Do not support using test-image-results to upload images after test failures#7739
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radarhere merged 1 commit intopython-pillow:mainfrom Jan 24, 2024
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Dec 23, 2025
…sing sequential generation Root cause: Pillow's C extensions are not thread-safe without the GIL. Python 3.14t (free-threading build) disables the GIL, causing segfaults when ThreadPoolExecutor is used for parallel image generation. Changes: - Remove ThreadPoolExecutor parallel generation (unsafe in no-GIL mode) - Add _is_free_threading() check to detect free-threading Python - Use sequential generation for all Python builds (consistent, safe) - Add progress logging for large sites (>100 pages) - Performance: ~30ms/card, acceptable for 1000+ page sites See: python-pillow/Pillow#7739
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Do not use test-image-results to upload images after test failures.
Suggested in #7733 (comment)