<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Issue</th>
<td>
<a href=https://github.com/llvm/llvm-project/issues/91633>91633</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>
ICE in clang::Sema::tryCaptureVariable
</td>
</tr>
<tr>
<th>Labels</th>
<td>
clang
</td>
</tr>
<tr>
<th>Assignees</th>
<td>
</td>
</tr>
<tr>
<th>Reporter</th>
<td>
Woebbeking
</td>
</tr>
</table>
<pre>
Hi,
clang-18 crashes for me in the attached testcase [testcase.zip](https://github.com/llvm/llvm-project/files/15265917/testcase.zip)
```
0. Program arguments: clang++ -O2 -std=c++20 -c testcase.cpp
1. <eof> parser at end of file
2. testcase.cpp:34:1: instantiating function definition 'findDetail<false, (lambda at testcase.cpp:62:36)>'
3. testcase.cpp:37:23: instantiating function definition 'findDetail(const std::vector<int> &, (lambda at testcase.cpp:62:36))::(anonymous class)::operator()<Foo>'
#0 0x00007f362f5d9a09 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/lib64/libLLVM.so.18.1+0x9d9a09)
#1 0x00007f362f5d7430 llvm::sys::RunSignalHandlers() (/lib64/libLLVM.so.18.1+0x9d7430)
#2 0x00007f362f512ce0 (/lib64/libLLVM.so.18.1+0x912ce0)
#3 0x00007f362e441240 __restore_rt (/lib64/libc.so.6+0x41240)
#4 0x00007f36377fdf24 clang::Sema::tryCaptureVariable(clang::ValueDecl*, clang::SourceLocation, clang::Sema::TryCaptureKind, clang::SourceLocation, bool, clang::QualType&, clang::QualType&, unsigned int const*) (/lib64/libclang-cpp.so.18.1+0x17fdf24)
#5 0x00007f36377bdd8b clang::Sema::BuildDeclRefExpr(clang::ValueDecl*, clang::QualType, clang::ExprValueKind, clang::DeclarationNameInfo const&, clang::NestedNameSpecifierLoc, clang::NamedDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo const*) (/lib64/libclang-cpp.so.18.1+0x17bdd8b)
#6 0x00007f36377bdced clang::Sema::BuildDeclRefExpr(clang::ValueDecl*, clang::QualType, clang::ExprValueKind, clang::DeclarationNameInfo const&, clang::CXXScopeSpec const*, clang::NamedDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo const*) (/lib64/libclang-cpp.so.18.1+0x17bdced)
#7 0x00007f36377c2d81 clang::Sema::BuildDeclarationNameExpr(clang::CXXScopeSpec const&, clang::DeclarationNameInfo const&, clang::NamedDecl*, clang::NamedDecl*, clang::TemplateArgumentListInfo const*, bool) (/lib64/libclang-cpp.so.18.1+0x17c2d81)
#8 0x00007f3637cdd15f (/lib64/libclang-cpp.so.18.1+0x1cdd15f)
#9 0x00007f3637cd2414 (/lib64/libclang-cpp.so.18.1+0x1cd2414)
#10 0x00007f3637ccf191 (/lib64/libclang-cpp.so.18.1+0x1ccf191)
#11 0x00007f3637cd3aad (/lib64/libclang-cpp.so.18.1+0x1cd3aad)
#12 0x00007f3637cd6e4d (/lib64/libclang-cpp.so.18.1+0x1cd6e4d)
#13 0x00007f3637cc8f45 (/lib64/libclang-cpp.so.18.1+0x1cc8f45)
#14 0x00007f36375c5ae9 (/lib64/libclang-cpp.so.18.1+0x15c5ae9)
#15 0x00007f36375c423b (/lib64/libclang-cpp.so.18.1+0x15c423b)
#16 0x00007f36375be82a (/lib64/libclang-cpp.so.18.1+0x15be82a)
#17 0x00007f36375be098 clang::Sema::CheckConstraintSatisfaction(clang::NamedDecl const*, llvm::ArrayRef<clang::Expr const*>, llvm::SmallVectorImpl<clang::Expr*>&, clang::MultiLevelTemplateArgumentList const&, clang::SourceRange, clang::ConstraintSatisfaction&) (/lib64/libclang-cpp.so.18.1+0x15be098)
#18 0x00007f36375c132f clang::Sema::CheckInstantiatedFunctionTemplateConstraints(clang::SourceLocation, clang::FunctionDecl*, llvm::ArrayRef<clang::TemplateArgument>, clang::ConstraintSatisfaction&) (/lib64/libclang-cpp.so.18.1+0x15c132f)
#19 0x00007f3637c53859 clang::Sema::FinishTemplateArgumentDeduction(clang::FunctionTemplateDecl*, llvm::SmallVectorImpl<clang::DeducedTemplateArgument>&, unsigned int, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, llvm::SmallVectorImpl<clang::Sema::OriginalCallArg> const*, bool, llvm::function_ref<bool ()>) (/lib64/libclang-cpp.so.18.1+0x1c53859)
#20 0x00007f3637c5543b clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, clang::QualType, clang::Expr::Classification, llvm::function_ref<bool (llvm::ArrayRef<clang::QualType>)>) (/lib64/libclang-cpp.so.18.1+0x1c5543b)
#21 0x00007f3637afedf7 clang::Sema::AddTemplateOverloadCandidate(clang::FunctionTemplateDecl*, clang::DeclAccessPair, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool, bool, bool, clang::CallExpr::ADLCallKind, clang::OverloadCandidateParamOrder, bool) (/lib64/libclang-cpp.so.18.1+0x1afedf7)
#22 0x00007f3637b06088 clang::Sema::AddArgumentDependentLookupCandidates(clang::DeclarationName, clang::SourceLocation, llvm::ArrayRef<clang::Expr*>, clang::TemplateArgumentListInfo*, clang::OverloadCandidateSet&, bool) (/lib64/libclang-cpp.so.18.1+0x1b06088)
#23 0x00007f3637b154ff clang::Sema::LookupOverloadedBinOp(clang::OverloadCandidateSet&, clang::OverloadedOperatorKind, clang::UnresolvedSetImpl const&, llvm::ArrayRef<clang::Expr*>, bool) (/lib64/libclang-cpp.so.18.1+0x1b154ff)
#24 0x00007f3637b15875 clang::Sema::CreateOverloadedBinOp(clang::SourceLocation, clang::BinaryOperatorKind, clang::UnresolvedSetImpl const&, clang::Expr*, clang::Expr*, bool, bool, clang::FunctionDecl*) (/lib64/libclang-cpp.so.18.1+0x1b15875)
#25 0x00007f36377f398d (/lib64/libclang-cpp.so.18.1+0x17f398d)
#26 0x00007f36377f3409 clang::Sema::BuildBinOp(clang::Scope*, clang::SourceLocation, clang::BinaryOperatorKind, clang::Expr*, clang::Expr*) (/lib64/libclang-cpp.so.18.1+0x17f3409)
#27 0x00007f3637cd3c6b (/lib64/libclang-cpp.so.18.1+0x1cd3c6b)
#28 0x00007f3637cec278 (/lib64/libclang-cpp.so.18.1+0x1cec278)
#29 0x00007f3637cea103 (/lib64/libclang-cpp.so.18.1+0x1cea103)
#30 0x00007f3637cd4e51 (/lib64/libclang-cpp.so.18.1+0x1cd4e51)
#31 0x00007f3637cc1f53 clang::Sema::SubstStmt(clang::Stmt*, clang::MultiLevelTemplateArgumentList const&) (/lib64/libclang-cpp.so.18.1+0x1cc1f53)
#32 0x00007f3637d0d927 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/lib64/libclang-cpp.so.18.1+0x1d0d927)
#33 0x00007f3637d10677 clang::Sema::PerformPendingInstantiations(bool) (/lib64/libclang-cpp.so.18.1+0x1d10677)
#34 0x00007f3637d0da63 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/lib64/libclang-cpp.so.18.1+0x1d0da63)
#35 0x00007f3637d10677 clang::Sema::PerformPendingInstantiations(bool) (/lib64/libclang-cpp.so.18.1+0x1d10677)
#36 0x00007f363744af37 clang::Sema::ActOnEndOfTranslationUnitFragment(clang::Sema::TUFragmentKind) (/lib64/libclang-cpp.so.18.1+0x144af37)
#37 0x00007f363744b66f clang::Sema::ActOnEndOfTranslationUnit() (/lib64/libclang-cpp.so.18.1+0x144b66f)
#38 0x00007f3636b690bd clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/lib64/libclang-cpp.so.18.1+0xb690bd)
#39 0x00007f3636a8ec6c clang::ParseAST(clang::Sema&, bool, bool) (/lib64/libclang-cpp.so.18.1+0xa8ec6c)
#40 0x00007f3638d2a756 clang::FrontendAction::Execute() (/lib64/libclang-cpp.so.18.1+0x2d2a756)
#41 0x00007f3638c9d1b4 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/lib64/libclang-cpp.so.18.1+0x2c9d1b4)
#42 0x00007f3638da5e36 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/lib64/libclang-cpp.so.18.1+0x2da5e36)
#43 0x000055b776841660 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/usr/bin/clang-18+0x12660)
#44 0x000055b77683e3a8 (/usr/bin/clang-18+0xf3a8)
#45 0x00007f3638916389 (/lib64/libclang-cpp.so.18.1+0x2916389)
#46 0x00007f362f512a6e llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/lib64/libLLVM.so.18.1+0x912a6e)
#47 0x00007f36389160e0 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (/lib64/libclang-cpp.so.18.1+0x29160e0)
#48 0x00007f36388ddeac clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/lib64/libclang-cpp.so.18.1+0x28ddeac)
#49 0x00007f36388de0ee clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/lib64/libclang-cpp.so.18.1+0x28de0ee)
#50 0x00007f36388fa74c clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/lib64/libclang-cpp.so.18.1+0x28fa74c)
#51 0x000055b77683dc3d clang_main(int, char**, llvm::ToolContext const&) (/usr/bin/clang-18+0xec3d)
#52 0x000055b77684a6e9 main (/usr/bin/clang-18+0x1b6e9)
#53 0x00007f362e42a1f0 __libc_start_call_main /usr/src/debug/glibc-2.39/csu/../sysdeps/nptl/libc_start_call_main.h:74:3
#54 0x00007f362e42a2b9 call_init /usr/src/debug/glibc-2.39/csu/../csu/libc-start.c:128:20
#55 0x00007f362e42a2b9 __libc_start_main@GLIBC_2.2.5 /usr/src/debug/glibc-2.39/csu/../csu/libc-start.c:347:5
#56 0x000055b77683ab25 _start (/usr/bin/clang-18+0xbb25)
clang++: error: clang frontend command failed with exit code 139 (use -v to see invocation)
clang version 18.1.4
Target: x86_64-suse-linux
Thread model: posix
InstalledDir: /usr/bin
clang++: note: diagnostic msg:
```
Maybe this is a duplicate of #90669 clang-17 works fine.
Cheers,
André
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzUWk1z47ay_TX0BmUVCfBLCy9oeZRMnif2GzvzslOBQFPCG4rkBUDHvr_-FkDqAzRliZNUKjeV0shk8-D06UajAZEqJdYVwI0X3XrR3RVt9aaWN_9XQ57Dd1Gtr_Kav938LDy88Pw7z8-6T1bSan0dpIhJqjagUFFLtAUkKqQ3gKjWlG2AIw1KM6oAedHt7vvs36LxojsPpxutG-WRzMNLDy_XQm_afMbqrYeXZfmy--e6kfX_A9MeXhaiBOXhZRDhOJoHiYeXDiqeH5PsP2O__9_-6c-Q_e9R1mtJt4jKdbuFShseyLrl4VsP36LrB4yuleYeuWPdJeyja7Z3acaapoMMekiPLKAuPPIJNVQqkIhqBBVHdYEM8c4Y98YODMlI6JEsMBxEpTSttKBaVGtUtBXToq4Qh0JUwn71cFKIit-BpqL0yKKgpQIPL5CH05Juc07NyIMBYmxGiY1E5JOHk44NOcEm8UiGyY_QwSmrK6WRVS7zSPYCTNfSIwtRaaONh-MJXA3dzKZISqu6etvWrTJhUmp_q25AUjMETu21xbKuj31EHiY-8l993_eTgsS4iPic-nNkc8xCqDfVfXmUotJPmrLvz5IyMCT3RpL-saqVlkC3vQ_GIzxHduBlKfI47P69v__2ZabqWZDOAg_f-q9zO-A-PQ2jYMAoCYk_xuhrWz2JdUXLn2nFS5Cqc_OiQQ2mMyh2Bw0wA_8SJGvoIJFjJAjDAIc-Wq0kKF1LWEn9HpYZzNgCWnMHLzzCI0lS8AKH_XS0MjzBlnbftHxb0Ea3Er5RKWhemigdWX6jZQt3wEoPZyZIxyB1Kxnc14yaxB3e3I_wvB_hf0TFz2LkdV0OjP63peXzWwN9npy-01a2_nKTSshOHMt6JLxdxWVN40Qm6JRypIxcKXPO03zc0dtWlNxI9RWKT6-NvFjIgxfOZYNhnxrRzQBRaUX7lW7hc1XUO4eHGv0KSgM3Vk8NMFEIkPc1GxrRLfAfCPMzbJuSasj6un8vlD4mM019K66jfjxUnwH_r1J_8fvvT6xurPZHovwjxWfAHfETV3yGeRqcEf9IlfdBGNNiqNeUxD4t2we3LhBtV4QmiGe1ccRLHfEY50FUXIzXmTt48wEeDoNwAp4xPzR0mAS-i8eKYB5cjmfNHbxgwI9QyifwM-YOHh7gxRBOwTPmDh4Z-JsWYTTBX2Pu4LlLbMQiCpfnS2fu4EUDvBCTfAKeMXfw3MoZ5ZBiejmeNXfwkiGeP0_Hi8FiA-z7wswmSU3_R7VQBWVdAUvHZqkz9w5dWyYlffsKhUcWg8J8eMB0psfPPG1pWX6zTfLnbVO-f3T30LCafGlLLe7hBcqxCnGqBnX1-Sut1sP145QA8ZS60snsxCEd5ElAcPFBHD7vNxzAl_12Y-fggaJyA_PhqrNDOSqv50I2VLSP2l-ulhXDUWtQNSOSRvNxtZaiEmozZHoHvB3J3KGSo1p8mIoWGPioMu962XMRGGalOjTfe4K9H2ap6x-4kOlBogcp1qKi5YKWZSbXZvv5ftE8xt3tb1fSZoQxQLt95acpke0CdxxZPFi_oigkJ_ryTuqh0uriiF7QPEwoXYei9ddHdBeBD_dQ77rcfgaWVClRiMOcPxvHc-7ux7TBnhxyE1En5G6LQQvgRTIe8ozvZ9bDC8iypnxBKy441fAjcTdXM8ZAqUcq5N-UFO-YP4E-EeiRgJtJeohudndvLozsZd6N8kgl3T5IDvJHOuEuKk7Y3E4u92M_PdE5ZJwfCm8DFTdq1vX3ttmzG0zbwXbh7O7ph4NxJshTwna5mJ1WjphuG5sHUVicWP474XZsgN-K6qFx1fuA6ogV8If-bHAkjX6rJKi6fAH-BNosIk7HNE32yTJZFRyZwqFMaRKd6JIkHFWJUZk-bIduRUXl2w8rMyLCyasfzPZ3C8gk9dLE2dvgwZlXQebp5XuvztzBi4d4oX-iC7MHCWMhYLVZuyYdj5yNzBnBpxwbGo8cl5PhdpjFl2_nOnMHb3CcAAwn6eV41tzBGzTGQAOfTMAz5sd4ZNCO8RCiCccJ1tzBGxwnsKCIyHjKPLW50k96qwcZY68Mg3vxLm9Co2K5OeTdFY_7fI5PNCpH27PDFN79FvTnNmXjPcLlfnW0Hb_cxYcHfpyc8OsRZFHL7SNUXFTrg5eirswKPpmLHcrhEg41pvGJBPlna0xjN3eif5DGbt0OQ1qQUw030w_Vp4o_FM-SVqq0LH6rhF5KurYbW1fnw3bmt51FV6Av59vRcfgmA755HJ9ojk7yPfV74EkSZgyHhFOp4zye-7nzk8Wj_TX76Ptz3diK1OWV05819F8tPGo5PDtg5U-ybhvbR42cZR38_FLztoTP26aW-knb3c-U4taxd9xzFo6YpsBi9s697Ol5JOBje5eLqXQjHVMJnTUn5ZgmUexMWFlXGiqedSc4_eoOrLWbwAlj4w7bGdxZoFI250Eeuida20aUILt5ycAZPhs7U3LZTooT7sZ3CGJXHRoBid0-x1I58HzZl730Iz8mtUa4G9chtltFoihPkjgNgzj2EWPBaktFdfJYYUPfnfq61_ACvdSCO_xaJT28zA3ssiMYpN3ExXHsO6xClxUBQtNzKAWhTlcVOsU7nQfm42KpOnMHLx6-YUBjONpMLSRVm6_A6heQbwuTPq-6u_O1rZ5oAeWbo-fgHMfIdeY8buzlBRqDQzIZOu2Df5xoXIqXXcFbLIJFvd3Sig-n42jU96-91I3hTUuPLI6OLbUU1bovgl1K7B9YrdjraxB0f-RUCbZS1rzPJcfYXFhpSYVWu9sDOFqWZnbYN292943JURdg0657W2dCxH1w09BZPdKUc6DspJh2atJ3xW2nsDOPBw8ag1Mb0Q9Ms8FJxjR_O3ccf-cDf8EHmOrvL3WuTjv7S52_-wXno6PvfcwbKnYvWk3Qp0-MP6WSEeFYpchd6dKCJuHJrLg7-u7U-JHifkrdv1Gly-tj57ajSzAo2pyRvtfaLSY7XnbKZ--OZJ_ruuwL58jm72ThB0acrijCgzWNxjBHhsLZhSiP3R-Co8G7YJgGhY9WK6PLSmkq9YrRslz14D2ykszDSw55u_bwcm2Mr_GMzM1wqvXwcjYzVm-KQ6M8vKwaXfZiD0FnG49kSeiRjBxIhUNSOJ8j-4jZR03l0X21N-3gM-aRLMCpRzLsHwaNxgZ1lLBBDv2f7j_fLlZ4hmfRX0KFhIlHsujAJB7kGc1xhDoO5wKc5_hwuNZND_v6q0cyBFKaFaV_UxYVfQeIWD9dCipK4OgPoTcIXoVJUQ4oIDY_WwXo-gXpGikAJI7at-PB0AtIJeoKmXk0C7s7z1SuwXQK6DWNV3F4rVoF16Wo2tfeYCOBcrStOZTGrKmV6G_ZPrAsgd8JS93xfczJqtam-UVc0HVVKy0Y2qq1fXTsjeLu8wt9ywHpjVBIKEQRb5tSMKoB1YV9G8aP4_4I8TpI0B-1_K5QISqYHaMsNmBf8exfts4qLr0F8bL5Fb8hfE7m9ApugiSIcJKEPrna3HAogpBHacJIQDCbh8WcsoRHfpRAjGl4JW6wj0M_8udBEsUhmeVRWqRJngbzEKLIT7zQhy0V5cwUmVkt11dCqRZuTHdHrkqaQ6ns--EY90JhL7q7kjf25ey8XSsv9EuhtDogaKFLuPm8-IREdelrnFetLG8mvxJuuZoCYen-JwAA__9vBd_8">