<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/139511>139511</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Clang++ ICE  mixed array initializer with .y[2] = 'e' and string literal since clang 12
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          mariete1223
      </td>
    </tr>
</table>

<pre>
    The following minimal C code causes clang++ (LLVM trunk with assertions enabled) to crash with an assertion failure inside castAsArrayTypeUnsafe.

## Assertion

```
clang++: /root/llvm-project/llvm/tools/clang/include/clang/AST/Type.h:8843: const clang::ArrayType* clang::Type::castAsArrayTypeUnsafe() const: Assertion `isa<ArrayType>(CanonicalType)' failed.
```

## Stack dump 

```
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 -x c++ <source>
1.      <source>:4:25: current parser token ';'
 #0 0x0000000003f8a6d8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f8a6d8)
 #1 0x0000000003f88364 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f88364)
 #2 0x0000000003ecd158 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x0000777cf3e42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x0000777cf3e969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x0000777cf3e42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x0000777cf3e287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x0000777cf3e2871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #8 0x0000777cf3e39e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #9 0x0000000007886daf 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
#10 0x000000000788684c 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 0x0000000007886ad6 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
#12 0x00000000078881f6 CheckConstantExpression((anonymous namespace)::EvalInfo&, clang::SourceLocation, clang::QualType, clang::APValue const&, clang::Expr::ConstantExprKind) ExprConstant.cpp:0:0
#13 0x00000000078fd8ee clang::Expr::EvaluateAsInitializer(clang::APValue&, clang::ASTContext const&, clang::VarDecl const*, llvm::SmallVectorImpl<std::pair<clang::SourceLocation, clang::PartialDiagnostic>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x78fd8ee)
#14 0x000000000771ad32 clang::VarDecl::evaluateValueImpl(llvm::SmallVectorImpl<std::pair<clang::SourceLocation, clang::PartialDiagnostic>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x771ad32)
#15 0x000000000771b0e1 clang::VarDecl::checkForConstantInitialization(llvm::SmallVectorImpl<std::pair<clang::SourceLocation, clang::PartialDiagnostic>>&) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x771b0e1)
#16 0x00000000069ba3eb clang::Sema::CheckCompleteVariableDeclaration(clang::VarDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x69ba3eb)
#17 0x00000000069c1562 clang::Sema::AddInitializerToDecl(clang::Decl*, clang::Expr*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x69c1562)
#18 0x0000000006642b6a clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(clang::Declarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6642b6a)
#19 0x00000000066523e9 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+++0x66523e9)
#20 0x000000000661029e clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x661029e)
#21 0x0000000006610a59 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6610a59)
#22 0x000000000661837a clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x661837a)
#23 0x000000000661931d clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x661931d)
#24 0x000000000660b6fa clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x660b6fa)
#25 0x000000000492f0e8 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x492f0e8)
#26 0x0000000004c25545 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c25545)
#27 0x0000000004ba41ce clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4ba41ce)
#28 0x0000000004d192e9 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4d192e9)
#29 0x0000000000da8b7f cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xda8b7f)
#30 0x0000000000d9ed4a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#31 0x0000000004996179 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
#32 0x0000000003ecd5f4 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3ecd5f4)
#33 0x000000000499678f 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
#34 0x000000000495871d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x495871d)
#35 0x00000000049597ae 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+++0x49597ae)
#36 0x0000000004961a95 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4961a95)
#37 0x0000000000da4ae8 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xda4ae8)
#38 0x0000000000c2a0f4 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc2a0f4)
#39 0x0000777cf3e29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#40 0x0000777cf3e29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#41 0x0000000000d9e7f5 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd9e7f5)
```

## Program

```
#include <stdio.h>
const struct {
        char y[4];
}a = {.y[2] = 'e',"aaa"};
```

## To reproduce

It occurs since clang 12

https://gcc.godbolt.org/z/Gh3an9P3n
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzsmt1z4ygSwP8a8kLZJaHvhzwozngve7O1uUluXl0IIZsbBDpAGWf_-iuQbH3YSTZVcarublOeKZuPpvvXDbQEWGu2FZReg-gGRLdXuDU7qa5rrBg11EcouCpk-Xz9uKOwkpzLn0xsYc0EqzGHK0hkSSHBraYaEo7FFqAbgG4gQOnXr99_g0a14gf8ycwOYq2pMkwKDanABaclQBk0EhKF9a5vI4ZmsMKMt4pCJjRzo2iT61wp_Pz43NB_Co0rugRebj8oACiA-aFvXxp7_cfLR8qBIIcArZWUBqA150_1olHyX5QcfgK0NlJyDdC677ZmgvC2pKOS_OERoLXVZLkDQZ6mYWAFEym06VEEOQjyo8IA5eNyV-S-nTUMoNTiceKs3KNpEMQe0xgEq0Fy8AWgdIWFFIxg3g2WAZQ4hLRczlgMwB4MJj9g2dYNPEU2VFo9vdxbAi-7V3KrcA2x2rY1FUb3NGVj6RFZN4xTtaD7hktF1QHYYvD-wsUEQOuCiYGni5rFtvyJVbUI4WILF9LKxU1jpbemac1Sw0VtHQQXi30aL7CuF_pZGLwHwS0ThnK4qIRcPFFVSE1tPVw8wMViS8jCepTsMBMguH1VX9tYC9zonTRwURHJpVqUDG-F1IYR3Y3hgnZavIfkEP3BSstWEecZL_ctuElZkIcgyFHkIqZVigoDG6w0VdDIH1RAgBIQ3Nj_PYs38KC39w5_QZXiuEyhi1UXQvpZd1_uFRPGOe5RYWKjaGik8M-N1EZRXAMUA7SCTBgbZC7WPsSDAN14-149G4Kd8v5M-TSIw3PKrzjFom1-Fw9sKzAHKG2FW55KyKUd4hKqWmUGVdFEVUpKP0rhyvr6GyXyiarnTre_YVFyO2LaM5y0WUlh6N4sSWOnjuf-dfKDXn6SJKQKaIgi5PVGcVYAtN6n8SYOF5yJdr_YirarIEstl7FT2XUZFA6nArM4qwhszE5RXG5-MM7fJ931H6RHc3XDJIZb7RC8V-0wiQfB8VQwSpMqgLiQyrxPrOs4iE1OxPrFuwX6xSAwnQoMMprF7xPougwCs3GAJWkal7iCqx0lP748Yd5iG7XfqG65sUv6ufK_M1HayQtQalf851q2GgpcU924GZ91k8l2uxOV7Kf6aOd5cMvQV0mc0FnlP9rDBjIpzu-_Y97Sfj86Efll36h-DtsGWBhbctB01HDNKC9vKeEHSbltMKwFDzXm_N6oB2pAsBp1_A0bqhjm7A_6SOtGKqye7RgTOWnrtkKLG9rKgzKziWiXJG_uhzQkf_nh8_3gz_2Ay_gvP3y-H9DMD6lf9X4YW0C1dojS_xbYb9odTO2uypTS88L7uKO5vhPMdOhtAnCq6KmK-cNjnxO8ZMR3rN4Kg--UGKnu6obbXNKUXVWDmZqGxquI77Gyut8eE1eXjn7pFSqk5MfHjo9Otnq63V5o2YcT9omPywCdYdL9oD1-R9hBGOe2_xuAOgQDoGgGqPCo_yIgYifrWh6D_RilvZWfTutylCyHgVI8phRnBQ5oMVlyaI379aFbz-qGUxtIiuGCU0sQqwOkM3TtZPzwJ49ez8GKZGoF8aMYnbciL8vRCvQoOyXHmh_VPl0nu9JDGH-4UU7twah0YlQcoiLGs_DRVI2-j5yRV4aqw2-pclHmxihWtIbqU3O7Rqfr6skIpd0uOTbU7k8vrcbjXmupvmGxpZb5hWKhAzNgy6bYIhTQ7E1svyjZNlMwto6Jra19aCg5tXMg129P5zhMuL-P79v7_zxIP5u8Y3skj7wped9DGX2T_O9q3Qpix7ul1Z0wVHVvL94P8s0Wr3ozJ4RqbetYxSyOC_ByRAZe_pwXjt6O1H6CT7Axu6LNV-CLUJtH3OdQw9EoytCMWhokry-LX_ZdUL24V12K1CVYWGsHFsGMRRb45assHmXzlT5Rfrrt_d7gf7f03swSmOPi-I1WQyZ3dmv9TZYtt9mlVObBYEP7RObjIVgzBwjhFIJXxNVpQLgTh3Su9zgvvdzG3qk0KDzJTMMMVR5NxwqvZEl_oSJ30_uQflDSGtoXdccbH6xmr8ig5iQ1DAmKojCaPH4ru-2J8oyeF9Kw02HQcJL2hQUOfUKnILsx71xST-h5li-bdJH47fUcrJjkeWHpZ2iasPT6DsY8HROA9DVjL7IE9foN2k_SLa_EaZFUkBB_U2M2fXByR25uGVmRHR69bLHLygpOy9AKPklWXsaITsujDdMDIq_MaBlieMC-8h_duvDqI-CpQfH0JYSVcfoWI4OlYk9Unb5bmZ77hFkW-0nmkIyEVn0KsFGOqqvtpl53TubORzkvMPmxqcR0Ye8G7kNn5a9kXWNRzmfxWe8dn3dlY0fHFsAIjlFMbPvtonPtscNmQ_Z73-9-FFgzstGueY9w0tgWbIzCzOhD9Uwc5txOBalG9bbJ6DEtHx8E2w9KOK6LEgOUDKhQejgj-1UWZ5xxcrIVVeNDuHPnV13Nt1Y84Iry5wnL1_12gZO6TuMh4IN5cCVpBf-fg8MSXzZYmaX3chSEU2pRmkyzrQk15zV8sjMeUE6W7llH2-Clh-tXmuaf8ZqtN3sIpVkyE2UJpu-F8qss9MtEfpXFV6anL3_f8zrOHTL_eYif9sayhzWgnCZcWezjLHpJ7dvR90mCcCYzeMkFn4jyAtmqwzPAS2Z5SIgPSfUhEzko75aS_OSY4KUd-sNzD6vZoPck-_MIwl4VQqvxRw_ciR4GzmbH_VmZvfM2hetyFBh6c4E09OBmY_tstMHKbEZm_ekhaDgawp8nakkVwU74h_vJCe-HPnv_q7_NdXr3C6Cgv_IGuznE5HLX3WbqFhJtVEsMBMkN8HLY_7kU8hlENyGIbkFgq0ByiyEIbm3Lpa1CILrtClBCXQazAghhjAFCIDn0Oqvto4SKNkqWLaFdxZ2BkpBWaaiZODw4QR91tTtjGne1CK27e13LrSwLyc1Sqi1A6z8AWv-yC7DI7gNxVV4HZRZk-Ipe-0mYeEEUhtHV7jrJotAPQ7-K0iCsooqWXhLQrLBPmokXZ1fsGnko8iIfeUmQoGiZhHFBE5z6JKpKgigIPVpjxpd2ptqxr5jWLb32gyzy_SuOC8q1u4GJUO9DS-lKXbvLiUW71SD0ONNGDyIMM5xerwaXw7vVFwhrtqclxDaZgWw4JeiuV551ALTrXZelQM4MVZjPaF61il_PYDKza4slkfVwZ3J2k9LZqAFa92Y-XaP_BAAA___Lyg55">