<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/132614>132614</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [clang] Assertion `DS.getStorageClassSpec() == DeclSpec::SCS_unspecified` fails with invalid static friend function declaration
        </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>
    Goes back to clang-9: https://godbolt.org/z/afo7TWMz9

Generated by fuzzer.

Simplified test:

```c++

struct seq_t
{
  friend static unknown foo() ;
};

```

Stack Dump:

```c++

clang++: /root/llvm-project/clang/lib/Sema/SemaDeclCXX.cpp:17869: clang::NamedDecl* clang::Sema::ActOnFriendFunctionDecl(clang::Scope*, clang::Declarator&, clang::MultiTemplateParamsArg): Assertion `DS.getStorageClassSpec() == DeclSpec::SCS_unspecified' 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>:3:31: current parser token ';'
2.      <source>:1:1: parsing struct/union/class body 'seq_t'
 #0 0x0000000003e95b68 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3e95b68)
 #1 0x0000000003e937f4 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3e937f4)
 #2 0x0000000003dd8688 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007de701e42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007de701e969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x00007de701e42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x00007de701e287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x00007de701e2871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #8 0x00007de701e39e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #9 0x00000000068fa318 clang::Sema::ActOnFriendFunctionDecl(clang::Scope*, clang::Declarator&, llvm::MutableArrayRef<clang::TemplateParameterList*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x68fa318)
#10 0x00000000065272a6 clang::Parser::ParseCXXClassMemberDeclaration(clang::AccessSpecifier, clang::ParsedAttributes&, clang::Parser::ParsedTemplateInfo&, clang::ParsingDeclRAIIObject*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65272a6)
#11 0x00000000065285b1 clang::Parser::ParseCXXClassMemberDeclarationWithPragmas(clang::AccessSpecifier&, clang::ParsedAttributes&, clang::TypeSpecifierType, clang::Decl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65285b1)
#12 0x000000000652a187 clang::Parser::ParseCXXMemberSpecification(clang::SourceLocation, clang::SourceLocation, clang::ParsedAttributes&, unsigned int, clang::Decl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x652a187)
#13 0x000000000652c913 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+++0x652c913)
#14 0x0000000006500918 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+++0x6500918)
#15 0x00000000064bd2e4 clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64bd2e4)
#16 0x00000000064bdd49 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64bdd49)
#17 0x00000000064c5613 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64c5613)
#18 0x00000000064c652d clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64c652d)
#19 0x00000000064c69e0 clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64c69e0)
#20 0x00000000064b8a43 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64b8a43)
#21 0x0000000004827f98 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4827f98)
#22 0x0000000004b158e5 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b158e5)
#23 0x0000000004a9759e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4a9759e)
#24 0x0000000004c05b4e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c05b4e)
#25 0x0000000000d51dcf cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd51dcf)
#26 0x0000000000d4958a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#27 0x000000000488d679 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 0x0000000003dd8b24 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3dd8b24)
#29 0x000000000488dc8f 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 0x00000000048506fd clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48506fd)
#31 0x000000000485178e 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+++0x485178e)
#32 0x0000000004858e65 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4858e65)
#33 0x0000000000d4ebc8 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd4ebc8)
#34 0x0000000000c15884 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc15884)
#35 0x00007de701e29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#36 0x00007de701e29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#37 0x0000000000d49035 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd49035)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)

```
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzkmk1z2zjSgH8NfUFRRYLfBx84spXX8yYbV-TayU0Fgi0ZaxLgAKAj59dvAaTED8v2eNbKYTcVlSUQaHQ_aHS3IBCl2I4DXDrRb050dUFafS_k5bdW3fseDoKLQpRPl58EKFQQ-oC0QLQifOdmTpCje60b5QS5g1cOXu1EWYhKL4TcOXj108ErshXJ3R9ffmaOlzte_gk4SKKhRMUT2rY_f4JcdE_WrG4qtmVQIg1KG5G23Ym97j918G_mv21VWrZUIwV_brRpSUw7QlvJgJdIaaIZRS1_4OIHR1shHJw6OENOYMcnV_2bkfheC21MvGrr5g0FLIK-IciRg1dSCO3gVVU91m4jxb-Amo99v1XFCgev1lCT_s8V0Gr5_fuCNmYqP0ljy7PrH-ROkP-D1FCabg6etFsh9l1O9Ve-sjavWk41E7zrn467U9GAg3MHL8dSTEciiRbSwfHs2Ze20uwO6qYiGm6JJLXKzYpaDXOlQJqpkBN7V-vFDvRaC0l2sKyIUusG6JH2lRNcITOTbe3UWa43LVcNULvYDk7QlrAKSuMHt5-v8_U1Um1RM40IKtodktAIqY3bzXyN6fu2WFBR99Sfw2dKtaAcvEKEl4hxWrUlIH0PiEqi7q0_a0koGPsbCY0UFJSCEinRyq7ZjCRKCcqs28qWI0Ula_Ti6C7l0V28heNlt1LsJKkRkbu2Bq5V7yCisQ4h6oZVIF3YN5WQIA9O4pIDWOVq2fIHB68KxgcfMr6G3F35g8itGyJ3h1xh5JKmMdJb3bR6oZBbGwrIdfdp7BJVu-qJa7J3givGNVTI3XLhPoIshALzHLlr5Lo7Sl0tREXvCeNm4V7T13RWnDTqXmjkbqmohHRLRnZcKM2o6uawjCfNTrDswQbXjpf7htakLcgD8_LtTmilBK5RQ6QCibR4AI4cnJitixPHy_GJ4X7_sqMY36EuUDh41XImephKIRPTjLAugFhxyMGBh7y9d_gXQBYVcYqsb1nfVU-qe3MrGdd28e8690mHTpL82AilJZC631mMa7sdzK74EC9w8G_evlfP7MpOeX-mfJBsw1PKLysgvG2-8jXbcWKiRcttCihRJcwU51DVKDOoiieqlmUapylaGn_5BlQ8gnzqdPs_wsvKzJj2DCd9loJr2Os-hHr21ckPevlJCYnnQ4gj7PVGdYF4n8abOHQrxtu9u-Nt94AulFjEVmU7ZFA4nArM4mxLUaPvJZBy88Cq6n3S7fhBejRXN0xitFMWwXvVDpN4EBxPBeM02QaIFCaevkusHTiITZ6J9Yt3C_SLQWA6FRhkkMXvE2iHDAKzsYPF6ZYEfvoLcuiw2760mhQV5FKSp2-wdYLlaNwktYIG-ZkpbcQH12fYfb35HRwTJyZRLo5wgkk8NuvWRtzR--X37za3f4G6AHmw2sbTMaWcmuy57lO7nMGykspca8mKVpu0PC87ns1bHkDd8K043Z_xndHnW35z87Xo0n5-DoYdpYGhP2OYRoX_9xj-wfT9rSS7mqg3cJ7k9SrRu6cGjgLMhxMOfDZgBskADM-AET9N3gLWseoNoCc8bm1T_2dxeDYx7tWHL7A7ZkKbb34dK0NjYBXMWNHMD15ndai8e08ZM9LioXcGU0H9P-Plezgdi_f_eLeeiA6FENUrUg9z93n-r6zgOdbG0B_WJpyujedl08zyDMtoqx-Nn-30s0L--3D7np-7TNXDPqSqaf8b8-WdMm1iDCc1HKWeYUEs8mFBosmChEWJIXxzQb7KIdlvb7gG2VXC789Xb_boM9Tp9X22Xh_PqyMy8IrnvMow-6sOPMHGOHsekc9Cbe5tv4ZaGWYDtWRKjUbxGyH5et851YvV0rlInYGFtXZgkc5YxBEuX2VxJ5rP8AjV88L6a0P-bOFWy2mBbDp-kqJtbOl8_dzwoX7_Isq2gpu6EdJ8I9dwpjzQmTlAyOYQMvBehbBiUun_EhIZeEcS2JsFlJSEz7dGvr6blW72KDQelwHd33PsZaPSoPCkdg9TnGyzSQpfihI-Ac9toOuarvdAWw19U3-8-bFq9ooMak4q5rDwoxSisZoraZIsL0_oeSYNOx0GDSd1akiyJMpgCrKb84YrTTiF0yxfNuks_tvrOVgxqehC6kVFOLGi13cw5lGc-i7yzNizBONev0H7SfnjlZFf0i2i1N_UxAgYHUyOzyLuiURU8OHUYYmmbXiJHgUrz2NEp-VgQzy1IcyilKAD9qV_Z-PCyJJ1Tarqn0C1kKbwPGnQ7DzGyOiL0kM_61ylZI8gZ0eIRqdkGiTSMk4yi2QkdNsXQxtpqdqn3dbrTqOdIKekqgpCHzZbPg3s3cS96yz9pahrwsv5Lj65ekr3_URjZicGwAiOlozv-nTRLe1xwGZD93vf7z4URDG6UbZ7j3DS2TRstCRMq8PjmThSVWYrCDl6brrkQzS37tMBt0McnFSkLkri4GRAhdPDyfPvojixGOn8vLjA46PtU6fC3ZNvLV-TLVRPE5avr9sZzr87jQeHz-bORdMt-l92DkN80RCpF96LXjD9dSZMIy_eli9Ss6tGnmXGA8pJ6J4NNB1GQWL5yhzjrvmknBkZ9rFVgjX76ErBrJiJ_CSF90L5XRTqZSK_i8J86Z8QeS0WHz2gIcws_vOjtFch9m7yS1AaWANKPEOZQhy9pPbV6P2kQDhRGby0BL8Q5RmqVYtngBfMcjgUtC-qD5XIQXkbSvI-ELydoT-69rCaDXpPqj-P-lGahsho_NETd6KHiWc_-uGszN75G6UdMgic_9iXQeihzcaM2ShNpN6MzPrLU0A4miKZF2peEKFO-MevkxHeTT1-FuQIpDRZpb8Ug7b9lwZEe__v7pOgH0zfI9gz404lID8IjY6tAuQ-Ii2QAkBsVMxns_s-F-VlUGZBRi7g0k9CnIRhlMQX95cBTWhaQBgTLyzDOPZpUhRlHARRHBV-HFywS-zhyAtw4EchjuJFAhQiHAZRUCReCJ4TelATVi2M-y-E3F3YqyqXfoBjP7yoSAGVsheyMO6Nx050dSEv7Q2Xot0pJ_QqprQaRGimK3uLqxsRXX30VZ3Ys2hVR5bxR1Kx42Wr_urVobRC5XDuddHK6vLvX97poTxe4n8HAAD__5RX6ag">