[PATCH] D97849: [AST][PCH][ASTImporter] Fix UB caused by uninited SwitchStmt member

Wed Mar 3 06:53:56 PST 2021

steakhal added a comment.

In D97849#2600201 <https://reviews.llvm.org/D97849#2600201>, @aaron.ballman wrote:

> This looks reasonable to me (good catch!), but is there a way for us to add a regression test for it?

I'm not sure if it's possible to write a test for deterministically demonstrating the bug - which is a non-deterministic crash.
So, even if we would have a test case, that would not catch the regression deterministically.
We could include the minimal reproducer for CTU analysis - the way we observed and tracked down this crash.

AFAIK, it did not reproduce with memory sanitizers.

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