Python variables becomes invalid when batch creating attribute layers #99131
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Reference: blender/blender#99131
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System Information
Operating system: Gentoo Linux
Graphics card: AMD WX 9100
Blender Version
Broken: 3.2 and master
Worked: I'm guessing this has been broken since attribute layers were introduced
Short description of error
When creating new attributes layers via python, the returned attribute object will stop work after multiple layers are added.
It seems like the attribute layers might be reallocated and moved while the python pointers doesn't get updated when this happens.
Exact steps for others to reproduce the error
In a python script, create multiple attributes for a mesh in a row and save the return value.
Notice that if you add too many the previously returned variables will stop working.
Steps to reproduce with the attached file:
new
calls the returned variables are valid.attribute_error.blend
Added subscriber: @ZedDB
Changed status from 'Needs Triage' to: 'Confirmed'
Added subscriber: @scurest
See https://developer.blender.org/T43332#294071. You can first create them all, then fetch them by name.
Added subscriber: @OmarEmaraDev
I hit an assert
BLI_assert_msg(0, "Custom data layer not found in geometry");
in debug mode in the provided file.Changed status from 'Confirmed' to: 'Needs Developer To Reproduce'
Thanks @scurest, I will mark this as in need of information from developers for the time being.