<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/132256>132256</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [clang] Crash with official test `Parser/cxx0x-attributes.cpp` and default template argument
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang
      </td>
    </tr>

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

    <tr>
      <th>Reporter</th>
      <td>
          Rush10233
      </td>
    </tr>
</table>

<pre>
    Extended from [https://github.com/llvm/llvm-project/blob/main/clang/test/Parser/cxx0x-attributes.cpp](https://github.com/llvm/llvm-project/blob/main/clang/test/Parser/cxx0x-attributes.cpp).

The crash came when I was trying to add some useless template arguments with default values to the code.

Please see [https://godbolt.org/z/hYPEKhzMc](https://godbolt.org/z/hYPEKhzMc)


Stack Dump:

```
0.      Program arguments: /opt/compiler-explorer/clang-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>:312:41: current parser token '{'
2.      <source>:291:13: parsing function body 'baz'
3.      <source>:291:13: in compound statement ('{}')
 #0 0x0000000003b7abe8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3b7abe8)
 #1 0x0000000003b78d2c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3b78d2c)
 #2 0x0000000003ac85a8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007a5387e42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x0000000006fc7404 clang::ASTContext::getElaboratedType(clang::ElaboratedTypeKeyword, clang::NestedNameSpecifier*, clang::QualType, clang::TagDecl*) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6fc7404)
 #5 0x00000000065084a6 clang::Sema::BuildStdInitializerList(clang::QualType, clang::SourceLocation) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x65084a6)
 #6 0x0000000006bfef42 clang::Sema::DeduceAutoType(clang::TypeLoc, clang::Expr*, clang::QualType&, clang::sema::TemplateDeductionInfo&, bool, bool, clang::TemplateSpecCandidateSet*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6bfef42)
 #7 0x0000000006a61abf FinishForRangeVarDecl(clang::Sema&, clang::VarDecl*, clang::Expr*, clang::SourceLocation, int) SemaStmt.cpp:0:0
 #8 0x0000000006a77caa clang::Sema::ActOnCXXForRangeStmt(clang::Scope*, clang::SourceLocation, clang::SourceLocation, clang::Stmt*, clang::Stmt*, clang::SourceLocation, clang::Expr*, clang::SourceLocation, clang::Sema::BuildForRangeKind, llvm::ArrayRef<clang::MaterializeTemporaryExpr*>) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6a77caa)
 #9 0x00000000061ed100 clang::Parser::ParseForStatement(clang::SourceLocation*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x61ed100)
#10 0x00000000061e94c4 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x61e94c4)
#11 0x00000000061ea69e clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x61ea69e)
#12 0x00000000061f30bd clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x61f30bd)
#13 0x00000000061f3afa clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x61f3afa)
#14 0x00000000060e1ee6 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x60e1ee6)
#15 0x000000000612cfdf clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::Parser::ParsedTemplateInfo&, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x612cfdf)
#16 0x00000000060da427 clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x60da427)
#17 0x00000000060db23e clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x60db23e)
#18 0x00000000060e4f3a clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x60e4f3a)
#19 0x00000000060e67d8 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x60e67d8)
#20 0x00000000060d4b5a clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x60d4b5a)
#21 0x00000000044f8d8d clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x44f8d8d)
#22 0x00000000047ddc31 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x47ddc31)
#23 0x000000000475c1bb clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x475c1bb)
#24 0x00000000048cddb3 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x48cddb3)
#25 0x0000000000d65be1 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0xd65be1)
#26 0x0000000000d5e3dd ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#27 0x0000000004546089 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
#28 0x0000000003ac89c3 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3ac89c3)
#29 0x00000000045462a9 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
#30 0x00000000045095cd clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x45095cd)
#31 0x000000000450a591 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x450a591)
#32 0x000000000451492c clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x451492c)
#33 0x0000000000d629b1 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0xd629b1)
#34 0x0000000000c23264 main (/opt/compiler-explorer/clang-trunk/bin/clang+++0xc23264)
#35 0x00007a5387e29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#36 0x00007a5387e29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#37 0x0000000000d5de75 _start (/opt/compiler-explorer/clang-trunk/bin/clang+++0xd5de75)
clang++: error: clang frontend command failed with exit code 139 (use -v to see invocation)
Compiler returned: 139
```
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzkWtty2zjSfhr6BkUVCR5EXviClq35PZOZ5I9cU7NXKhBoStxQgBYAHTlPvwWCEg86xDPLSW3VppJYJoHur79udDcEEKXKDQe4d6IHJ3q8I7XeCnn_uVZb38NBcJcL9nb_dNDAGTBUSLFDTvSw1XqvnCBz8NLBy02pt3U-o2Ln4GVVvR5_uHsp_glUO3iZVyJ38HJHSu7gJa0I3zh4qUGZl5-IVCDN88PBO7hEa1nmtQY1o_u9Ez06OPmRCnE6c7zM8bKXLSAqidoiSnaAvm6Bo2f0lSik5VvJN0gLRBhDSuwA1QoqUApp2O0rogERual3wLVCX0u9RQwKUlcavZKqBmWmaiNeMGi1faqAKEAK4ALDguWi0jMhjRXfHLzc_uPT0y_bb7_Si_zcGI5Tq87xspUm9At6rHd7M9M-jb32r5d5M8dLP0mxkWTXWeMEGXLwUuwNkVTs9mUF0oXDvhLScmq4drWs-Rfjhz7_Dw5-QO6GfSWycEPkbpArjDBiWF-KWu9rPVPI3RlnItc9JLFL1M5Vb1yTgxM8llxDhdyCC_cVZC4UmPfIXSHX3VDqaiEqujU-Dx5vgjSDFSd7tRUauQUVlZAuK8mGC6VLqqyOxvmDx06wUKKWFJzgyfEy31A0eBZkgY-dIAt9QxStpQSu0b4JOKTFF-DIwXNn_mD-9zJ8QQBOzVw_MALMRBNpRc2pLgVHZj0aCTn5ZiUE35FQcmQIEDVnSGmiwXgROThpYcwfzYcmKpCDAw95B-_4J8jnJIcENUssyJwgU2_KfvgkS66bAHqRhIKDk26QJF_XQmkJZOfg2MELVHLt4NRq_euh4-AH79Bi6hD7I8QJw_QS4kUFhNf7j3xVbjipHJzUvEl-DFXCqJgMn0HQ4cMDfIQmEUnQwkTWZ6DiFeSbBfR_hLPKqElatgZjFoJrOOgmQQWZ1_yz8oNW_pxEQTKHEEfYay2pSpMDD0m8jkO3Knl9cDe8ti_oTIlZ3EBupnSAwz7guKDz0AuRNbMhMlu9tGjs7xvQTxXJhSQa2Mvb3gRDb_jw3S_w9lVIZoKiN-Y3UBrYb2QHqz3QsigND9lo0P_XpLLiB49fyOYRaNWMTxEVXOlJHNla3vESDXiJvCQkcR_ICnbEfnqoy4qtNHvmpS5JVX4D-aE0lSf5vjmrZh1_EJSY9T5VVLZwO2PigTF5AUWILxvzCKymkNVanPvWPPkg6MiEp8P-pvvi0Rt10vXSFs9Gp7H_mReinZALUfV_9mG000zwLAhnJTO_gG5jYhICLUUdgfMBgST2SV6gZclLtV0K-ZnwDfxOpI3MZEzsGQWnoWPWLnM5DpJThjXSV3p3KU8kQ8DzOSXkssczqj_yxR9_HO0wAkdGUGEc-X1Y737ZqDiTd_npLUHv5ev6uj1a_UvJmzTVlZJMSvL2GQonWPSm_0o0SLvKTRwKSeTbEUXwNFn8WYd18ZcO3OkD8z2vb1Xb43afl0KujvV_5M0RO9MtGgur7Tlx4Hsj0GlIw5ugT4g_NuuDyAZiVmiQ2alrHzQfqx2pqt-BaiGHfuoFEw7rxjXjVXimnplJx2J3O6TGIWfn90Fe1DYeMRnxhtqOeH9EPIlT-AvE_7cwPRlLhoeOJTxkqQi8nN1EvWg76xNbD4K9OTixNWoqlA2ODmUwRkkKcnvlt5uHMcrenMvF5zwqbN6fME4b9J1tw97TAx8gfpdtj1CUpttqYnQ0oeSbYwwL-Z5YPPYTpvuwHeXtWR-Ihm4121Zvuii1LHQcDftQH9OCFTftMcb_JEW9v0qNaZzOTexIu7ww35nirlJ7Pv5dSbWVd6zTpsmeNCk0hHZ0Dztlj5EQz79L90fZC8xnrkHaLed_XiDORtx0YUYpKNXbVE0Vkw0NHUnzEUk5Dm7Xl15RGXB1dRFPTtU4tv4-qgwZHVXJKMWFRXA7fT8dbPgM6_APoGey_GVM7AhIRwTEc5bcJOBF7D_AK1Tnm6mPe_KvGj7pUQNySnhNs36h_eha_l8Fqyt4Nn27burjlNXN2nayHHujVRLm0bnrs9XL1R3jcA88WYAaHB3KQa8YhkXCkkEXtBAMfgKeNUv2uOsCWmtoHxlQ02BrtXfYBh1aOGeMBn4f21KaSsXZBXBTwrKKO1jBEFZE_TwfUmYVPXOlCadwmbXrdkwXky24Dvqg4woTylgeDDfUDcjOgtdTdU5uWThdAmlBdZAHDZDH4igHH1Hqr-1pT3J5x74l8tjL2Y35Ag2f4QV6FSWbELmF1gGPh8AjCBhDR4IX_kuzqi_vsJ53--qiFfHwOwojo-3Wep1ripgsX0GOvhYymAaVO4zC2EvShoee0OPpw1o2VDZv7XKy5w1OkFFSVTmhX9YFH-Ziq7gNkoW_ELsd4Wy8Mi-6TOl2nNgb7cQQ0CNHy5Jv2gxv_XmasF7Tw8H37S85USVdq2Z4S-FgsHmw1pKUWh1fj8SRqjJBb_e57XszJOtycffls53i4HlFdjkjzenKkSqcHI8afhb5BWck47OClAY9P1w6EbBvPtd8RQqo3gZc3vbbVAceFmYX5ek4ojBJ0f9yRBiaZ3si9cy76vrhwVsYeWlE2VXWGleRsxJ3pHKQmUcTzYBre9obQ7NBBzLlOUtr6yl-hgd6YeSRKPX_LBM_i1xdp-FnkZtN-oCGW1n35PY9KY3Hmy_b389cGxt_H3-GoY6_YY8U-WGK6TWsj73Pg0p_ocRf4_0H8jdRQ2E56RgLRg0FTvM24o4txRFxkymydp1_v-pO00QYOB3YQcPmUdNWhMjAnESblddpi4anyzhl6Z88XW6mdALjsUAIPbRemzlrpYnU654t71YBYU_FfNRmMZhHyAqfxiONRKuv_y7IEEhpakJmowcVbRuPaBvTBSkrYPZGEBxK3VwAQn7QhEqtALmvSIvmElDZ67SNpmOHjSToWnIwS8rM7N_auWP3AUuDlNzBvT8PcZh6aRrebe-jKI-iee7FGFhIYU4YgIeLmDKa4wQnd-U99nDkBdjz536MwxmJongOiQ-YhXmYUif0YEfKamaifibk5q5UqoZ7P8A4iu8qkkOlmmtkGLekYCd6vJP3zc2svN4oJ_SqUmnVidClrpq7Z3ZG9GgvPVh-RFGUtCQV0mBSZezdvrYVe8gwfLxndXYP666W1f2fvkfWGKkcvGztfL3H_w4AAP__cYkJaw">