swift

5cba70d1 - [Async Refactoring] Fix crash on recursive AST walk

[Async Refactoring] Fix crash on recursive AST walk The async refactoring may perform recursive AST walks in cases such as transforming the body of a hoisted closure. Make sure this can be handled by the logic tracking the ASTWalker in the SourceEntityWalker, such that we don't crash when later converting the call to a completion callback. rdar://78693050