[3.7] bpo-29097: Forego fold detection on windows for low timestamp values (GH-2385) #8466
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…ythonGH-2385) On Windows, passing a negative value to local results in an OSError because localtime_s on Windows does not support negative timestamps. Unfortunately this means that fold detection for timestamps between 0 and max_fold_seconds will result in this OSError since we subtract max_fold_seconds from the timestamp to detect a fold. However, since we know there haven't been any folds in the interval [0, max_fold_seconds) in any timezone, we can hackily just forego fold detection for this time range on Windows. (cherry picked from commit 96d1e69) Co-authored-by: Ammar Askar <ammar_askar@hotmail.com>
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@ammaraskar and @abalkin: Backport status check is done, and it's a failure ❌ . |
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On Windows, passing a negative value to local results in an OSError because localtime_s on Windows does not support negative timestamps. Unfortunately this means that fold detection for timestamps between 0 and max_fold_seconds will result in this OSError since we subtract max_fold_seconds from the timestamp to detect a fold. However, since we know there haven't been any folds in the interval [0, max_fold_seconds) in any timezone, we can hackily just forego fold detection for this time range on Windows.
(cherry picked from commit 96d1e69)
Co-authored-by: Ammar Askar ammar_askar@hotmail.com
https://bugs.python.org/issue29097