[New-bugs-announce] [issue37289] regression in cython due to peephole optomization

[Thomas Caswell]

New submission from Thomas Caswell <tcaswell at gmail.com>:

The fix for 
https://bugs.python.org/issue37213 in 3498c642f4e83f3d8e2214654c0fa8e0d51cebe5 (https://github.com/python/cpython/pull/13969) seems to break building numpy (master) with cython (master) due to a pickle failure.

The traceback (which is mostly in the cython source) is in an attachment.

I bisected it back to this commit and tested that reverting this commit fixes the numpy build.

----------
files: np_fail.txt
messages: 345655
nosy: pablogsal, scoder, serhiy.storchaka, tcaswell, vstinner
priority: normal
severity: normal
status: open
title: regression in cython due to peephole optomization
type: behavior
versions: Python 3.8, Python 3.9
Added file: https://bugs.python.org/file48421/np_fail.txt

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