<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/138653>138653</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            ICE / LLVM ERROR: Out of memory when compiling large std::array<shared_future<...>> with additional unexpected behaviours (C++23, Clang 19–21)
        </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>
    ## Summary

LLVM ERROR: out of memory strange error, it occurs with std=c++23 and versions 19, 20 and current, it has been found that in current version if you remove #include <thread> the compiler does not crashes but in version 20 and 19 it does. 

## Assertion

No assertion given

## 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++ -std=c++23 <source>
1.      <source>:9:81: current parser token ';'
2.      <source>:8:12: parsing function body 'main'
3.      <source>:8:12: in compound statement ('{}')
 #0 0x0000000003f70b58 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f70b58)
 #1 0x0000000003f6e7e4 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f6e7e4)
 #2 0x0000000003eb36a8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007d9110042520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007d91100969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x00007d9110042476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x00007d91100287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x0000000003ebeeab (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3ebeeab)
 #8 0x0000000003ebeec5 (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3ebeec5)
 #9 0x00007d91104ae9a3 operator new(unsigned long) (/lib/x86_64-linux-gnu/libstdc++.so.6+0xae9a3)
#10 0x00000000074b318c clang::APValue::MakeArray(unsigned int, unsigned int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x74b318c)
#11 0x000000000788d422 (anonymous namespace)::ArrayExprEvaluator::VisitCXXParenListOrInitListExpr(clang::Expr const*, llvm::ArrayRef<clang::Expr*>, clang::Expr const*, clang::QualType) ExprConstant.cpp:0:0
#12 0x00000000078c4faf clang::StmtVisitorBase<llvm::make_const_ptr, (anonymous namespace)::ArrayExprEvaluator, bool>::Visit(clang::Stmt const*) ExprConstant.cpp:0:0
#13 0x00000000078c65cd EvaluateArray(clang::Expr const*, (anonymous namespace)::LValue const&, clang::APValue&, (anonymous namespace)::EvalInfo&) ExprConstant.cpp:0:0
#14 0x000000000788bd11 EvaluateInPlace(clang::APValue&, (anonymous namespace)::EvalInfo&, (anonymous namespace)::LValue const&, clang::Expr const*, bool) ExprConstant.cpp:0:0
#15 0x000000000788ed06 (anonymous namespace)::RecordExprEvaluator::VisitCXXParenListOrInitListExpr(clang::Expr const*, llvm::ArrayRef<clang::Expr*>) ExprConstant.cpp:0:0
#16 0x00000000078c94bf clang::StmtVisitorBase<llvm::make_const_ptr, (anonymous namespace)::RecordExprEvaluator, bool>::Visit(clang::Stmt const*) ExprConstant.cpp:0:0
#17 0x00000000078ca038 EvaluateRecord(clang::Expr const*, (anonymous namespace)::LValue const&, clang::APValue&, (anonymous namespace)::EvalInfo&) ExprConstant.cpp:0:0
#18 0x000000000788bd81 EvaluateInPlace(clang::APValue&, (anonymous namespace)::EvalInfo&, (anonymous namespace)::LValue const&, clang::Expr const*, bool) ExprConstant.cpp:0:0
#19 0x00000000078cf690 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+++0x78cf690)
#20 0x00000000076ecf42 clang::VarDecl::evaluateValueImpl(llvm::SmallVectorImpl<std::pair<clang::SourceLocation, clang::PartialDiagnostic>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x76ecf42)
#21 0x00000000076ed0ba clang::VarDecl::evaluateValue() const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x76ed0ba)
#22 0x0000000006a256d8 clang::Sema::FinalizeVarWithDestructor(clang::VarDecl*, clang::RecordType const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a256d8)
#23 0x000000000698dd5b clang::Sema::CheckCompleteVariableDeclaration(clang::VarDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x698dd5b)
#24 0x00000000069957b2 clang::Sema::AddInitializerToDecl(clang::Decl*, clang::Expr*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x69957b2)
#25 0x00000000066189e5 clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(clang::Declarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66189e5)
#26 0x00000000066286e9 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+++0x66286e9)
#27 0x00000000066313a7 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+++0x66313a7)
#28 0x0000000006631869 clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6631869)
#29 0x00000000066e1332 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66e1332)
#30 0x00000000066e203d clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66e203d)
#31 0x00000000066e9d53 clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66e9d53)
#32 0x00000000066ea51a clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66ea51a)
#33 0x00000000065f2a43 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65f2a43)
#34 0x00000000066290ed 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+++0x66290ed)
#35 0x00000000065e657e clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65e657e)
#36 0x00000000065e6d39 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65e6d39)
#37 0x00000000065ee65a clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65ee65a)
#38 0x00000000065ef5fd clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65ef5fd)
#39 0x00000000065e19da clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65e19da)
#40 0x0000000004912908 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4912908)
#41 0x0000000004c05bb5 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c05bb5)
#42 0x0000000004b851be clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b851be)
#43 0x0000000004cf9a09 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4cf9a09)
#44 0x0000000000da625f cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xda625f)
#45 0x0000000000d9c42a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#46 0x00000000049791b9 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
#47 0x0000000003eb3b44 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3eb3b44)
#48 0x00000000049797cf 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
#49 0x000000000493bc1d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x493bc1d)
#50 0x000000000493ccae 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+++0x493ccae)
#51 0x0000000004944b05 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4944b05)
#52 0x0000000000da21c8 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xda21c8)
#53 0x0000000000c27864 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc27864)
#54 0x00007d9110029d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#55 0x00007d9110029e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#56 0x0000000000d9bed5 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd9bed5)
```

## Program

```
#include <thread>
#include <future>
#include <memory>
using namespace std;
constexpr size_t kMemoryChunk = 1024 * 8;
constexpr size_t kNumberOfIterations = 2000000;
constexpr size_t kThreadsNumber = 2 * kMemoryChunk;
int main() {
    array<shared_future<short*>, kThreadsNumber * kNumberOfIterations> futures{};
}
```

## Gcc Bolt

Here it can be seen stranger behaviour when include is removed.

https://gcc.godbolt.org/z/af8eKT3ax

Here in current version with include 

https://gcc.godbolt.org/

## Additional question

I am also wondering if LLVM ERROR: out of memory programs are worth submiting an issue, thanks in advance



</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzsW1t3o7iW_jXkRcteIC6Ghzw4TtInPamTTCWr5rx5CdjYTECiJZFy-tfPkgTGwpdUeuLqnp7Tq6sKI2nr29--sEESEaJcUYBLJ7xywusL0so145c14SVI8DD2L1KWv1062Hewj57auib8zXHnjju_v__2Bd18_frw1fHniLUSsQLVUDP-hoTkhK4AAeeMO3iBSolYlrVcoO-lXCMhc8e_zhx85eAr7CNCc_QKXJSMCuQlagR29d2s5Ryo7GSsiUApAEUFa2mO5JpIVNK-Uy8ClQV6Yy3iULNXQA72S5pVbQ7I8RdyzYHkjn-D5BpQxuqmrICjnIFAlEmUcSLWIFDaatG9yA6OlygYqvMUGRo6auZCAJclo-buPxki_R20Kl-BWr2fJMleUN7WTXc7crv_3flOm6_a3KnjJo-crTipEeGrtgYqheLcwbeskQ6-7bWYwKapGAeu7lWEriZbEGIieUtfHHyblrRvNvyjySr_TngxCdBkhSZMySVNo6S3smnlVKBJXVWvNZpMNnE0IaKeiDcqycbxr0sqoUKTgrLJK_CUCVDtaPKEJpNVlk0kY1W2JiV1_OuTeFVnQUkj1kyiSZGxivFJXpIVZUKWmTBzaOvYtzco6_UYu5XjLwRreQaOf-O4c08xad3z54njz2NPsdk7UUO4AI4kewGKHDxz_Cv1tzvHB4bHjj_3sBquhpV0hYqWZtrqKnDU-FoprwX4JwUoP2Z1ox1bSCJB2Rk5OFaDZ1fO7Fpd4MRxleV9F7kbt__PL2ZuGsZIWUl5jT8Xb8JcPPKSSu1Tz5xk4OB46MTJ9yUTkgOpHRzpGFOhlphZP8W5HHzlbjp4A3jPBh_BDIJD4BcVENo2D_SpXFFSOThuqc5YOaqYmuIMUDWYASq2oELqRyRGC-WGXyFjr8DfDLZ_EJpXasa449Dqs2BUwkZOs0ZFtav_GPl-J3-WJ57nugEOsdspVZWpg283cbSMgklV0nYzWdHWNGRTwaaRhqyHDIADW2ASJUWGGpP2li9lVX1Muh4_SA_HcINZhFZCU_BR2MEsGgRHtmAczwofkZRx-TGxeuAgdjYyHwBJP91njNhh0nhv0iw8y6RZOEyaWAQGBBLiI9YAJ5JxROH78eg5Ra2QeZdQB461bDOzCmYrFc2C1PfiDBm8Oornj99I1YL58YW8wJxz8rYLpzRPePv3p8d2B20AbqWhWRznAcZqUkIZfatZKxAlNYhG582kU0Zhv9k0_OaVVK3i1tz_VopSLv71r0fCgd6XQj7wO1pKdaV6OzjeYUTdQRmjQjp4rjQfcp-W_xUKx1-MBqiu_o3qfUrSTtt_tqR6fmsUdqT6LVQ3QsdZSDGBbSayoCDFrqgnWUutIeNXRIDjLwbENXmBpYawbKSu9j5OIV6glLHKPBN7Nm3OFIQdTd9VyR-pFIVZjroZtx54isl3tLjXTt2PiEbc9z5vGt4RpVDd0YLp3u8qFoy8Ns09b6vYHX2szGP-U8D8L1nY41Qb-X0Vw5GKkLvRe0jUo5bnf2pkvqtXNPLJJEjPF2aHCDlDnM1GOhHXj7fuaDD8Hw20eC_Q4r9boCUj4xVR4o7lDmh15hQqeEpSlb8DP6X9bsPTc1cAH8P_jfBryKojkfdUk6r6Bplk_K5uKvUKpd70VFNDSm4H5JN-u7pnGdGv4_Y8j4Qr7NfbF0gdCTcdoJ40jeLTqw_D7rb6wHbZFEFWBPgAJ-YHdPRrhjUJuy9yfw-CDAUDQd6IoNxNyY8RpJGdD6YCMsC0aqeI4DDKYyupQ03M1W1Jddx8I_y_Srm-BiF5m-m8HB_Qa6-gM9lUlXRWgv5kBTsVBgWtSipK4jwP08MKLtaQvSxY3VSgLMFLklagdCG8c7Zjen6-FgbnoEVga5GEsxQf1mKe5zs57pkZkLvID5unLwV2AuXTldKwB6WsQimKvDiBcBTOAvjO9Y4x5oUE3v9mfE7zuZS8TFsJYl9d02k_c-_NkD9D3VT6CVmwY_l-d9Qt418JXYHi_Ey-YIgZaIts2nAcQfIubb9w1jY2MY_mo59qfWog29dzYK57AB7iweL9Y_zu9x9n97GT_mzmNbcD8zObed_zyeykuk-lyiZHc8h7BI_pOEjv-wbY72Ei_Mepfc9IZ6BekztQH4-pj6P3nf6vRfqfQGEc7XhvYlMInu_j097bf8h_4OPMayXbg6XcqGyTde9JOGiHmuxkrlCDfsxGB_PEx210Bhtolrc2sBc-ogiw6-d_wAZ_FdLPQZiiZCDMGxGW5KF_UoFFtwy1Je6K5W8Ojs9V1BhIA2A8AkxCj5wEfNutuY0Bv1ux7ftKxho4myMrRQY17bI6LDAJTtulV_MailLVp-O0vFONnK9auycShsi_L8_2FmIIGegKRjVb4sLpuP93zfaHazbF7cC8_ZIRQhTO4F3mH_iOu95RCdws4H5yGfCuNedZBkKotrIoFR1n8FTNyMBXNOYr93-40LJoOxrln87a2ON-Dmu5P9RW9kptFAJE4emsf7MxTnW0TD0XU-fgQmk7cBGPuCjC4nSue2bNPbxCtf-p4qEhv7XwKEeFzTY56gWNA2XN8DnkC8vbCu7qhnGpn7Bnej4aNQcSkhEJXpLvO8T86Xm0fKFw269o56pbDKQt4MCqTIPEw4lrfQhcsBx-ATrX4d1_MoKsldDdMl8tPxlmB2SAadWDQeaGaWp9M7rl6rFH8wM4z4TQYBgQWgVgkMahl4JNpJnzTq9rZHCYy-MqncV_O5yDFr7Nc5EQN7E_F2q8gzKv2wIgPqXsWVJQh29Ab5Vbbk4iHBYoy7yl2c8WH14XXZOdZahus4J1Dy_QKyvz8yhhUA46hLYOSRZggnraF96zzgsnl1H2FYrspSklY39tK0E5L1-B76-4BZGdJGaJlyaakh2h_R7CJdes6lYTetuF24xUVUqyl2VB7cRuJu5cZ-EtWF0Tmo-j-KD1tmtGrFGzk8paf36SvKSr7nFhTLsdsFxmm43nmR8pEWW2FLp7R6HVWd1YSk5KKfrmkThSVSoUzMt416667Hxan2_Xd8wQB88qUqcqHc8GqnDcb3T6laUHjDHeHeanwe4-xENb-EzL15Y-kQKqN4vL03Y7w2ZFg3hw-HjsXLPM2l_w_845FOPThnA5dY97QWKz5qeZlx9lTVuN7D0Zeyqt1D0aWOsN7YdfsU90nf-MxddO7a0rhaNixs8yAh8l5VeWiuOM_MrS-1LYWwI-sqTdbRr8URJ_2jp2R9ZApV1wJUGQuuEx2Nc711aBcKAyOGaCn0jlGapVTc9AHh7VIdjLuqK6r0R68DqVzPc2jxx7Qn967aGQDbit6s_N8CyOAqQQf_bERvQw8Wj_N07y5IMbyvWQQWA4FgiBi5ZLNWYpJOFyuaPWD08Bwc4U0ahQSyEPkRH-6XbSwrupd47dDIdzurM2-ydzjhwk2mspWtlyONRijkeZllYfF9lu9DIPuCvHnWsnhU3DkSh_h6VEL1_0sMW6pS_I8a-R5-IAOXiO4mMj_tnWKfCH4k6C-TIi9EBsCD426lmrJMxgM0BPswvAjC2pRF346ViaqZsIIUT0xlp_IdaEQ77sqViINeM7LwXjqdQk-5gd_wYZCaI7AaMnVxfHjPdLlqErVklz8x_AAZUSZYSiFJAAoP3ZNI5SWJPXkrUcfV8DRb2ZStEdHMunRshaykafR8G35pzSdMXylFVyyvjKwbe_O_iWFDH8x7NPNrvz7h9M04fftv7wQ9LtU2Z5XprqC_3WghjOm90hUiNSCYa-M5qDqq5QWaBTZ_Qa4-YCEQ7oO-NyjUSb1qVUYwlFpRAtKFvJNaEvQqlD8lf9BmogufOL_NLPEz8hF3DpzYIoxG4SJBfrywhmhR_N8gD7bhEmXkq8sMgI8XAcJuCnF-UldnHohm7kxgHGyRRnsUfctJjl7oz4Qe4ELtSkrKYqkSsqLjSeS8-Po9C_qEgKldDHFjHuQhw74fUFv1QDJmm7Ek7gVqWQYhAhS1nB5d3iBjn4dkTOg0WO9giTbRQdFeEr2ClBjzj5dDo1z0ZjaDJYq6WwaSCTkA9uJ1RqW_SH1RTTC6UI8hLnBjux6yQ-9hycXLS8uhy5SSnXbTrNWK0yq3rUmX8mDWf_DZlKlZou4eDbjrHXS_w_AQAA__8x5ecu">