- Replace deprecated Thread.isAlive() with is_alive() (Python 3.12)
- Fix invalid escape sequences in regex strings (SyntaxWarning → SyntaxError)
- Replace removed unittest aliases: assertEquals→assertEqual,
assertNotEquals→assertNotEqual, assert_→assertTrue,
assertRaisesRegexp→assertRaisesRegex (Python 3.12)
- Replace portage's removed clear_caches() with flush_cache()
- Fix locks.py: reset TLS state on exception in _file_lock_create
to prevent stale shared-lock state poisoning subsequent acquisitions
- Skip os.chown() when gid is None or caller lacks permission
- Fix FastRSS attribute ordering for consistent minidom re-parse behavior
- Update test expected XML to match Python 3.8+ minidom attribute order
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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