gh-136186: Fix flaky tests in test_external_inspection #143110
Merged
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Several tests calling unwinder.get_stack_trace() were flaky because they
used retry loops without exception handling. Transient failures like
"Failed to parse initial frame in chain" that occur when sampling at an
inopportune moment would immediately fail the test instead of being
retried.
The fix adds a _get_stack_trace_with_retry helper function and updates
seven locations to use busy_retry with contextlib.suppress for OSError
and RuntimeError, matching the existing pattern in
_get_frames_with_retry. This allows transient failures to be silently
retried while still timing out if the expected condition is never met.