m1QeHnafvecRCNzoDu54SzPgzALgQb93n1b0U7fgyPaMCuyN54rN00cmcOj2RkJZ-DuTje7kwoJdddT7tW9kNDtJRlmcjAmwMp_f5tp4U-99x8Hc0CE4OLpMhUo2xUGwO2IsJeW7KUmsqfKXsDzg1DDbCQBkwegOJCEANpL-7PBzUFBVCOYuTCnGw9uil0Ul0GRBRm6IJd-EsyyFKZxeLG9hHGRh1kcZGXgFzgooyhASZDHaYFmuY_IBb2EMxj6_izx9aownOYIZnEZkDwo8ygJYi-ckR2i1VSPlSkXmwtzVerS96Ngll5UKCeVNLcnIeyCQ0eCube10A_MzR7OJu0txOcHwxY6W_r5U5sJetHyQlyae1p5s5FeOKuoVPIZiKKqMhc3rZRoOcp1M3tNAyD1rz3xfdGI6vLXb8y1nvBwCf8_AAD__5SvLdw">