[compiler-rt] [compiler-rt] Fix frame numbering for unparsable frames. (PR #148278)

[Thurston Dang via llvm-commits]

thurstond wrote:

> I looked for existing automated tests but didn't see any. Happy to add a test if there is a framework for it.

Maybe something similar to `compiler-rt/test/asan/TestCases/Posix/asan_symbolize_script/plugin_wrong_frame_number_bug.cpp`?


https://github.com/llvm/llvm-project/pull/148278