[lldb][import-std-module] Clang parser assertion when lambda is imported from std module

[Michael137]

This is a follow-up to #149390

#147389 introduced code in the fstream header that was using a function local lambda. This caused following import-std-module tests to fail:

16:22:51  ********************
16:22:51  Unresolved Tests (2):
16:22:51    lldb-api :: commands/expression/import-std-module/list-dbg-info-content/TestDbgInfoContentListFromStdModule.py
16:22:51    lldb-api :: commands/expression/import-std-module/list/TestListFromStdModule.py

with following assertion:

Assertion failed: (capture_size() == Class->capture_size() && "Wrong number of captures"), function LambdaExpr, file ExprCXX.cpp, line 1277.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.

For now this was worked around by moving the lambda into a helper method. But we should really fix the underlying issue so libc++ is free to use whatever idioms they want to.

[llvmbot]

@llvm/issue-subscribers-lldb

Author: Michael Buch (Michael137)

This is a follow-up to https://github.com//pull/149390

#147389 introduced code in the fstream header that was using a function local lambda. This caused following import-std-module tests to fail:

16:22:51  ********************
16:22:51  Unresolved Tests (2):
16:22:51    lldb-api :: commands/expression/import-std-module/list-dbg-info-content/TestDbgInfoContentListFromStdModule.py
16:22:51    lldb-api :: commands/expression/import-std-module/list/TestListFromStdModule.py

with following assertion:

Assertion failed: (capture_size() == Class->capture_size() && "Wrong number of captures"), function LambdaExpr, file ExprCXX.cpp, line 1277.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.

For now this was worked around by moving the lambda into a helper method. But we should really fix the underlying issue so libc++ is free to use whatever idioms they want to.

[Michael137]

Full backtrace:

Assertion failed: (capture_size() == Class->capture_size() && "Wrong number of captures"), function LambdaExpr, file ExprCXX.cpp, line 1277.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
0  liblldb.22.0.0git.dylib  0x0000000116c424a8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 56
1  liblldb.22.0.0git.dylib  0x0000000116c401b0 llvm::sys::RunSignalHandlers() + 112
2  liblldb.22.0.0git.dylib  0x0000000116c42f8c SignalHandler(int, __siginfo*, void*) + 344
3  libsystem_platform.dylib 0x00000001871d9744 _sigtramp + 56
4  libsystem_pthread.dylib  0x00000001871cf8cc pthread_kill + 296
5  libsystem_c.dylib        0x00000001870d4860 abort + 124
6  libsystem_c.dylib        0x00000001870d3a94 err + 0
7  liblldb.22.0.0git.dylib  0x0000000116d372bc clang::LambdaExpr::LambdaExpr(clang::QualType, clang::SourceRange, clang::LambdaCaptureDefault, clang::SourceLocation, bool, bool, llvm::ArrayRef<clang::Expr*>, clang::SourceLocation, bool) (.cold.2) + 0
8  liblldb.22.0.0git.dylib  0x0000000115f6a1c8 clang::LambdaExpr::LambdaExpr(clang::QualType, clang::SourceRange, clang::LambdaCaptureDefault, clang::SourceLocation, bool, bool, llvm::ArrayRef<clang::Expr*>, clang::SourceLocation, bool) + 484
9  liblldb.22.0.0git.dylib  0x0000000115f6a308 clang::LambdaExpr::Create(clang::ASTContext const&, clang::CXXRecordDecl*, clang::SourceRange, clang::LambdaCaptureDefault, clang::SourceLocation, bool, bool, llvm::ArrayRef<clang::Expr*>, clang::SourceLocation, bool) + 232
10 liblldb.22.0.0git.dylib  0x0000000115d63aa8 clang::ASTNodeImporter::VisitLambdaExpr(clang::LambdaExpr*) + 896
11 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
12 liblldb.22.0.0git.dylib  0x0000000115d66ce4 clang::ASTImporter::Import(clang::Expr*) + 28
13 liblldb.22.0.0git.dylib  0x0000000115d28160 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Expr>, llvm::Expected<clang::Expr const*>, llvm::Expected<clang::Expr*>>::type clang::ASTNodeImporter::import<clang::Expr>(clang::Expr*) + 32
14 liblldb.22.0.0git.dylib  0x0000000115d37d84 clang::ASTNodeImporter::ImportInitializer(clang::VarDecl*, clang::VarDecl*) + 108
15 liblldb.22.0.0git.dylib  0x0000000115d440d4 clang::ASTNodeImporter::VisitVarDecl(clang::VarDecl*) + 3464
16 liblldb.22.0.0git.dylib  0x0000000115d66a90 clang::ASTImporter::ImportImpl(clang::Decl*) + 24
17 liblldb.22.0.0git.dylib  0x0000000114235e98 lldb_private::ClangASTImporter::ASTImporterDelegate::ImportImpl(clang::Decl*) + 588
18 liblldb.22.0.0git.dylib  0x0000000115d49afc clang::ASTImporter::Import(clang::Decl*) + 840
19 liblldb.22.0.0git.dylib  0x0000000115d29500 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Decl>, llvm::Expected<clang::Decl const*>, llvm::Expected<clang::Decl*>>::type clang::ASTNodeImporter::import<clang::Decl>(clang::Decl*) + 32
20 liblldb.22.0.0git.dylib  0x0000000115d29308 llvm::Expected<clang::DeclGroupRef> clang::ASTNodeImporter::import<clang::DeclGroupRef>(clang::DeclGroupRef const&) + 316
21 liblldb.22.0.0git.dylib  0x0000000115d544c0 clang::DeclGroupRef clang::ASTNodeImporter::importChecked<clang::DeclGroupRef>(llvm::Error&, clang::DeclGroupRef const&) + 72
22 liblldb.22.0.0git.dylib  0x0000000115d54354 clang::ASTNodeImporter::VisitDeclStmt(clang::DeclStmt*) + 64
23 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
24 liblldb.22.0.0git.dylib  0x0000000115d3e434 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Stmt>, llvm::Expected<clang::Stmt const*>, llvm::Expected<clang::Stmt*>>::type clang::ASTNodeImporter::import<clang::Stmt>(clang::Stmt*) + 32
25 liblldb.22.0.0git.dylib  0x0000000115d54774 clang::ASTNodeImporter::VisitCompoundStmt(clang::CompoundStmt*) + 216
26 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
27 liblldb.22.0.0git.dylib  0x0000000115d3e434 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Stmt>, llvm::Expected<clang::Stmt const*>, llvm::Expected<clang::Stmt*>>::type clang::ASTNodeImporter::import<clang::Stmt>(clang::Stmt*) + 32
28 liblldb.22.0.0git.dylib  0x0000000115d3e388 clang::ASTNodeImporter::ImportFunctionDeclBody(clang::FunctionDecl*, clang::FunctionDecl*) + 68
29 liblldb.22.0.0git.dylib  0x0000000115d3fabc clang::ASTNodeImporter::VisitFunctionDecl(clang::FunctionDecl*) + 4984
30 liblldb.22.0.0git.dylib  0x0000000115d66a90 clang::ASTImporter::ImportImpl(clang::Decl*) + 24
31 liblldb.22.0.0git.dylib  0x0000000114235e98 lldb_private::ClangASTImporter::ASTImporterDelegate::ImportImpl(clang::Decl*) + 588
32 liblldb.22.0.0git.dylib  0x0000000115d49afc clang::ASTImporter::Import(clang::Decl*) + 840
33 liblldb.22.0.0git.dylib  0x0000000115d29500 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Decl>, llvm::Expected<clang::Decl const*>, llvm::Expected<clang::Decl*>>::type clang::ASTNodeImporter::import<clang::Decl>(clang::Decl*) + 32
34 liblldb.22.0.0git.dylib  0x0000000115d3fcc4 clang::ASTNodeImporter::VisitFunctionDecl(clang::FunctionDecl*) + 5504
35 liblldb.22.0.0git.dylib  0x0000000115d66a90 clang::ASTImporter::ImportImpl(clang::Decl*) + 24
36 liblldb.22.0.0git.dylib  0x0000000114235e98 lldb_private::ClangASTImporter::ASTImporterDelegate::ImportImpl(clang::Decl*) + 588
37 liblldb.22.0.0git.dylib  0x0000000115d49afc clang::ASTImporter::Import(clang::Decl*) + 840
38 liblldb.22.0.0git.dylib  0x0000000115d29500 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Decl>, llvm::Expected<clang::Decl const*>, llvm::Expected<clang::Decl*>>::type clang::ASTNodeImporter::import<clang::Decl>(clang::Decl*) + 32
39 liblldb.22.0.0git.dylib  0x0000000115d3e7b4 clang::ASTNodeImporter::VisitFunctionDecl(clang::FunctionDecl*) + 112
40 liblldb.22.0.0git.dylib  0x0000000115d66a90 clang::ASTImporter::ImportImpl(clang::Decl*) + 24
41 liblldb.22.0.0git.dylib  0x0000000114235e98 lldb_private::ClangASTImporter::ASTImporterDelegate::ImportImpl(clang::Decl*) + 588
42 liblldb.22.0.0git.dylib  0x0000000115d49afc clang::ASTImporter::Import(clang::Decl*) + 840
43 liblldb.22.0.0git.dylib  0x0000000115d28bc0 std::__1::conditional<std::is_base_of_v<clang::Type, clang::ValueDecl>, llvm::Expected<clang::ValueDecl const*>, llvm::Expected<clang::ValueDecl*>>::type clang::ASTNodeImporter::import<clang::ValueDecl>(clang::ValueDecl*) + 32
44 liblldb.22.0.0git.dylib  0x0000000115d38890 clang::ValueDecl* clang::ASTNodeImporter::importChecked<clang::ValueDecl*>(llvm::Error&, clang::ValueDecl* const&) + 72
45 liblldb.22.0.0git.dylib  0x0000000115d613fc clang::ASTNodeImporter::VisitMemberExpr(clang::MemberExpr*) + 272
46 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
47 liblldb.22.0.0git.dylib  0x0000000115d66ce4 clang::ASTImporter::Import(clang::Expr*) + 28
48 liblldb.22.0.0git.dylib  0x0000000115d28160 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Expr>, llvm::Expected<clang::Expr const*>, llvm::Expected<clang::Expr*>>::type clang::ASTNodeImporter::import<clang::Expr>(clang::Expr*) + 32
49 liblldb.22.0.0git.dylib  0x0000000115d2faf0 clang::Expr* clang::ASTNodeImporter::importChecked<clang::Expr*>(llvm::Error&, clang::Expr* const&) + 72
50 liblldb.22.0.0git.dylib  0x0000000115d63474 clang::ASTNodeImporter::VisitCallExpr(clang::CallExpr*) + 116
51 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
52 liblldb.22.0.0git.dylib  0x0000000115d66ce4 clang::ASTImporter::Import(clang::Expr*) + 28
53 liblldb.22.0.0git.dylib  0x0000000115d28160 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Expr>, llvm::Expected<clang::Expr const*>, llvm::Expected<clang::Expr*>>::type clang::ASTNodeImporter::import<clang::Expr>(clang::Expr*) + 32
54 liblldb.22.0.0git.dylib  0x0000000115d7d1d4 llvm::Error clang::ASTNodeImporter::ImportArrayChecked<clang::Stmt::CastIterator<clang::Expr, clang::Expr*, clang::Stmt*>, clang::Expr**>(clang::Stmt::CastIterator<clang::Expr, clang::Expr*, clang::Stmt*>, clang::Stmt::CastIterator<clang::Expr, clang::Expr*, clang::Stmt*>, clang::Expr**) + 100
55 liblldb.22.0.0git.dylib  0x0000000115d63588 clang::ASTNodeImporter::VisitCallExpr(clang::CallExpr*) + 392
56 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
57 liblldb.22.0.0git.dylib  0x0000000115d66ce4 clang::ASTImporter::Import(clang::Expr*) + 28
58 liblldb.22.0.0git.dylib  0x0000000115d28160 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Expr>, llvm::Expected<clang::Expr const*>, llvm::Expected<clang::Expr*>>::type clang::ASTNodeImporter::import<clang::Expr>(clang::Expr*) + 32
59 liblldb.22.0.0git.dylib  0x0000000115d2faf0 clang::Expr* clang::ASTNodeImporter::importChecked<clang::Expr*>(llvm::Error&, clang::Expr* const&) + 72
60 liblldb.22.0.0git.dylib  0x0000000115d55388 clang::ASTNodeImporter::VisitIfStmt(clang::IfStmt*) + 196
61 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
62 liblldb.22.0.0git.dylib  0x0000000115d3e434 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Stmt>, llvm::Expected<clang::Stmt const*>, llvm::Expected<clang::Stmt*>>::type clang::ASTNodeImporter::import<clang::Stmt>(clang::Stmt*) + 32
63 liblldb.22.0.0git.dylib  0x0000000115d54bd4 clang::Stmt* clang::ASTNodeImporter::importChecked<clang::Stmt*>(llvm::Error&, clang::Stmt* const&) + 72
64 liblldb.22.0.0git.dylib  0x0000000115d553f0 clang::ASTNodeImporter::VisitIfStmt(clang::IfStmt*) + 300
65 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
66 liblldb.22.0.0git.dylib  0x0000000115d3e434 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Stmt>, llvm::Expected<clang::Stmt const*>, llvm::Expected<clang::Stmt*>>::type clang::ASTNodeImporter::import<clang::Stmt>(clang::Stmt*) + 32
67 liblldb.22.0.0git.dylib  0x0000000115d54774 clang::ASTNodeImporter::VisitCompoundStmt(clang::CompoundStmt*) + 216
68 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
69 liblldb.22.0.0git.dylib  0x0000000115d3e434 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Stmt>, llvm::Expected<clang::Stmt const*>, llvm::Expected<clang::Stmt*>>::type clang::ASTNodeImporter::import<clang::Stmt>(clang::Stmt*) + 32
70 liblldb.22.0.0git.dylib  0x0000000115d54bd4 clang::Stmt* clang::ASTNodeImporter::importChecked<clang::Stmt*>(llvm::Error&, clang::Stmt* const&) + 72
71 liblldb.22.0.0git.dylib  0x0000000115d553f0 clang::ASTNodeImporter::VisitIfStmt(clang::IfStmt*) + 300
72 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
73 liblldb.22.0.0git.dylib  0x0000000115d3e434 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Stmt>, llvm::Expected<clang::Stmt const*>, llvm::Expected<clang::Stmt*>>::type clang::ASTNodeImporter::import<clang::Stmt>(clang::Stmt*) + 32
74 liblldb.22.0.0git.dylib  0x0000000115d54774 clang::ASTNodeImporter::VisitCompoundStmt(clang::CompoundStmt*) + 216
75 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
76 liblldb.22.0.0git.dylib  0x0000000115d3e434 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Stmt>, llvm::Expected<clang::Stmt const*>, llvm::Expected<clang::Stmt*>>::type clang::ASTNodeImporter::import<clang::Stmt>(clang::Stmt*) + 32
77 liblldb.22.0.0git.dylib  0x0000000115d3e388 clang::ASTNodeImporter::ImportFunctionDeclBody(clang::FunctionDecl*, clang::FunctionDecl*) + 68
78 liblldb.22.0.0git.dylib  0x0000000115d3fabc clang::ASTNodeImporter::VisitFunctionDecl(clang::FunctionDecl*) + 4984
79 liblldb.22.0.0git.dylib  0x0000000115d66a90 clang::ASTImporter::ImportImpl(clang::Decl*) + 24
80 liblldb.22.0.0git.dylib  0x0000000114235e98 lldb_private::ClangASTImporter::ASTImporterDelegate::ImportImpl(clang::Decl*) + 588
81 liblldb.22.0.0git.dylib  0x0000000115d49afc clang::ASTImporter::Import(clang::Decl*) + 840
82 liblldb.22.0.0git.dylib  0x0000000115d29500 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Decl>, llvm::Expected<clang::Decl const*>, llvm::Expected<clang::Decl*>>::type clang::ASTNodeImporter::import<clang::Decl>(clang::Decl*) + 32
83 liblldb.22.0.0git.dylib  0x0000000115d3fcc4 clang::ASTNodeImporter::VisitFunctionDecl(clang::FunctionDecl*) + 5504
84 liblldb.22.0.0git.dylib  0x0000000115d66a90 clang::ASTImporter::ImportImpl(clang::Decl*) + 24
85 liblldb.22.0.0git.dylib  0x0000000114235e98 lldb_private::ClangASTImporter::ASTImporterDelegate::ImportImpl(clang::Decl*) + 588
86 liblldb.22.0.0git.dylib  0x0000000115d49afc clang::ASTImporter::Import(clang::Decl*) + 840
87 liblldb.22.0.0git.dylib  0x0000000115d28bc0 std::__1::conditional<std::is_base_of_v<clang::Type, clang::ValueDecl>, llvm::Expected<clang::ValueDecl const*>, llvm::Expected<clang::ValueDecl*>>::type clang::ASTNodeImporter::import<clang::ValueDecl>(clang::ValueDecl*) + 32
88 liblldb.22.0.0git.dylib  0x0000000115d38890 clang::ValueDecl* clang::ASTNodeImporter::importChecked<clang::ValueDecl*>(llvm::Error&, clang::ValueDecl* const&) + 72
89 liblldb.22.0.0git.dylib  0x0000000115d613fc clang::ASTNodeImporter::VisitMemberExpr(clang::MemberExpr*) + 272
90 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
91 liblldb.22.0.0git.dylib  0x0000000115d66ce4 clang::ASTImporter::Import(clang::Expr*) + 28
92 liblldb.22.0.0git.dylib  0x0000000115d28160 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Expr>, llvm::Expected<clang::Expr const*>, llvm::Expected<clang::Expr*>>::type clang::ASTNodeImporter::import<clang::Expr>(clang::Expr*) + 32
93 liblldb.22.0.0git.dylib  0x0000000115d2faf0 clang::Expr* clang::ASTNodeImporter::importChecked<clang::Expr*>(llvm::Error&, clang::Expr* const&) + 72
94 liblldb.22.0.0git.dylib  0x0000000115d63474 clang::ASTNodeImporter::VisitCallExpr(clang::CallExpr*) + 116
95 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
96 liblldb.22.0.0git.dylib  0x0000000115d66ce4 clang::ASTImporter::Import(clang::Expr*) + 28
97 liblldb.22.0.0git.dylib  0x0000000115d28160 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Expr>, llvm::Expected<clang::Expr const*>, llvm::Expected<clang::Expr*>>::type clang::ASTNodeImporter::import<clang::Expr>(clang::Expr*) + 32
98 liblldb.22.0.0git.dylib  0x0000000115d2faf0 clang::Expr* clang::ASTNodeImporter::importChecked<clang::Expr*>(llvm::Error&, clang::Expr* const&) + 72
99 liblldb.22.0.0git.dylib  0x0000000115d55388 clang::ASTNodeImporter::VisitIfStmt(clang::IfStmt*) + 196
100 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
101 liblldb.22.0.0git.dylib  0x0000000115d3e434 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Stmt>, llvm::Expected<clang::Stmt const*>, llvm::Expected<clang::Stmt*>>::type clang::ASTNodeImporter::import<clang::Stmt>(clang::Stmt*) + 32
102 liblldb.22.0.0git.dylib  0x0000000115d54774 clang::ASTNodeImporter::VisitCompoundStmt(clang::CompoundStmt*) + 216
103 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
104 liblldb.22.0.0git.dylib  0x0000000115d3e434 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Stmt>, llvm::Expected<clang::Stmt const*>, llvm::Expected<clang::Stmt*>>::type clang::ASTNodeImporter::import<clang::Stmt>(clang::Stmt*) + 32
105 liblldb.22.0.0git.dylib  0x0000000115d54bd4 clang::Stmt* clang::ASTNodeImporter::importChecked<clang::Stmt*>(llvm::Error&, clang::Stmt* const&) + 72
106 liblldb.22.0.0git.dylib  0x0000000115d553f0 clang::ASTNodeImporter::VisitIfStmt(clang::IfStmt*) + 300
107 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
108 liblldb.22.0.0git.dylib  0x0000000115d3e434 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Stmt>, llvm::Expected<clang::Stmt const*>, llvm::Expected<clang::Stmt*>>::type clang::ASTNodeImporter::import<clang::Stmt>(clang::Stmt*) + 32
109 liblldb.22.0.0git.dylib  0x0000000115d54774 clang::ASTNodeImporter::VisitCompoundStmt(clang::CompoundStmt*) + 216
110 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
111 liblldb.22.0.0git.dylib  0x0000000115d3e434 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Stmt>, llvm::Expected<clang::Stmt const*>, llvm::Expected<clang::Stmt*>>::type clang::ASTNodeImporter::import<clang::Stmt>(clang::Stmt*) + 32
112 liblldb.22.0.0git.dylib  0x0000000115d3e388 clang::ASTNodeImporter::ImportFunctionDeclBody(clang::FunctionDecl*, clang::FunctionDecl*) + 68
113 liblldb.22.0.0git.dylib  0x0000000115d3fabc clang::ASTNodeImporter::VisitFunctionDecl(clang::FunctionDecl*) + 4984
114 liblldb.22.0.0git.dylib  0x0000000115d66a90 clang::ASTImporter::ImportImpl(clang::Decl*) + 24
115 liblldb.22.0.0git.dylib  0x0000000114235e98 lldb_private::ClangASTImporter::ASTImporterDelegate::ImportImpl(clang::Decl*) + 588
116 liblldb.22.0.0git.dylib  0x0000000115d49afc clang::ASTImporter::Import(clang::Decl*) + 840
117 liblldb.22.0.0git.dylib  0x0000000115d29500 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Decl>, llvm::Expected<clang::Decl const*>, llvm::Expected<clang::Decl*>>::type clang::ASTNodeImporter::import<clang::Decl>(clang::Decl*) + 32
118 liblldb.22.0.0git.dylib  0x0000000115d3fcc4 clang::ASTNodeImporter::VisitFunctionDecl(clang::FunctionDecl*) + 5504
119 liblldb.22.0.0git.dylib  0x0000000115d66a90 clang::ASTImporter::ImportImpl(clang::Decl*) + 24
120 liblldb.22.0.0git.dylib  0x0000000114235e98 lldb_private::ClangASTImporter::ASTImporterDelegate::ImportImpl(clang::Decl*) + 588
121 liblldb.22.0.0git.dylib  0x0000000115d49afc clang::ASTImporter::Import(clang::Decl*) + 840
122 liblldb.22.0.0git.dylib  0x0000000115d28bc0 std::__1::conditional<std::is_base_of_v<clang::Type, clang::ValueDecl>, llvm::Expected<clang::ValueDecl const*>, llvm::Expected<clang::ValueDecl*>>::type clang::ASTNodeImporter::import<clang::ValueDecl>(clang::ValueDecl*) + 32
123 liblldb.22.0.0git.dylib  0x0000000115d38890 clang::ValueDecl* clang::ASTNodeImporter::importChecked<clang::ValueDecl*>(llvm::Error&, clang::ValueDecl* const&) + 72
124 liblldb.22.0.0git.dylib  0x0000000115d613fc clang::ASTNodeImporter::VisitMemberExpr(clang::MemberExpr*) + 272
125 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
126 liblldb.22.0.0git.dylib  0x0000000115d66ce4 clang::ASTImporter::Import(clang::Expr*) + 28
127 liblldb.22.0.0git.dylib  0x0000000115d28160 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Expr>, llvm::Expected<clang::Expr const*>, llvm::Expected<clang::Expr*>>::type clang::ASTNodeImporter::import<clang::Expr>(clang::Expr*) + 32
128 liblldb.22.0.0git.dylib  0x0000000115d2faf0 clang::Expr* clang::ASTNodeImporter::importChecked<clang::Expr*>(llvm::Error&, clang::Expr* const&) + 72
129 liblldb.22.0.0git.dylib  0x0000000115d63474 clang::ASTNodeImporter::VisitCallExpr(clang::CallExpr*) + 116
130 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
131 liblldb.22.0.0git.dylib  0x0000000115d3e434 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Stmt>, llvm::Expected<clang::Stmt const*>, llvm::Expected<clang::Stmt*>>::type clang::ASTNodeImporter::import<clang::Stmt>(clang::Stmt*) + 32
132 liblldb.22.0.0git.dylib  0x0000000115d54774 clang::ASTNodeImporter::VisitCompoundStmt(clang::CompoundStmt*) + 216
133 liblldb.22.0.0git.dylib  0x0000000115d6aa98 clang::ASTImporter::Import(clang::Stmt*) + 268
134 liblldb.22.0.0git.dylib  0x0000000115d3e434 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Stmt>, llvm::Expected<clang::Stmt const*>, llvm::Expected<clang::Stmt*>>::type clang::ASTNodeImporter::import<clang::Stmt>(clang::Stmt*) + 32
135 liblldb.22.0.0git.dylib  0x0000000115d3e388 clang::ASTNodeImporter::ImportFunctionDeclBody(clang::FunctionDecl*, clang::FunctionDecl*) + 68
136 liblldb.22.0.0git.dylib  0x0000000115d3fabc clang::ASTNodeImporter::VisitFunctionDecl(clang::FunctionDecl*) + 4984
137 liblldb.22.0.0git.dylib  0x0000000115d66a90 clang::ASTImporter::ImportImpl(clang::Decl*) + 24
138 liblldb.22.0.0git.dylib  0x0000000114235e98 lldb_private::ClangASTImporter::ASTImporterDelegate::ImportImpl(clang::Decl*) + 588
139 liblldb.22.0.0git.dylib  0x0000000115d49afc clang::ASTImporter::Import(clang::Decl*) + 840
140 liblldb.22.0.0git.dylib  0x0000000115d29500 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Decl>, llvm::Expected<clang::Decl const*>, llvm::Expected<clang::Decl*>>::type clang::ASTNodeImporter::import<clang::Decl>(clang::Decl*) + 32
141 liblldb.22.0.0git.dylib  0x0000000115d3fcc4 clang::ASTNodeImporter::VisitFunctionDecl(clang::FunctionDecl*) + 5504
142 liblldb.22.0.0git.dylib  0x0000000115d66a90 clang::ASTImporter::ImportImpl(clang::Decl*) + 24
143 liblldb.22.0.0git.dylib  0x0000000114235e98 lldb_private::ClangASTImporter::ASTImporterDelegate::ImportImpl(clang::Decl*) + 588
144 liblldb.22.0.0git.dylib  0x0000000115d49afc clang::ASTImporter::Import(clang::Decl*) + 840
145 liblldb.22.0.0git.dylib  0x0000000114230274 lldb_private::ClangASTImporter::CopyDecl(clang::ASTContext*, clang::Decl*) + 100
146 liblldb.22.0.0git.dylib  0x000000011423e558 lldb_private::ClangASTSource::FindExternalLexicalDecls(clang::DeclContext const*, llvm::function_ref<bool (clang::Decl::Kind)>, llvm::SmallVectorImpl<clang::Decl*>&) + 1488
147 liblldb.22.0.0git.dylib  0x0000000115e5ccf8 clang::DeclContext::LoadLexicalDeclsFromExternalStorage() const + 248
148 liblldb.22.0.0git.dylib  0x0000000115e5de98 clang::DeclContext::buildLookup() + 172
149 liblldb.22.0.0git.dylib  0x0000000115e5dc6c clang::DeclContext::makeDeclVisibleInContextWithFlags(clang::NamedDecl*, bool, bool) + 600
150 liblldb.22.0.0git.dylib  0x0000000115d41178 clang::ASTNodeImporter::VisitFieldDecl(clang::FieldDecl*) + 1348
151 liblldb.22.0.0git.dylib  0x0000000115d66a90 clang::ASTImporter::ImportImpl(clang::Decl*) + 24
152 liblldb.22.0.0git.dylib  0x0000000114235e98 lldb_private::ClangASTImporter::ASTImporterDelegate::ImportImpl(clang::Decl*) + 588
153 liblldb.22.0.0git.dylib  0x0000000115d49afc clang::ASTImporter::Import(clang::Decl*) + 840
154 liblldb.22.0.0git.dylib  0x0000000115d29500 std::__1::conditional<std::is_base_of_v<clang::Type, clang::Decl>, llvm::Expected<clang::Decl const*>, llvm::Expected<clang::Decl*>>::type clang::ASTNodeImporter::import<clang::Decl>(clang::Decl*) + 32
155 liblldb.22.0.0git.dylib  0x0000000115d36f30 clang::ASTNodeImporter::ImportDeclContext(clang::DeclContext*, bool) + 252
156 liblldb.22.0.0git.dylib  0x0000000115d6ef98 clang::ASTImporter::ImportDefinition(clang::Decl*) + 540
157 liblldb.22.0.0git.dylib  0x000000011423436c lldb_private::ClangASTImporter::ASTImporterDelegate::ImportDefinitionTo(clang::Decl*, clang::Decl*) + 512
158 liblldb.22.0.0git.dylib  0x0000000114230ee8 (anonymous namespace)::CompleteTagDeclsScope::~CompleteTagDeclsScope() + 1028
159 liblldb.22.0.0git.dylib  0x00000001142308f0 lldb_private::ClangASTImporter::DeportType(lldb_private::TypeSystemClang&, lldb_private::CompilerType const&) + 532
160 liblldb.22.0.0git.dylib  0x0000000114242744 lldb_private::ClangExpressionDeclMap::DeportType(lldb_private::TypeSystemClang&, lldb_private::TypeSystemClang&, lldb_private::TaggedASTType<0u>) + 336
161 liblldb.22.0.0git.dylib  0x0000000114242c60 lldb_private::ClangExpressionDeclMap::AddPersistentVariable(clang::NamedDecl const*, lldb_private::ConstString, lldb_private::TaggedASTType<0u>, bool, bool) + 1212
162 liblldb.22.0.0git.dylib  0x0000000114270bd0 IRForTarget::CreateResultVariable(llvm::Function&) + 2784
163 liblldb.22.0.0git.dylib  0x0000000114275478 IRForTarget::runOnModule(llvm::Module&) + 552
164 liblldb.22.0.0git.dylib  0x0000000114257780 lldb_private::ClangExpressionParser::DoPrepareForExecution(unsigned long long&, unsigned long long&, std::__1::shared_ptr<lldb_private::IRExecutionUnit>&, lldb_private::ExecutionContext&, bool&, lldb_private::ExecutionPolicy) + 1568
165 liblldb.22.0.0git.dylib  0x0000000113ed6de4 lldb_private::ExpressionParser::PrepareForExecution(unsigned long long&, unsigned long long&, std::__1::shared_ptr<lldb_private::IRExecutionUnit>&, lldb_private::ExecutionContext&, bool&, lldb_private::ExecutionPolicy) + 48
166 liblldb.22.0.0git.dylib  0x000000011426a3cc lldb_private::ClangUserExpression::TryParse(lldb_private::DiagnosticManager&, lldb_private::ExecutionContext&, lldb_private::ExecutionPolicy, bool, bool) + 472
167 liblldb.22.0.0git.dylib  0x000000011426a7dc lldb_private::ClangUserExpression::Parse(lldb_private::DiagnosticManager&, lldb_private::ExecutionContext&, lldb_private::ExecutionPolicy, bool, bool) + 148
168 liblldb.22.0.0git.dylib  0x0000000113ef348c lldb_private::UserExpression::Evaluate(lldb_private::ExecutionContext&, lldb_private::EvaluateExpressionOptions const&, llvm::StringRef, llvm::StringRef, std::__1::shared_ptr<lldb_private::ValueObject>&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>*, lldb_private::ValueObject*) + 3544
169 liblldb.22.0.0git.dylib  0x0000000113ff9cac lldb_private::Target::EvaluateExpression(llvm::StringRef, lldb_private::ExecutionContextScope*, std::__1::shared_ptr<lldb_private::ValueObject>&, lldb_private::EvaluateExpressionOptions const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>*, lldb_private::ValueObject*) + 1184
170 liblldb.22.0.0git.dylib  0x0000000113367280 lldb::SBFrame::EvaluateExpression(char const*, lldb::SBExpressionOptions const&) + 832
171 liblldb.22.0.0git.dylib  0x0000000113456f84 _wrap_SBFrame_EvaluateExpression(_object*, _object*) + 1548
172 Python                   0x000000010531107c cfunction_call + 116
173 Python                   0x00000001052b4528 _PyObject_Call + 128
174 Python                   0x00000001053e0a04 _PyEval_EvalFrameDefault + 22176
175 Python                   0x00000001052b6d64 method_vectorcall + 188
176 Python                   0x00000001053e0a04 _PyEval_EvalFrameDefault + 22176
177 Python                   0x00000001052b3654 _PyObject_VectorcallDictTstate + 92
178 Python                   0x00000001052b4c24 _PyObject_Call_Prepend + 136
179 Python                   0x0000000105345690 slot_tp_call + 128
180 Python                   0x00000001052b3848 _PyObject_MakeTpCall + 120
181 Python                   0x00000001053dd54c _PyEval_EvalFrameDefault + 8680
182 Python                   0x00000001052b6d64 method_vectorcall + 188
183 Python                   0x00000001053e0a04 _PyEval_EvalFrameDefault + 22176
184 Python                   0x00000001052b3654 _PyObject_VectorcallDictTstate + 92
185 Python                   0x00000001052b4c24 _PyObject_Call_Prepend + 136
186 Python                   0x0000000105345690 slot_tp_call + 128
187 Python                   0x00000001052b3848 _PyObject_MakeTpCall + 120
188 Python                   0x00000001053dd54c _PyEval_EvalFrameDefault + 8680
189 Python                   0x00000001052b6d64 method_vectorcall + 188
190 Python                   0x00000001053e0a04 _PyEval_EvalFrameDefault + 22176
191 Python                   0x00000001052b3654 _PyObject_VectorcallDictTstate + 92
192 Python                   0x00000001052b4c24 _PyObject_Call_Prepend + 136
193 Python                   0x0000000105345690 slot_tp_call + 128
194 Python                   0x00000001052b3848 _PyObject_MakeTpCall + 120
195 Python                   0x00000001053dce30 _PyEval_EvalFrameDefault + 6860
196 Python                   0x00000001053db0e8 PyEval_EvalCode + 200
197 Python                   0x000000010544b94c run_eval_code_obj + 104
198 Python                   0x000000010544b394 run_mod + 168
199 Python                   0x0000000105449a74 pyrun_file + 164
200 Python                   0x0000000105448db0 _PyRun_SimpleFileObject + 256
201 Python                   0x00000001054489e8 _PyRun_AnyFileObject + 80
202 Python                   0x0000000105470430 pymain_run_file_obj + 164
203 Python                   0x00000001054700dc pymain_run_file + 76
204 Python                   0x000000010546f34c Py_RunMain + 968
205 Python                   0x000000010546f948 pymain_main + 304
206 Python                   0x000000010546f9e8 Py_BytesMain + 40
207 dyld                     0x0000000186e15c84 start + 7040

[llvmbot]

@llvm/issue-subscribers-clang-modules

Author: Michael Buch (Michael137)

This is a follow-up to https://github.com//pull/149390

#147389 introduced code in the fstream header that was using a function local lambda. This caused following import-std-module tests to fail:

16:22:51  ********************
16:22:51  Unresolved Tests (2):
16:22:51    lldb-api :: commands/expression/import-std-module/list-dbg-info-content/TestDbgInfoContentListFromStdModule.py
16:22:51    lldb-api :: commands/expression/import-std-module/list/TestListFromStdModule.py

with following assertion:

Assertion failed: (capture_size() == Class->capture_size() && "Wrong number of captures"), function LambdaExpr, file ExprCXX.cpp, line 1277.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.

For now this was worked around by moving the lambda into a helper method. But we should really fix the underlying issue so libc++ is free to use whatever idioms they want to.