<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/136813>136813</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Clang crashes
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          wangtz0607
      </td>
    </tr>
</table>

<pre>
    ## Example

```cpp
template <typename, typename>
class C {
public:
 template <typename>
    class C2 {
    public:
        C2(C &) {}
 };

    void f() {
        C2(*this);
    }
};

int main() {
 C<int, int>().f();
    return 0;
}
```

```sh
clang++ -std=c++20 example.cpp
```

## Actual Behavior

```
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-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 -std=c++20 <source>
1.      <eof> parser at end of file
2.      <source>:10:10: instantiating function definition 'C<int, int>::f'
 #0 0x0000000003bdfdb8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3bdfdb8)
 #1 0x0000000003bddefc llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3bddefc)
 #2 0x0000000003b2e7f8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x000071aeece42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00000000076ce50f clang::TemplateArgument::getNonTypeTemplateArgumentType() const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x76ce50f)
 #5 0x0000000006c43df8 checkDeducedTemplateArguments(clang::ASTContext&, clang::DeducedTemplateArgument const&, clang::DeducedTemplateArgument const&, bool) (.part.0) SemaTemplateDeduction.cpp:0:0
 #6 0x0000000006c85fc5 DeduceTemplateArgumentsByTypeMatch(clang::Sema&, clang::TemplateParameterList*, clang::QualType, clang::QualType, clang::sema::TemplateDeductionInfo&, llvm::SmallVectorImpl<clang::DeducedTemplateArgument>&, unsigned int, PartialOrderingKind, bool, bool*) SemaTemplateDeduction.cpp:0:0
 #7 0x0000000006c89553 DeduceTemplateArguments(clang::Sema&, clang::TemplateParameterList*, clang::TemplateArgument const&, clang::TemplateArgument, clang::sema::TemplateDeductionInfo&, bool, llvm::SmallVectorImpl<clang::DeducedTemplateArgument>&, bool*) SemaTemplateDeduction.cpp:0:0
 #8 0x0000000006c89c46 DeduceTemplateArguments(clang::Sema&, clang::TemplateParameterList*, llvm::ArrayRef<clang::TemplateArgument>, llvm::ArrayRef<clang::TemplateArgument>, clang::sema::TemplateDeductionInfo&, llvm::SmallVectorImpl<clang::DeducedTemplateArgument>&, bool, bool, PackFold, bool*) SemaTemplateDeduction.cpp:0:0
 #9 0x0000000006c8b53f DeduceTemplateSpecArguments(clang::Sema&, clang::TemplateParameterList*, clang::QualType, clang::QualType, clang::sema::TemplateDeductionInfo&, bool, llvm::SmallVectorImpl<clang::DeducedTemplateArgument>&, bool*) SemaTemplateDeduction.cpp:0:0
#10 0x0000000006c867e6 DeduceTemplateArgumentsByTypeMatch(clang::Sema&, clang::TemplateParameterList*, clang::QualType, clang::QualType, clang::sema::TemplateDeductionInfo&, llvm::SmallVectorImpl<clang::DeducedTemplateArgument>&, unsigned int, PartialOrderingKind, bool, bool*) SemaTemplateDeduction.cpp:0:0
#11 0x0000000006c91b1a DeduceTemplateArgumentsFromCallArgument(clang::Sema&, clang::TemplateParameterList*, unsigned int, clang::QualType, clang::QualType, clang::Expr::Classification, clang::Expr*, clang::sema::TemplateDeductionInfo&, llvm::SmallVectorImpl<clang::DeducedTemplateArgument>&, llvm::SmallVectorImpl<clang::Sema::OriginalCallArg>&, bool, unsigned int, unsigned int, clang::TemplateSpecCandidateSet*) SemaTemplateDeduction.cpp:0:0
#12 0x0000000006c969e4 clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, bool, clang::QualType, clang::Expr::Classification, llvm::function_ref<bool (llvm::ArrayRef<clang::QualType>)>) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6c969e4)
#13 0x0000000006a9c46a AddTemplateOverloadCandidateImmediately(clang::Sema&, clang::OverloadCandidateSet&, clang::FunctionTemplateDecl*, clang::DeclAccessPair, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, bool, bool, bool, clang::CallExpr::ADLCallKind, clang::OverloadCandidateParamOrder, bool) SemaOverload.cpp:0:0
#14 0x0000000006a9cdbf clang::OverloadCandidateSet::InjectNonDeducedTemplateCandidates(clang::Sema&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6a9cdbf)
#15 0x0000000006a9ce17 clang::OverloadCandidateSet::BestViableFunction(clang::Sema&, clang::SourceLocation, clang::OverloadCandidate*&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6a9ce17)
#16 0x0000000006868301 clang::Sema::DeduceTemplateSpecializationFromInitializer(clang::TypeSourceInfo*, clang::InitializedEntity const&, clang::InitializationKind const&, llvm::MutableArrayRef<clang::Expr*>)::'lambda0'(bool)::operator()(bool) const SemaInit.cpp:0:0
#17 0x0000000006868c1a clang::Sema::DeduceTemplateSpecializationFromInitializer(clang::TypeSourceInfo*, clang::InitializedEntity const&, clang::InitializationKind const&, llvm::MutableArrayRef<clang::Expr*>) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6868c1a)
#18 0x00000000067476eb clang::Sema::BuildCXXTypeConstructExpr(clang::TypeSourceInfo*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x67476eb)
#19 0x0000000006d218be clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformCXXUnresolvedConstructExpr(clang::CXXUnresolvedConstructExpr*) SemaTemplateInstantiate.cpp:0:0
#20 0x0000000006d01408 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#21 0x0000000006d3bea9 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformStmt(clang::Stmt*, clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::StmtDiscardKind) SemaTemplateInstantiate.cpp:0:0
#22 0x0000000006d3c685 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformCompoundStmt(clang::CompoundStmt*, bool) SemaTemplateInstantiate.cpp:0:0
#23 0x0000000006d4335b clang::Sema::SubstStmt(clang::Stmt*, clang::MultiLevelTemplateArgumentList const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6d4335b)
#24 0x0000000006d99e67 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6d99e67)
#25 0x0000000006d97f88 clang::Sema::PerformPendingInstantiations(bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6d97f88)
#26 0x00000000062f5709 clang::Sema::ActOnEndOfTranslationUnitFragment(clang::Sema::TUFragmentKind) (.part.0) Sema.cpp:0:0
#27 0x00000000062f5e9d clang::Sema::ActOnEndOfTranslationUnit() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x62f5e9d)
#28 0x000000000615ae83 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x615ae83)
#29 0x000000000614920a clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x614920a)
#30 0x000000000451a5ed clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x451a5ed)
#31 0x0000000004828c2a clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x4828c2a)
#32 0x00000000047a535b clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x47a535b)
#33 0x0000000004918a43 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x4918a43)
#34 0x0000000000db1801 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0xdb1801)
#35 0x0000000000da9f5d ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#36 0x000000000458c189 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
#37 0x0000000003b2ec13 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3b2ec13)
#38 0x000000000458c3a9 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
#39 0x000000000454f7fd clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x454f7fd)
#40 0x00000000045507c1 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+++0x45507c1)
#41 0x000000000455ab0c clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x455ab0c)
#42 0x0000000000dae531 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0xdae531)
#43 0x0000000000c301d4 main (/opt/compiler-explorer/clang-trunk/bin/clang+++0xc301d4)
#44 0x000071aeece29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#45 0x000071aeece29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#46 0x0000000000da99f5 _start (/opt/compiler-explorer/clang-trunk/bin/clang+++0xda99f5)
clang++: error: clang frontend command failed with exit code 139 (use -v to see invocation)
Compiler returned: 139
```

https://godbolt.org/z/faxEK476f
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzsW1F346az_zTKC8c5EpIs6SEPihP3brt7k1unPfuWgwDZdCXQBZRN-un_B5AsS7azTuq0D_3vycaOgJnf_GYGBoyRUmzNKb3y4msvvrlArd4IefUd8bX-05_7yUUhyMuVB0MPhuD2GdVNRT0_Nz9z3_3gpvH8XNO6qZCmwAsX-qWhHNXUgwuwfR_een6OK6QUWAAvufb8vGmLimEvNOLAQQF2EAAAdANhN9I8Go3u_i2gB9MF8ODcg5ntm9yYZvMSXjvgpt-TYASUHkz7bhMRHsz1hikPZm6YaXCidiUxrkGNGB_LWXjhgnFtjDcv4a1rvuzUDQIl1a3kwO_kOfE9qxOS1caxx9cevPbgNZgpTbzwBrs_oQ-oc86lc8dUjnNgjnWLKnBNN-iJCTnR4fn5_efbfHULVFvUTAMEinYNJG2E1EALsNG6UYZwuPTgcs30pi0usag9uKyqp_5l1kjxB8Xag0umVEuVB5cAcQIYx1VLKNAbCrBEagMKhL9pibCNlEbSRgpMlaIEKNFK99iMREoJzJCmBMiWA4Ula_Sl5-crjfA3QNq6cXHgX3p-di_FWqIaILlua8q1gQw8uBSNwYRF3bCKyhl9biohqTTPDLEzLVv-zYPLwnh0OSJ7Tb4jWc4iMFuDmTDCUNMYka1uWn2pwKw2poPZ7Dmdz5CqZ-qFa_TshTeMa1qBWcnF7InKQihq2sFsBWazNcYzLUSFNyaKwptXQZrOiqNGbYQGsxKLSsgZYWjNhdIMK6fDEjt-PI0UL1x09Nr0CgxnXrigovTCW9AgqagESAPKCRAlKJlNedh1G4aGeeD3vwDjSiOuGdKMr0HZcqyZ4IDQknFm33ow2U-NMPfCvPRgYrMUhj7wn_3-X1iQkhQpsMFle6oX5d7cS8a19f6Di5906CTR90ehtKSothOBU2YS1CTg-8PAg9f-c4fJJLJDHEwQE1riQ4gXFUW8be74iq05qjyYttxOvgRUwqg4Gz6DYMAHx_ggTcoULEyU_EqxeKLyxQH6H8RJZdSkHVujPgvBNX3WdnYJc9_-d_LDTn4SIEoxjWBsQsxaUrHCg8vndP44j2YV4-3zbM1b14AvlbicW8h2yAA42gWczDGN_RI4My2RD91CkXfp7Z6uqf5fwR9eGjptN8-6GRoLrvRZaO5wDajjXdRzHIWkTAHeUPzthpIWUzKFpTyY7liVrx46jruY3Wk7IsGZ877uhRBVF3KXDZL60jgArGiN-mFWikncAz6fj41N4xLHwKndM_P6xTjgC9J4M7bYKNsH34-_RxLVVFP5mRnQ-aTb_7Woco495bEyqkbit9Z94qXoUAxJu6pRVf1OsRbyU91UXrj4Mb12obdytnndTXX3SGqGqjtJqGR8_QvjZHBB_5q_hf9kwn8Wx-Ex_s9I-qkBuEfNe7zR03Mur7yD5nRKM47mH0XzYGYuJXr5lZZj-w4a9u5h_1hujIPe5Ab-thQVeaeHsomHijgsJx5aNRR_RDJ8xAz0D8e8qWb8CaPzhB6N-f9O7eed2g3_wZj_LCgCdIz_pRT1AlXVMM_-NSdMrXu3U26fG9lXvUgpVjKMjL2Huu35_-_16IlyVltQd5KtGUdVR_z-1DZl8RVWd-eoBeKEEfMH1W-MGTiJmXlGI3AQ_EmL17LbvA2qcfXjYsDEkfPPSetZ7_u99ajXvtU6jeC3TaXT178WvINV_Q73UVrLjHgw2oUeNnur09idud9n2ZB0bncbEhMU4SgokKldEMjJNhXunqisBCLbuPtU15QwpGn1cspEsjfexu2012mxZJ7mGFOl7hGTHxloJ4SFSewhBvKbz-ZBP7O_RoCdUu1SsLvDMuz1XQ_kbjR1EynKH9JsWz7xPyg2m97JHLfteazaOVPAOaxDwMVTS2iQnGbJNVX6d4aKivbhckoAruxB1GdxcGnZU9ZPJeczngbJYPx4R5zO09APTpmCzczPUMX-tEaYBf0TZ9o-sWcxu3nw0lBn807077QPA8kt10y_HNuebTtanSayRz2HhPrSauOUH-dV5h55MKlQXRDkezDxYNqlgGsUDZVIC9mdgm9bu0MZQ5ABdiBFkim3OED_Im7PE7COtiFgx3vbJErmtDhM6nXLKrL4-tVwtDC2yBZrh_AtFO6n6zvI-IHEnVOtv86Y42RgbLzXJDBICzpapySlDxJxVQpZe-HCgynigr_UolWAo5qqxp5UZ-Nl7dP24FzI7Yn4Vs7i69ffuKRKVE-UvML-a_32aslBJd1PNzjeARI_iPz0w-3ct-hd2Me7JxIWFGUfjn2l6-nWyz7Zq5jPqNxouGEKI0lcafIWluCEJTxP44-PZFE3ouVkn61xSz4tnk6zaVzukigM4yPz2aotlD7VZ1_aSrPP9IlWh8rQnbn9TJOOA76ddOC4PCRZRufJYbN26Bm2UP2HbxNTX6uc9vZfx4rmc1lsbRosjicWJ2WaHrb4nkoTWPeUE8bXg_1McLWtL86O1uAZ0I7rPljGiZ8dRptjfcdvObkrbUpUFudvnOmlROsjpzcug37re_SZvv-hzYGESKbIaEbeiKy_13AO4hyAgbhx_RHEiKbhLrx7-zH0zvsH0dg8dHG5S9Vdg_6_pfdaTo9-cPWTFG1jK4rbAxuILQNfBGkr-qluhNQrbXcL50tpZ9tg-biOCKIM-mjP8nz1cHQP9CGB7XBsUY4_iI_iAMV0FD4LQehPlOduu9at2BS3mub9Du5c2DrtA7bRKh-lMMVwxOBSCq4pJwfAnROWUzzAGi2rUYLiyRK06BS5mQrTw6wdt-N8MdmBG6CPVs8oC1IUheMzMQtysOBpu3hMV_KRha5-OwtkB2qAPFoZfVIEqdlx4-Cxu5F1-Fxog2S_aG93FKNncGEvh50RuYM2AI_HwFFWxgT0BC-CB5vV6avn0ntWTDaXRkZ3m2BUohDJnqjcXyzGH-hHcYqDNHOX5I6eeNrW_kpbV-xhVFUFwt8eSz6ei53iLkgWwULUNeJkmpkHXWZvL7kDBKMdGQJ2yNGS8XU3wzt_bgc8PuLn5yBwfxRIMfyobPeOwlFn8-BRS8S06psn4lBVmaAXcqfddMknn_Q4wscHIu48pD_xTfsLPz-L4oAzkumNHRyEO344dC_Htfza8hUq3fntqX4727UjC3OI8nQaUeF4J_avi4hJ1XbY9dmYtahMSnKUNesqtLfE9VSOZubJQNPh2BHWK13zye2h892n6mzdxk80qT9iP8HBW5n4WRTqOA0_i2Kyh3v908Ct2xvE5HCR8VTmutj4MP4sQwN_wYQ_VPj4GNabnfejlf7AEn-M97-Rv3NVlZaTgTE4WZdpHHYR15cUPWI7U-R7nz8dW3XPUkRYOAPYUcHm49APSGTvop9Fm5M3aIvGdzxhRrI33vG0QwaB8VQgjXzw-GjGPCqNpH7cseVkFTTaUTGflllZGQMn_EweMRKdvt22MAdUSrMm5C56QNmV8QB3MV0iVlECvjO9AfSZmWghFAShDZVWUTB7AloARSlgO5W20dRX2N2XB6hJKTNy_8r_5LK-IIWo9KWQaw8u__TgskTPt79Eyby8IFchycIMXdCrIIniMA3DJLjYXBUozMrYRz6J0zCjaA6DeenTzPfLJCtjdMGuoA9jP4KhH0UwDi5hEcMy9udBGOMMp5kX-bRGrLo0SWJ0X9hvBFwF4TwNwosKFbRS9rsnEHYcQi--uZBX9osERbtWXuRXTGk1iNBMV_RqYam1t92pumhldfX-byd0cJ6u4H8CAAD__9_eypA">