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pythongh-154523 turned the buffer member descriptor into a getter that raises ValueError when the buffer is NULL, and the backport shipped in 3.14.9 and 3.15.1. That made hasattr(stream, "buffer") raise after detach(). Restore the old member descriptor result (None) while keeping the critical section.
cmaloney
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needs backport to 3.14
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cc: @kumaraditya303 , @vstinner : This attribute changed from returning |
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gh-154523 turned the buffer member descriptor into a getter that raises ValueError when the buffer is NULL, and the backport shipped in 3.14.9 and 3.15.1. That changed the behavior of
hasattr(stream, "buffer")to raise after.detach(). Restore the old member descriptor result (None) while keeping the critical section for free-threaded safety.hasattr(stream, "buffer")fails with ValueError if buffer is detached #160427