<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/61667>61667</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Clang OOM on program with large integer in nested designator
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

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

    <tr>
      <th>Reporter</th>
      <td>
          langston-barrett
      </td>
    </tr>
</table>

<pre>
    ```c
// https://godbolt.org/z/84fdeMsEz
struct A { int b[1]; };
A t[0] = { [0xffffffffffffffff].b[0] = 0 };
```
```
<source>:2:12: warning: nested designators are a C99 extension [-Wc99-designator]
A t[0] = { [0xffffffffffffffff].b[0] = 0 };
 ^~~~~~~~~~~~~~~~~~~~~~~~~
<source>:2:12: warning: array designators are a C99 extension [-Wc99-designator]
A t[0] = { [0xffffffffffffffff].b[0] = 0 };
           ^~~~~~~~~~~~~~~~~~~~
LLVM ERROR: out of memory
Allocation 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 -c -O0 -emit-llvm -Xclang -disable-llvm-passes <source>
1.      <source>:2:43: current parser token ';'
 #0 0x000055b12dc8b07f llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x401107f)
 #1 0x000055b12dc88dbc llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x400edbc)
 #2 0x000055b12dbd6428 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007f97cf7f9420 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x14420)
 #4 0x00007f97cf2c600b raise (/lib/x86_64-linux-gnu/libc.so.6+0x4300b)
 #5 0x00007f97cf2a5859 abort (/lib/x86_64-linux-gnu/libc.so.6+0x22859)
 #6 0x000055b12dbe17cf (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f677cf)
 #7 0x000055b12dbe17eb (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f677eb)
 #8 0x00007f97cf68bc12 operator new(unsigned long, std::align_val_t) (/lib/x86_64-linux-gnu/libstdc++.so.6+0xaac12)
 #9 0x000055b131432c6d llvm::BumpPtrAllocatorImpl<llvm::MallocAllocator, 4096ul, 4096ul, 128ul>::Allocate(unsigned long, unsigned long) (.constprop.0) Expr.cpp:0:0
#10 0x000055b13144cf25 clang::ASTVector<clang::Stmt*>::grow(clang::ASTContext const&, unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x77d2f25)
#11 0x000055b13144d1ce clang::InitListExpr::updateInit(clang::ASTContext const&, unsigned int, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x77d31ce)
#12 0x000055b130ab2ad9 (anonymous namespace)::InitListChecker::getStructuredSubobjectInit(clang::InitListExpr*, unsigned int, clang::QualType, clang::InitListExpr*, unsigned int, clang::SourceRange, bool) (.constprop.0) SemaInit.cpp:0:0
#13 0x000055b130acb9cd (anonymous namespace)::InitListChecker::CheckDesignatedInitializer(clang::InitializedEntity const&, clang::InitListExpr*, clang::DesignatedInitExpr*, unsigned int, clang::QualType&, clang::DeclContext::specific_decl_iterator<clang::FieldDecl>*, llvm::APSInt*, unsigned int&, clang::InitListExpr*, unsigned int&, bool, bool) SemaInit.cpp:0:0
#14 0x000055b130acc67f (anonymous namespace)::InitListChecker::CheckDesignatedInitializer(clang::InitializedEntity const&, clang::InitListExpr*, clang::DesignatedInitExpr*, unsigned int, clang::QualType&, clang::DeclContext::specific_decl_iterator<clang::FieldDecl>*, llvm::APSInt*, unsigned int&, clang::InitListExpr*, unsigned int&, bool, bool) SemaInit.cpp:0:0
#15 0x000055b130ac78cc (anonymous namespace)::InitListChecker::CheckArrayType(clang::InitializedEntity const&, clang::InitListExpr*, clang::QualType&, llvm::APSInt, bool, unsigned int&, clang::InitListExpr*, unsigned int&) SemaInit.cpp:0:0
#16 0x000055b130ac85fb (anonymous namespace)::InitListChecker::CheckListElementTypes(clang::InitializedEntity const&, clang::InitListExpr*, clang::QualType&, bool, unsigned int&, clang::InitListExpr*, unsigned int&, bool) (.constprop.0) SemaInit.cpp:0:0
#17 0x000055b130ab829d (anonymous namespace)::InitListChecker::CheckExplicitInitList(clang::InitializedEntity const&, clang::InitListExpr*, clang::QualType&, clang::InitListExpr*, bool) (.constprop.0) SemaInit.cpp:0:0
#18 0x000055b130ab8c66 (anonymous namespace)::InitListChecker::InitListChecker(clang::Sema&, clang::InitializedEntity const&, clang::InitListExpr*, clang::QualType&, bool, bool, bool) SemaInit.cpp:0:0
#19 0x000055b130ac1160 TryListInitialization(clang::Sema&, clang::InitializedEntity const&, clang::InitializationKind const&, clang::InitListExpr*, clang::InitializationSequence&, bool) SemaInit.cpp:0:0
#20 0x000055b130abf24b 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+++0x6e4524b)
#21 0x000055b1306d45bf clang::Sema::AddInitializerToDecl(clang::Decl*, clang::Expr*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a5a5bf)
#22 0x000055b13039a82e clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(clang::Declarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x672082e)
#23 0x000055b1303abdb8 clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6731db8)
#24 0x000055b130374452 clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66fa452)
#25 0x000055b130374d0f clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (.part.0) Parser.cpp:0:0
#26 0x000055b13037b799 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6701799)
#27 0x000055b13037c0ed clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x67020ed)
#28 0x000055b13036ffba clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66f5fba)
#29 0x000055b12eeb2c48 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5238c48)
#30 0x000055b12e717cb9 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4a9dcb9)
#31 0x000055b12e69c1e6 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4a221e6)
#32 0x000055b12e7fbe77 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b81e77)
#33 0x000055b12b2124c6 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x15984c6)
#34 0x000055b12b20e2ea ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#35 0x000055b12e4fccdd 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
#36 0x000055b12dbd6910 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f5c910)
#37 0x000055b12e4fd59f 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
#38 0x000055b12e4c4ddc clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x484addc)
#39 0x000055b12e4c587d 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+++0x484b87d)
#40 0x000055b12e4cd52d clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x485352d)
#41 0x000055b12b210970 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x1596970)
#42 0x000055b12b11c4d5 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x14a24d5)
#43 0x00007f97cf2a7083 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x24083)
#44 0x000055b12b208ffe _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x158effe)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134
```

I didn't find any other OOMs with nested designators: https://github.com/llvm/llvm-project/issues?q=is%3Aissue+nested+designator+
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzsWtlz2zh4_2voFww9JHg_-EGWrW22yTiNPNu-aXB8lNFQABcAHXkf-rd3QOoCJXsdr5Rpp_UktoTjO37fCYLEGLGUADdBdhtkd1eks09K3zRELo1VMqREa7D2iir-chPk0fCPBdFdEE0CPAvwDD1Z25og2XxdKk5VY6-VXgZ49leAZ2Vac_hi7v8adhmrO2bRBAXFLRLSIhpkt3GQ3QXJLQoK92dYOEE2yG6jILtDQXLXL3ff1_XoJ8jurunhysgjs5P69NdkalSnGQTJfZBMcJBMYvcL_SBaCrl0HyUYCxxxcFgRq7RBRAMiaFpVCNYWpBFKOuHCf2dVFe4XOq3OqQsKsvv_euXn_foQrcnL_wh19j-nFRuWff78xxd0_-3bwzcnveosUjVawUrpl404TaMYsU7qmogG-DD89fP9ZH6PTEdXwiKCaLdEGlqlLbJq7LbCPnX0mqlVgGdN87z9E7Za_ScwG-CZMKYD4zyeSI6EZE3HAdknQEwT84QoYd-tJgwCPEWthlYrBsYARxuL4Gm_kxijmCDOpXQnkWFatPZ6EHluCfuOeLdqnWT9UHQdRNVXrZaarBDRy24F0jrBUYBnqnWSMbVqRQM6hHXbKA3ajbkYDokxoB0wJrS6k98DPKNCbqcDfBvgWxQu-Q-i6zBF4RKFytElbeuod7bt7LVB4cphgcJwXeYhMavQvEhL1kFyJ6SFBoVzFIZLxkKrVMOeiJBBcvemeG6xkaQ1T8qisGaqUTrkgiylMlYwg8JaqrAH1h9mKHyIUAgrYcNBqP_odUEhF4bQBsLBbE5zg7xw6OGMHZwnoiRNHKSs0xqkRS3RBjSy6jtIFODCuSwutkGIkwhF6yiKoiyjMeaspFFRo95tkkmQTMyLGT581ULa3qiPg2eU-0Wa_FgoYzWQVYBz5x1C2gBXKMDlmUwb4NtonUZxHBV1gKu9_PFI_pJTdkr-aQNEdu2DnLsU0AS47GRfMThqlONyAWkj4JR50mJPWsrzFJdo6nzjGzD1DPplEO9fiOSNY1pukPTWTJW0sLbXrHXBFfX_dyySDYuirgpWF3WV4ggtFhqMVRoW2m70bAQN8Gxd5os8DRshu3W4lN0w0donDYRfG3Ud9brEaYojT5PUY4NZHkUUaSIMvIM-c5TzAaUkiqhHOfMpk6zMKkSoepfkB5QxLrPKo5z76ENcsPrcVk_qvCiY76PFEV-gF-ELPpKlh2ReUhZjpFrQrgQiCT-Oo2CKjOVDxJBGLOXimTSLg1h-C3tjORvE2RuBEBZjT6jqAIwkThPMcn4QsLfdqv1q9aYQKv1p1TZBMt0v-ELc1G7eiZxGVd41_qcYl10zJMUg2dZVOKXwqTxwzZQ0ttWqdQFQoft1q4_DzaWfyFcnZTXO0GCcgfP88Q9gTtBkejA8tysb4MlOwKVWzhr-xk2co16YTWa9dNYqCo5rnO1M5nSMRzrymMGhjp-ksJ-FsQ6lYaRrObHgxn9OqT7bTQ9p9zTx5DKaJrGrZAeaHubnJCIUE97zJVLJl5XqDJJkBaYlwz5P--kTsO-wAWAJdt4fDzoNfN5RRV3vdQyIB51T800w_q0jzeNLC6PhnyMy7_uFb0QuezpUqeYVr5_Dijjapz0_8bFitGL8Q1j1X-42vTlwt0aQRvzV17-RmsMEv5dW2BfPh97G42DW5_SzwI953QFrNi696ThaYKIWbMGBNQthh2zrR_9MQMPdThf_A_N9gpt8nX-S9qRM71D0xIbBwntLv23WdGRWlhf1_5v1f71Zs5FZi5Kxj5t14g7eA3IXMOXILMcY7pX_50D-HXD5CLgyq-nHgeulacCdfJ2G5lfgdz6s_kG1KEaVtcTVP6gW9-u2EUzY7YpfAePb-z4MTDkGhuX5h4AZD3qQOBlO63E5f_u5BFWN4iyO8wg96hfHdidn_2js7JrtSf-rkPxjGPh05vBnB5LBKGreRABHI0-ocUrfwWKk70yr1a9E6OBk1llCG-hrwzeo_dq4Rc1VxmPXOHNrn0Oa4ZQetvbYO8REOU8zWqMxSkOV4YfNyqPqK7qH6DAydoHT2eCsepGMZLT29PKPLElFSuwdzr72DwAPPjvhie6NOakt6O13pSeST6zVgnZ2XJn2i44d5IgDf4RV2_QHwFq95laHu2ZK9-eR4Xx0icNeXuCoxN5hD_sHmIRQTsu_Re43rbrWx8bNCbl0s_MW2OlmcgBv21KegMKDfkxhOLN93twNHLverwYziTktPTD9Y0NSpGmG_xbMBz3rJHMs76D-JC3o4dHsT2HzvhVvGmjCGBgzH1p8h8j5IctrkmbYgywbQ8aj-r2R6yEnXLYa18WLADf2u9PAXbdE26H3GXQ4Xe_ykf60qKo39b9fDx5ygMOv0fkCERTFRVV57lCM4GAR8DfheFTtZ3iG5rg-PbTkzw6-2tH5dJe_-up8fyLN7GrgF8W7Bj6tWqXt3PZPTvPL4IAj4B4OfkOc5HVNyREOk_njq03OpZuLvM5qSjyZD5tXDEAxS71SMlUcfgM56SN22y0A6yxshpyIZ5c0w0nJUi9P-_d9UMQFo17QzbQrUZKfEPUyQqak4ox6oeBf6kFesRhyH86B7SdpLNn1wGNEX9fqIr6cEoxjyD1FsI92TaEo_JaxF3mvz_OuxJdv6XuRpJTSMoai8BQ47JEwxTFOWY4Yixcr4mgcXAIftv1PRG_bvm3H74_hKXpWgl9GjzirypT5hkh9PSLAQNAW_Wn82KeKA23mK9I0w8XN5gbqWKnR8cfROL7cqBDX4vmVEphknn-kNWOc98gc0K03hX6he3D72SEUd7dHjDQNJez7opZ-xh94b5xoGk_VakUkH0f1SSPu7gFV67gT_xZubrWQy00dGSy827BYsPU6jocvlBjBFqZfvkHRW-wGFlYTYc12ekSO7K769vO756tDju-9aMC83xLgoiErykmAiz1UuNzemf2u6Gl75OP7-SqODkxx6hZ-mPnWyTmpoXnx4HzbdOf3_KTOWBVHnucXIxfjWeV1mf_nXGTUob7qC6UPHEs5Z68C19uOHJXMLZpeNh9tdAteOyS_sXQyera00-2sJaFMCefMc6hqhEtWFvxncfldUfM6KL8r-lkY-8pjpuPUvPODlgjnAscXPW_iuHGWX4ImLQuv202jEZo8w6-ieXfw2escTrQMr1nhF6J5_galzJIM-_jFowYlqopokHXbomzl79PK5Ohe7rWyff6mJK8KLzWnXndI45ilPENO6rMzTwlOufdSR5qMXrMqojJBi0UjqMvFRNvFgSTvfeUqjcrE4zLuu8q6BjTQPz_CJdT1_hHf4XwyQaC1qw-TwTlQvTkRILZx4OF9W_RD2CcEa-GcgQOKk9TJ2RlA4TOyChkAJA7a9A2zbYeONNhOS3Ah5DafflW7__0JccFlgAuLaiE5IvIFKfsEGj08fDGDIMcvbDu6H33hN5n9GSR3wgQ4Syb9WIBvBxYBvj14OxrfXvGbhFdJRa7gJs6LKo-KtCivnm6qIk9qFmWMZ4DziFRRDCStIKlJFddFciVucISTKMEJjpMiK6_jilU4iWNeFRhohIM0ghURzbUT8lrp5VUvyk0e53lx1RAKjenf4sdYwg-0kRMH2d2VvukVo93SBGnUCGPNnooVtoGbaW_dh4cvSEnUbl427rFsiF4621lYgkZCHoN71enm5uNvU_cK_HcAAAD__7y4AW8">