[libcxx-commits] [libcxx] [libc++] Add internal checks for some basic_streambuf invariants (PR #144602)

[Michael Buch via libcxx-commits]

Michael137 wrote:

This unfortunately broke the LLDB macOS CI:
```
08:14:18  Unresolved Tests (16):
08:14:18    lldb-api :: commands/expression/import-std-module/array/TestArrayFromStdModule.py
08:14:18    lldb-api :: commands/expression/import-std-module/deque-basic/TestDequeFromStdModule.py
08:14:18    lldb-api :: commands/expression/import-std-module/deque-dbg-info-content/TestDbgInfoContentDequeFromStdModule.py
08:14:18    lldb-api :: commands/expression/import-std-module/forward_list-dbg-info-content/TestDbgInfoContentForwardListFromStdModule.py
08:14:18    lldb-api :: commands/expression/import-std-module/forward_list/TestForwardListFromStdModule.py
08:14:18    lldb-api :: commands/expression/import-std-module/iterator/TestIteratorFromStdModule.py
08:14:18    lldb-api :: commands/expression/import-std-module/list-dbg-info-content/TestDbgInfoContentListFromStdModule.py
08:14:18    lldb-api :: commands/expression/import-std-module/list/TestListFromStdModule.py
08:14:18    lldb-api :: commands/expression/import-std-module/non-module-type-separation/TestNonModuleTypeSeparation.py
08:14:18    lldb-api :: commands/expression/import-std-module/shared_ptr-dbg-info-content/TestSharedPtrDbgInfoContentFromStdModule.py
08:14:18    lldb-api :: commands/expression/import-std-module/shared_ptr/TestSharedPtrFromStdModule.py
08:14:18    lldb-api :: commands/expression/import-std-module/unique_ptr-dbg-info-content/TestUniquePtrDbgInfoContent.py
08:14:18    lldb-api :: commands/expression/import-std-module/unique_ptr/TestUniquePtrFromStdModule.py
08:14:18    lldb-api :: commands/expression/import-std-module/vector-of-vectors/TestVectorOfVectorsFromStdModule.py
08:14:18    lldb-api :: commands/expression/import-std-module/weak_ptr-dbg-info-content/TestDbgInfoContentWeakPtrFromStdModule.py
08:14:18    lldb-api :: commands/expression/import-std-module/weak_ptr/TestWeakPtrFromStdModule.py
08:14:18 
```

Same issue as https://github.com/llvm/llvm-project/issues/149477

We worked around it last time by not using a lambda in https://github.com/llvm/llvm-project/pull/149390. But that doesn't seem like a reasonable ask in this case?

I'll try to repro this locally and see if there's an LLDB fix for this

https://github.com/llvm/llvm-project/pull/144602