<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/97302>97302</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [Interp] Clang crash on valid code with new constant interpreter
        </td>
    </tr>

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

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

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

<pre>
    https://godbolt.org/z/vn5ss3njh

```C++
namespace DeclRefs {
  struct A{ int m; const int &f = m; };
  struct B {
 A a = A{100};
  };
  constexpr B b = B{};
  static_assert(b.a.f == 100, "");
}
```

```
clang++: /root/llvm-project/llvm/include/llvm/Support/Casting.h:566: decltype(auto) llvm::cast(const From&) [with To = clang::RecordType; From = clang::QualType]: Assertion `isa<To>(Val) && "cast<Ty>() argument of incompatible type!"' 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 -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -std=c++14 -fexperimental-new-constant-interpreter <source>
1.      <source>:8:1: current parser token '}'
2.      <source>:1:1: parsing namespace 'DeclRefs'
 #0 0x0000000003a30b48 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3a30b48)
 #1 0x0000000003a2e82c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3a2e82c)
 #2 0x00000000039745c8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007f0dae442520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007f0dae4969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x00007f0dae442476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x00007f0dae4287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x00007f0dae42871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #8 0x00007f0dae439e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #9 0x0000000003ed224e decltype(auto) llvm::cast<clang::RecordType, clang::QualType>(clang::QualType const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3ed224e)
#10 0x0000000007712a7b CheckEvaluationResult(CheckEvaluationResultKind, (anonymous namespace)::EvalInfo&, clang::SourceLocation, clang::QualType, clang::APValue const&, clang::Expr::ConstantExprKind, clang::FieldDecl const*, llvm::SmallPtrSet<clang::MaterializeTemporaryExpr const*, 8u>&) ExprConstant.cpp:0:0
#11 0x000000000771422a CheckConstantExpression((anonymous namespace)::EvalInfo&, clang::SourceLocation, clang::QualType, clang::APValue const&, clang::Expr::ConstantExprKind) ExprConstant.cpp:0:0
#12 0x000000000772ee22 EvaluateAsRValue((anonymous namespace)::EvalInfo&, clang::Expr const*, clang::APValue&) ExprConstant.cpp:0:0
#13 0x0000000007730fb1 clang::Expr::EvaluateAsRValue(clang::Expr::EvalResult&, clang::ASTContext const&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7730fb1)
#14 0x00000000065d20c7 GetExprRange(clang::ASTContext&, clang::Expr const*, unsigned int, bool, bool) SemaChecking.cpp:0:0
#15 0x00000000065e5074 CheckTautologicalComparison(clang::Sema&, clang::BinaryOperator*, clang::Expr*, clang::Expr*, llvm::APSInt const&, bool) SemaChecking.cpp:0:0
#16 0x00000000065fefce AnalyzeImplicitConversions(clang::Sema&, clang::Expr*, clang::SourceLocation, bool) (.constprop.0) SemaChecking.cpp:0:0
#17 0x00000000065ffbc5 clang::Sema::CheckCompletedExpr(clang::Expr*, clang::SourceLocation, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65ffbc5)
#18 0x0000000006abb5ac clang::Sema::ActOnFinishFullExpr(clang::Expr*, clang::SourceLocation, bool, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6abb5ac)
#19 0x000000000680c346 clang::Sema::BuildStaticAssertDeclaration(clang::SourceLocation, clang::Expr*, clang::Expr*, clang::SourceLocation, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x680c346)
#20 0x0000000006412ede clang::Parser::ParseStaticAssertDeclaration(clang::SourceLocation&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6412ede)
#21 0x00000000064025c9 clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64025c9)
#22 0x00000000063be341 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x63be341)
#23 0x000000000641b7d4 clang::Parser::ParseInnerNamespace(llvm::SmallVector<clang::Parser::InnerNamespaceInfo, 4u> const&, unsigned int, clang::SourceLocation&, clang::ParsedAttributes&, clang::BalancedDelimiterTracker&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x641b7d4)
#24 0x000000000641deca clang::Parser::ParseNamespace(clang::DeclaratorContext, clang::SourceLocation&, clang::SourceLocation) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x641deca)
#25 0x0000000006402687 clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6402687)
#26 0x00000000063be341 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x63be341)
#27 0x00000000063bf1df clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x63bf1df)
#28 0x00000000063bf6a0 clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x63bf6a0)
#29 0x00000000063b29ac clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x63b29ac)
#30 0x000000000431c728 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x431c728)
#31 0x00000000045a3859 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x45a3859)
#32 0x000000000452952e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x452952e)
#33 0x000000000468bd5e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x468bd5e)
#34 0x0000000000c700b5 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc700b5)
#35 0x0000000000c692da ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#36 0x000000000435fec9 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 0x0000000003974a74 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3974a74)
#38 0x00000000043604bf 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 0x0000000004325f05 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4325f05)
#40 0x000000000432696d 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+++0x432696d)
#41 0x000000000432e385 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x432e385)
#42 0x0000000000c6d485 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc6d485)
#43 0x0000000000b45944 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xb45944)
#44 0x00007f0dae429d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#45 0x00007f0dae429e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#46 0x0000000000c68d8e _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc68d8e)
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/eJzsWltz47YV_jX0C0YaErzqwQ-0vEo33XTdtSevGhA8lBBDAAuAXjm_vgOAsgVaduzETqdtdrQeCZeD73zngkMQRGu2EQDnUX4R5ZdnZDBbqc7vlRQbzsRZI9v7860xvY7SOsKrCK82sm0kN3OpNhFe_Rrh1Z3ItU7FL9sovozievxbxP6zjPCF_bhWQXage0IBXQLl36DTKCrHPoS0UQM1qI7KC8SEQbsovUBUCm3czwgXHYrSS98elZdROp16cSSuRsSNtuKSOA7Hh7_cGrDvFbpAjZt0YeVMViCG0TXRGpSJcNXMydzBscOtfLxEEcbus3iYZ2WEfJwkyf-knIjNSFdaowivlJQmwivO73azXslfgB5-RnjFBOVDC48N10PfSwtutSTaMLGZb6O0zovCSmuBcnPfQ4QrMhgZ4QVy09I6SmtKtNXJc71Schfhwo6I8ovvzGzRjXSseIBuxjegUrU3VmB64aZMR_xzINz155d2_doRx6RAUREzTaJ0eSOj9FOEq58Jd4vZNQtLooOTLm_ufb_tJGoz7EAYJDvEBJW7nhjWcEBep8TxXqKOMA7t3PN59eVTff0J6aHZMYMIaoYNUmApQkaiiVszsx2aObWqH_ic0M60HkBHeIWIaNHIPjJbQFQRvUUNobdGEQrWFXoFvZIUtIYWaTko32xnEq0lZcRAi9QgkKaK9WaEfG0IvUXtsOstMtcUz6N4caXkRpHdAw16dBDZW2SWDsZBzWDfc6lA2TZriRk5sK5nRg3iNsKrholDt_c1NNu034nqZhmabdBMWrmk7630wfSDmWs021ku0Gy2r4oZ0buZvheG7KP0kgkDHM2u0Wy2oXRmpOR0S5iwgfESPDtYC9LrrTRo1lHJpZq1jGyE1IZRjWadkDNHbNisTRull9RDTzI062Dfg2KWFcJnAr7PnBsTYWYWnOoVGFAoSpejGdJPntjEEhs0p3UVpXViuaWDUtbdeqI0KGTkLQgU4dIGNC69AHxCQHIQYCcysUGPKS_C5SHrPYhAEU5jFO_jw7-UpHGTVUexqe-1_3KlmDDOQW68l1WPgxT5vpbaKCA-dJc2Y_qgqt7JTSJ8Ee9HeDbFPeBPQvwYKkxP4V9yIGLov4prthE25KtBuO2nRVzaVT4ArQMToMUB2kWZ5bRCS-tnNqXdgbr38P5GRMvtotXIZDBmKYWBvZnT3gZq7P4_LJGOS5Rd3BLIMpzjeFSNsybCq31VrItsxpkY9rONGHwHnWs5LxxwNyWAnYUyF8Wio6g3WwWkXd8yzt-2gJsfLJBPQWdlgTbacfFW8FlZBLKLUDauyi5FpLGJ-E2S3cRAcvlEctK8WWbSBDKrUGa6gEXxNpluSiBzEXgdtBhn8IotOV2e3nLx8uRO63bLEx2-wDns6e8cY16ZB21tQggyWlkmmJQNWm6B3n66I3wgVu430AO3RcfJ9r8z0fqKqiJCivudHPRjKnUVllXQTvssOjnmvCPVr11O_iKpE_ocYWFzffUz4cMxW0H3p32vxkw2bjC25YD0aOCKAW9tqj9Iqu2AR9Ne7wjnV0Zdw8TCPxEDihHOfoUb2PVSEXVv1wjkVIOzs7Ol7TyAeZqLrCmSiSkyjIk3xbESoLVjqfpv4fs1quNQdQyAMRodDWr9zS3-R3R-Ypqnur3aTmkINo27JjlNxgkNnh13CLIp8vr6ZtzBAvIbKV0l7p8D3jlRjEoFiSI71rrIWxzTEv0AztDfiNhMlHuE_QpjPBQXbv8-KPeo5DXsiAsE-6B00iZ5iA7yuMx87NzYfM3lhlHCl_ZZRDHt4uc4ImBHnsK8YIKo-689KGKkeuo3zn4vtT6mkfrq-rM4bcDf1q0Ideugo4BqQfj9r_B513NGmVlKcQfKZgb9GtVOQ3-aGA4gI1zNHfheyX4evw53OcHdNTRHU2g-afgkt-s5GGg9uCeR8ja47xkOI_YgHKpAOdI0OaGnlaup-SpWTDC9XQ2c_1HtnkbHe2vrlQm0DWqiooppmhWntb0YGG-v3QGMP0awmytRoxLVa7eh34yt_4gfeMWPmcFB_VRkCYYWjsFduYfSo--_i5uPqAZHsIE2SahNjHO6eFGbZzU4dEj1sA28aLRphnLS29oYxZrBgP49I6Zr1B_CoiMpYDGoZoq0gTRLXmTx096AEoQ_y-Z7sHHlTznsGtc90A-iw2sb0JFOQqQp2-xFOj4LAeofj9VdNanHfwZqN-SgHj8WEs73BeESZbYYD7bgadnxru55QTgRFNpL4GzHDKgbReit5fSDgtnSGvCeTXhvgZIXeT-m_B1Dedr_Ecpb3QLl82kmK6ryr0z2W5msqMqAxeKvTHZMRzmho0va7kU6bmT_Be7A0RHy8LUn_xrgykzSmB34g5JD_w26w9nB8nSl9ZNsB24fAKQytqiAD8osXs2Ah2rKQ0HiF3lYMaXN_wgZBYkDMhYTMvAifBJwBNTXN88-l310Pe8hHWMO32NkaUJLXB1jXsoWfgBRUxfAY-0NdDAwNvk3fe-MdAQSIA0q0iwnaZUHFelK2aQs2hNQPwikxxCAxCFIvMgxhHT6ZT-7YyUKpxl9XqsP8eURZ6BIUKplRdW0OYQPYA7yoz53D1tS9ZK-H5KhR3yBAkHNE9MyjpscUZqsd8TKOKoka6XIvUssS7olR-dRNtEsUdiGl-hOsvZj9PAoAzXyUI1igVuCDuQvkxuXKU6XxZ93PT-pUxEeSVkZTw8WF6hV7A7UyROdtAjTRt4BXThijuR2g3BOu1aOW9frI9G_dXXvSzhvCL1ddyJM-H7t0YeWyVLudkS006A-aUP3rtm2yd6uTiwHR_wYxcRm3Ea8gR8mrNd0v08S_6MhmtG1dsNHFoPBtmFtFGFGH7on4gjnNib888nYb4fUjym-fji49VMiXHKya1oS4fKRKlwdXrX-KJvT9iinL0hJmR2Z4tRrUN_zbRDXpAN-H9D5suk-4H2URxx4fhW6WBFnTVBi_d-5iDt77Yky_tj1WV9YhMThvIvzZ4lztiNPdswDm0Eyn0y0A557DfTC0PrPeG8xqn3sUNmk1MHFomjfysuPstHPk_KjbL4wHZ7uv5SaH_ygJ8y6wNPThxd5HJ3lT2HTkhWwmUzYhLR61ssuj74HhcOJiuE5K_yJbH5AOevoCfjDk429zQ78HSqUA36XVuonb5Ke27bfuyZxyALoQW0YN1m-yDJkQb_32l50sPbkSg1etIs3XtNxUwKZ-VQmZDFar-20tTZEmfWRcq9eBbJwlWJi8KqtAHn5728zK_xh9ePutEaglN1wau9tqBufMBAdI8Jfx0TuDinsmfWuFlCSZhbmoAHN7pCRSAMgdlT2j4sdKn6kwAxKgI1JO3lyefasPU_bRbogZ3CelMmiyjKcLM6250kFVUKhjBctbpMubrO07GgJGKBNaFucsXMc4ywu4yTJ0jgp5h1NsjImtO1a2gKBKIthRxif21iZS7U5c5dAzxdlGuMzThrg2t2dxnhkBkf55Zk6d1dHm2GjoyzmTBv9KMEww92F68_udmKUX6KlY8_fIpUC3RHOWk-VY07Ad3S404iO7jSeDYpPb2e_4RqrV-LuHP87AAD__-r3Cjw">