[3.15] Drop the Cython<3.3 build pin on 3.15 #21034

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#21027

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[3.15] Drop the Cython<3.3 build pin on 3.15#21034

#21027

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python:3.15Tracks Python 3.15 enablement workTracks Python 3.15 enablement work

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vlad-scherbich

opened on Oct 15, 2026

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Tracked under parent: #17809

#19861 pinned cython<3.3 for 3.15 builds because Cython 3.3.0 cp315 wheels crashed on the 3.15.0b1 wheel-builder images. The images are now on rc1, so the pin can go.

PR: #21027

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1. vlad-scherbich

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   python:3.15Tracks Python 3.15 enablement workTracks Python 3.15 enablement work

   on Oct 15, 2026
2. vlad-scherbich

   added a parent issue on Oct 15, 2026

   • [Tracker] Python 3.15 integration parity #17809

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