[clang][OpenMP] Assertion `CSI && "Failed to find CapturedRegionScopeInfo"' failed.

Reproducer:
https://godbolt.org/z/qnWrjc95s
```cpp
int &foo = []() {
#pragma omp target
foo(42);
};
```

Backtrace:
```console
clang++: /root/llvm-project/llvm/tools/clang/lib/Sema/SemaOpenMP.cpp:2476: clang::VarDecl* clang::SemaOpenMP::isOpenMPCapturedDecl(clang::ValueDecl*, bool, unsigned int): Assertion `CSI && "Failed to find CapturedRegionScopeInfo"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and dumped files.
Stack dump:
0. Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/clang++ -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 -fopenmp
1. :4:1: current parser token '}'
2. :1:12: lambda expression parsing
3. :1:17: in compound statement ('{}')
#0 0x00000000044b9718 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x44b9718)
#1 0x00000000044b6974 llvm::sys::RunSignalHandlers() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x44b6974)
#2 0x00000000044b6fac llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x44b6fac)
#3 0x00000000043f35c8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#4 0x000075cc6b045330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
#5 0x000075cc6b09ec0c pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x9ec0c)
#6 0x000075cc6b04527e raise (/lib/x86_64-linux-gnu/libc.so.6+0x4527e)
#7 0x000075cc6b0288ff abort (/lib/x86_64-linux-gnu/libc.so.6+0x288ff)
#8 0x000075cc6b02881b (/lib/x86_64-linux-gnu/libc.so.6+0x2881b)
#9 0x000075cc6b03b517 (/lib/x86_64-linux-gnu/libc.so.6+0x3b517)
#10 0x0000000007675db0 clang::SemaOpenMP::isOpenMPCapturedDecl(clang::ValueDecl*, bool, unsigned int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7675db0)
#11 0x0000000007367757 clang::Sema::getNonOdrUseReasonInCurrentContext(clang::ValueDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7367757)
#12 0x00000000073b7cb1 clang::Sema::BuildDeclRefExpr(clang::ValueDecl*, clang::QualType, clang::ExprValueKind, clang::DeclarationNameInfo const&, clang::NestedNameSpecifierLoc, clang::NamedDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x73b7cb1)
#13 0x00000000073b844f clang::Sema::BuildDeclRefExpr(clang::ValueDecl*, clang::QualType, clang::ExprValueKind, clang::DeclarationNameInfo const&, clang::CXXScopeSpec const*, clang::NamedDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x73b844f)
#14 0x00000000073bdccb clang::Sema::BuildDeclarationNameExpr(clang::CXXScopeSpec const&, clang::DeclarationNameInfo const&, clang::NamedDecl*, clang::NamedDecl*, clang::TemplateArgumentListInfo const*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x73bdccb)
#15 0x00000000075534d7 clang::Sema::BuildCaptureInit(clang::sema::Capture const&, clang::SourceLocation, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x75534d7)
#16 0x00000000077cf926 clang::Sema::ActOnCapturedRegionEnd(clang::Stmt*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x77cf926)
#17 0x0000000007661867 clang::SemaOpenMP::ActOnOpenMPRegionEnd(clang::ActionResult, llvm::ArrayRef) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7661867)
#18 0x0000000006efb10b clang::Parser::ParseOpenMPExecutableDirective(clang::Parser::ParsedStmtContext, llvm::omp::Directive, clang::SourceLocation, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6efb10b)
#19 0x0000000006f06586 clang::Parser::ParseOpenMPDeclarativeOrExecutableDirective(clang::Parser::ParsedStmtContext, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6f06586)
#20 0x0000000006f2760c clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&, clang::LabelDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6f2760c)
#21 0x0000000006f28af6 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::LabelDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6f28af6)
#22 0x0000000006f3107e clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6f3107e)
#23 0x0000000006eb8b92 clang::Parser::ParseLambdaExpressionAfterIntroducer(clang::LambdaIntroducer&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6eb8b92)
#24 0x0000000006eb9c8b clang::Parser::ParseLambdaExpression() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6eb9c8b)
#25 0x0000000006e9ed55 clang::Parser::ParseCastExpression(clang::CastParseKind, bool, bool&, clang::TypoCorrectionTypeBehavior, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6e9ed55)
#26 0x0000000006e9f657 clang::Parser::ParseCastExpression(clang::CastParseKind, bool, clang::TypoCorrectionTypeBehavior, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6e9f657)
#27 0x0000000006e9f6e9 clang::Parser::ParseAssignmentExpression(clang::TypoCorrectionTypeBehavior) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6e9f6e9)
#28 0x0000000006ec89b0 clang::Parser::ParseInitializer(clang::Decl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6ec89b0)
#29 0x0000000006e5707e clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(clang::Declarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6e5707e)
#30 0x0000000006e77089 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+++0x6e77089)
#31 0x0000000006e2219b clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6e2219b)
#32 0x0000000006e2298f clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6e2298f)
#33 0x0000000006e2f3f8 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6e2f3f8)
#34 0x0000000006e30335 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6e30335)
#35 0x0000000006e30720 clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6e30720)
#36 0x0000000006e0c7fc clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6e0c7fc)
#37 0x0000000004fcee98 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4fcee98)
#38 0x00000000052efb78 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x52efb78)
#39 0x000000000527d78d clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x527d78d)
#40 0x00000000053c439d clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x53c439d)
#41 0x0000000000d9173c cc1_main(llvm::ArrayRef, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd9173c)
#42 0x0000000000d8845a ExecuteCC1Tool(llvm::SmallVectorImpl&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr) driver.cpp:0:0
#43 0x0000000000d885dd int llvm::function_ref&)>::callback_fn&)>(long, llvm::SmallVectorImpl&) driver.cpp:0:0
#44 0x0000000005043169 void llvm::function_ref::callback_fn>, std::__cxx11::basic_string, std::allocator>*, bool*) const::'lambda'()>(long) Job.cpp:0:0
#45 0x00000000043f39c4 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x43f39c4)
#46 0x0000000005043cd5 clang::driver::CC1Command::Execute(llvm::ArrayRef>, std::__cxx11::basic_string, std::allocator>*, bool*) const (.part.0) Job.cpp:0:0
#47 0x0000000005002102 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5002102)
#48 0x0000000005006a67 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5006a67)
#49 0x0000000005010fc5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5010fc5)
#50 0x0000000000d8dc4a clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd8dc4a)
#51 0x0000000000ccb5ea main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xccb5ea)
#52 0x000075cc6b02a1ca (/lib/x86_64-linux-gnu/libc.so.6+0x2a1ca)
#53 0x000075cc6b02a28b __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28b)
#54 0x0000000000d87e05 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd87e05)
clang++: error: clang frontend command failed due to signal (use -v to see invocation)
Program terminated with signal SIGABRT (6)
Compiler returned: 134
```

Reproduce the crash with the Compiler Explorer example and inspect clang/lib/Sema/SemaOpenMP.cpp around line 2476, following the SemaOpenMP::isOpenMPCapturedDecl call in the backtrace. Trace how the lambda and OpenMP captured-region state are handled; done means the reproducer no longer triggers the assertion and the regression is covered by an appropriate test.

Written by the indexing model from the issue text.