Alastair Houghton a73e98c660 [Linux][Backtracing] Fix unwinder so it stops properly. ...

On Linux specifically, it was possible for it to return `nil` to signal
the end of the unwind, then subsequently return non-`nil` again.  That
violates the expectations of the code layered above it, and can cause
an "Index out of range" error to occur.

rdar://112534548

2023-07-20 15:32:57 +01:00

6.5 KiB

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