<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/131607>131607</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [Clang][Modules] Crash when creating an object of imported class derived from lambda in decltype
        </td>
    </tr>

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

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

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

<pre>
    m.cppm
```c++
export module m;
export struct F: decltype([] {}) {};
```

main.cpp
```c++
import m;
int main() {
    F f;
}
```

See https://compiler-explorer.com/z/Pf6f8oj71.

Assertion:
```console
clang++: /root/llvm-project/clang/include/clang/AST/DeclCXX.h:871:
void clang::CXXRecordDecl::setImplicitCopyConstructorIsDeleted():
Assertion `(data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor()) && "Copy constructor should not be deleted"' failed.
```

<details>

<summary>Stack dump</summary>

```console
0.      Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/clang++ --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -std=c++20 -MD -MT CMakeFiles/main.dir/main.cpp.o -MF CMakeFiles/main.dir/main.cpp.o.d @CMakeFiles/main.dir/main.cpp.o.modmap -o CMakeFiles/main.dir/main.cpp.o -c /app/main.cpp
1.      /app/main.cpp:3:8: current parser token ';'
2.      /app/main.cpp:2:12: parsing function body 'main'
3.      /app/main.cpp:2:12: in compound statement ('{}')
 #0 0x0000000003e84598 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3e84598)
 #1 0x0000000003e82224 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3e82224)
 #2 0x0000000003dc70b8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007644e4442520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007644e44969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x00007644e4442476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x00007644e44287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x00007644e442871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #8 0x00007644e4439e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #9 0x0000000006919285 clang::Sema::DeclareImplicitCopyConstructor(clang::CXXRecordDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6919285)
#10 0x0000000006bbacaf void llvm::function_ref<void ()>::callback_fn<clang::Sema::LookupConstructors(clang::CXXRecordDecl*)::'lambda'()>(long) SemaLookup.cpp:0:0
#11 0x0000000007d770b1 clang::StackExhaustionHandler::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7d770b1)
#12 0x0000000006bbafe3 clang::Sema::LookupConstructors(clang::CXXRecordDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6bbafe3)
#13 0x0000000006b8b1a2 TryConstructorInitialization(clang::Sema&, clang::InitializedEntity const&, clang::InitializationKind const&, llvm::MutableArrayRef<clang::Expr*>, clang::QualType, clang::QualType, clang::InitializationSequence&, bool, bool) SemaInit.cpp:0:0
#14 0x0000000006b94145 clang::InitializationSequence::InitializeFrom(clang::Sema&, clang::InitializedEntity const&, clang::InitializationKind const&, llvm::MutableArrayRef<clang::Expr*>, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6b94145)
#15 0x0000000006847366 clang::Sema::ActOnUninitializedDecl(clang::Decl*) (.part.0) SemaDecl.cpp:0:0
#16 0x00000000064d3f68 clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(clang::Declarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64d3f68)
#17 0x00000000064e3b39 clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::Parser::ParsedTemplateInfo&, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64e3b39)
#18 0x00000000064ec5a7 clang::Parser::ParseSimpleDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, bool, clang::Parser::ForRangeInit*, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64ec5a7)
#19 0x00000000064eca69 clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64eca69)
#20 0x000000000659b36d 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+++0x659b36d)
#21 0x000000000659c0a0 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x659c0a0)
#22 0x000000000659cfa1 clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x659cfa1)
#23 0x000000000659e73a clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x659e73a)
#24 0x00000000064af603 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64af603)
#25 0x00000000064e453d clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::Parser::ParsedTemplateInfo&, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64e453d)
#26 0x00000000064a345e clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64a345e)
#27 0x00000000064a3c19 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64a3c19)
#28 0x00000000064ab47a clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64ab47a)
#29 0x00000000064ac3ed clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64ac3ed)
#30 0x000000000649e96a clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x649e96a)
#31 0x000000000483fd48 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x483fd48)
#32 0x0000000004b0f825 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b0f825)
#33 0x0000000004a9196e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4a9196e)
#34 0x0000000004bff54e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4bff54e)
#35 0x0000000000d4f6ff cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd4f6ff)
#36 0x0000000000d46eba ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#37 0x00000000048882a9 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
#38 0x0000000003dc7554 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3dc7554)
#39 0x00000000048888bf 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
#40 0x000000000484b32d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x484b32d)
#41 0x000000000484c3be 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+++0x484c3be)
#42 0x0000000004853a95 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4853a95)
#43 0x0000000000d4c4f8 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd4c4f8)
#44 0x0000000000c13dd4 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc13dd4)
#45 0x00007644e4429d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#46 0x00007644e4429e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#47 0x0000000000d46965 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd46965)
```

</details>
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzsW9ty4zbSfhr4BiUVCZ4vfMGRrPzOP66ZHXt3504FgqDEmAQYAHTsPP0WAEo8SPIhJU2majflJDQJdH_99QFNEMZSlhtG6TUIPoFgeYVbteXi-g5vKFP4QVC65a2kVxnPX67rOWmaGjgpCB37QwD6pH-clD43XChY87ytKKyBN7gplWiJgivgpTCnpFIvDQUotiohiD6BaAlQsrsyU_cq9LWT1rhkWvtx5WVtldupJVNQj9cqOqlOCiGEK1h0wqPloYp7SuFWqUYCLwVoBdCK8LopKypm9LmpuKBiTngN0OpPgFZfi7CI-W-RO7ezUympUCVnevYQJGeSVxQ4Kakw23SQvRQCtBKcK4BWVfVUzxrBf6NE_9qNW5WMVG1OB3fS-weAVktKqsX37_Mt8NI4cq2-J17m0I7zUuCli-_fv1HCRa5H21uSqtu6qUpSqgVvXhacWb9wcSuXtKKK5pYxK3FvENSGoDjHCtvn8yUtcFspmp-SA0G0ANECMkpz-eWJiorj_BuVvGq1xBUXk5mdYu0tFAIUQoCQHgJJPwbKLW-rHDKuYEZhvoOMAIpggcuK5vNDrwJvkVOFy0oC72Z_S7Z1jcUL8G7uFSaPMG_rBngLgFb9k27woSOdOXCSr4JvBK4hFpu2pkzJzqe8UcciZ-fFGd7RKmdKtOwRoFWmQ3U1CA84m20ImSnOK7LVgewtX5WsB0uGG7nlCs4KwisuZnmJN4xLVRIJZwXjMyKw3I5vS5UDb9nlEXLg7G4JZ3cPcHGHH-mqrKgEaGVSLy_F7pI0zZzD2d3qHcPmOQS-845xNc9r3MAZf5duopnGTTO4DZxUp2Jy-MBLPZ0p2j-kFYIyBRssJBVQ8UfKIECRrgooAk6KTolAwEtd_R8zt2QbWLSMmPTQpVELsSVHS_HellIyqD3JW5ZDqbCiOoagSYNoVxAjnRKOjirPgc6zs_vHo7EfJDHUdaNL7RdpL76KkikT0g8CE11k-0EC_7HmUgmKa5NkC1gyZVMuPlPgAvTJee7g9eDdCXiEkH8M_KKimLXNF3ZfbhiuAIpbZlanHFZcq7gEVA2mh4pGUHMSOVkMFzpxdDV9ouLFYvs_zPJKa4w7DkdjFpwp-qw6pzvmXyvf6-RHoe9T3_dRgJzOqKrMAFo9x-E69GdVydrn2Ya19gGZSz4PDWQzpQfsjwUmYVIQ2KitoDhfP5ZV9THpZn4vPZjC9aMQbqSh4KOw_SjsBYdjwSiOCg_iTC_iHxJrJvZiowOxbvZhgW7WC4zHAr2EJuHHBJopvcBkGGBh4iYoDobr9j2tsb3SCzcW9MSSDVB8crVH6QVSpcNqLdFJPSpJYZZhggto2pA-tXc1ci1oAbyFebrrMW7sEIKrKsPkcV0w4C2OMvGZ88e2GRgv37TePgAoqnCd5djU0p1aFO-qiVZhhU9SVds3qlpRHkVO5o48pavszfMWt1KbuKsIttS27N-l2t63RVGSknYl-b6xJXkohLeC0M-cYNM6osW7yTu_hzsbew-jqYcL6h2P1b_gobPHp8XXo_fG6OPMxQg-iFG_ykpV4qr8s2M_nhpnl8nB3f0Mmt8wVaquQX1loBH9_yXLRyN7L9-1CmcVTYXAL9-MowdSbp4boenS_h6J_0eLqwfzFvWe22Mw9_T3ljIdiQZKxnnV_98mhZ5wJCX8MaWJ7_rBO_RMmFsJ_RL1k3M9ZeXs0WrI66M1GFEb-5EXhsdzLSXqC_snK3t2bFINCR2n2bzBQs2dnXP1wyPODUcI_NwrwniI4KvpmQfXdoEynKeFomL3Oxcpy1OlRJm1ispDZHbQoR8PNOQPtG4qrOgtK_gp7w9nrbj4htmG6oi4UJmxxPSOi8a0US_zkjdp-0XwthkT89W-Vuin9w0lh3b2zHXt5TEeRrx_jN_D8dPFKf2bmTfc9szHE-ZJgKNXzb0v66Yahu2p0DxO8JSOo_S-7YDDEbta815q33LSJajX5PbUJ1Pqcfh20P9cpP8NFOKwj140bp-DJPPC_PXo3e0SfBHTyjsqtv1yd1_jqvoXNa8L49Za1btI8lBrVry3a4We9D4fHa0TH_fR-X1gWe594E58QBzs_AUf_CykX4IwTUlPGJoSVmD3VQMW3R7XnrhPPH8BKL5UW2Uh9YC9CWAaefhVwKvupWsK-Fhz9brv7glv6MUCWRvSmzluzH1chI73LjOXtDCN5LQsD7qRy3Vrn7GifeZ_LuXFOgdDSE9XMFm-_MB7vfb-r2f7y6ue5rZnfvKSgT0_oG8y_0UMwvWWKSrs7vCZ24A3vZkSQqXUz8qi1HRcIlI1Iz1f0ZQv4r670RrRdjLLz87aNOJ-DGvEHfRWkzcDnPnR61X_5tkG1ck29VJMXYILbW3PxaRVx8Sjr9e6B958pk-0OtxV-NLg31v6VU0am31xNFsqR9qafu_izpwOuDVf680Ke6H10Zq5J2H8-Sz0E5qEhwFhvq6f2Ja69HaQhdQDHnWmfuwVuT_ajFnwnP5CWUp2Jw689OaZklbR7lZ39OG8MDsgPcxRP-hnThGj0YbgSuhlj-VHcF4IocXQIxw1gD5O3CSkYyKtzlsmFd5vVk65PG3SReK3w9lb4Y95LorAH1nR4e2Nedo3APFrxl6kBHX4evSjdsvJ_SIsCkiIu-4O6fQvT8Od2S0WuyZyvwE-uocW5nPTZYywKHsbwokNIc0w3NG-cB9MXTj-GnhbN9VRgya701pG1yYOuucE5qJ8ouJwx9aLxkUijhFOzvkFziruQmfhLnhdY5ZPs_io98zBEn2PN1o71gQMyFGiZJtuubCu3U9Yr8nzs-vaXzIsS7KWZnhH4WiwvrFWApdK7h5PxOGq0qlgX8a753pI2ldzEz6WcDPlra-Gv_LsiDPi6cmBIBgecjh2PsA--daye1zQ6mXE5Y_--Nch7gM-mQZXnBXwvzk4Jl9SjkaB74xZ8zMP5SdZM17DByvjjspR6Z5M1ANOvWK_MjQdtTMDw87bJRiz96HkT5oZn3gZ_Sgpv_JMnmbkV559LqU68dnvsBbvI6DBpXa-OcTzfhK7MPkhVGqyeirHDVcceDgJTsFeDq5HDcKRzuCUC34glRfoVg09PXneZA0nftE11btOZAfelJK0KwRvr9Bn7z00sh73qPtziOvluW8OOJ9bsRXdK54c_0JJnnzwtJqZ0gucHvtKqO_A9VrPWUuFhVoPzHq3CuoPVETTRi0JA2iFn99PWnin-uDUMUCr_uDxVX7t5YmX4Ct67UY-Qm4Q-MHV9tqPwjj3Atf3cBE5YVEUsRMg5NAk8dzYCa_Ka-SgwPHcyEV-4PvzKMlJTv0CYSchSVwA36E1Lqu5jtM5F5urUsqWXrueGzrRVYUzWklzvB-hzgIEguWVuDbnzrN2I4HvVKVUshehSlWZvwlYmBnBEgSf7Mu7BMHSnnaEf2wpg0RQrEq2gZhBnv1GiYK8gPZAvt1pkBLmVNeAHBaC19A2V7Bk-78FuGpFdT0-er8p1bbNuvP2JgMPzskbMyVAq87Sp2v0nwAAAP__RG8F6A">