[clang] [WinEH] Fix crash, object unwinding in the except block (PR #172287)

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GkvJwa wrote:

> Hey, just wanted to add references to the previous discussions about the issue: Here is an implementation of the sema check: https://github.com/llvm/llvm-project/pull/151836/files Here is another bug report about the issue: #82917

Got it. It seems it doesn't work outside of the block either.

https://github.com/llvm/llvm-project/pull/172287