Is there a bug in numpy 2.0.0?

np.ones_like on zero-sized dtype returns wrong dtype np.ones_like(arr) returned float64 when arr had dtype with itemsize 0 (custom structured dtypes). Fixed in 2.0.1. Fixed in numpy 2.0.1.

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numpy known bugs

pypi

1 known bug in numpy, with affected versions, fixes and workarounds. Sourced from upstream issue trackers.

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bugs

Known bugs

Severity	Affected	Fixed in	Title	Status	Source
low	2.0.0	2.0.1	np.ones_like on zero-sized dtype returns wrong dtype np.ones_like(arr) returned float64 when arr had dtype with itemsize 0 (custom structured dtypes). Fixed in 2.0.1.	closed	github:#26909

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