[all-commits] [llvm/llvm-project] ce4740: [Clang][Sema] Fix crash when MS dependent base cla...

[Krystian Stasiowski via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ce4740d3e31e936aa93c115f63bf223c74c9dc20
      https://github.com/llvm/llvm-project/commit/ce4740d3e31e936aa93c115f63bf223c74c9dc20
  Author: Krystian Stasiowski <sdkrystian at gmail.com>
  Date:   2024-02-26 (Mon, 26 Feb 2024)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/lib/Sema/SemaExpr.cpp
    M clang/test/SemaTemplate/ms-lookup-template-base-classes.cpp

  Log Message:
  -----------
  [Clang][Sema] Fix crash when MS dependent base class lookup occurs in an incomplete context (#83024)

When compiling the following with `-fms-compatibility`:
```
template<typename T> struct C;

// Test lookup with incomplete lookup context
template<typename T>
auto C<T>::f() -> decltype(x) { }
```
An assert fails because `CXXRecordDecl::hasAnyDependentBases` is called
on an incomplete class. This patch ensures we don't perform unqualified
lookup into dependent base classes when the lookup context is
incomplete.



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