Add validation for zero-dimension images in save() #9390
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Saving an image with zero width or height now raises a clear ValueError instead of cryptic internal errors like "max() arg is empty" (GIF) or "tile cannot extend outside image" (PNG). Fixes python-pillow#9389
aayushadhikari7
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Summary
When saving an image with zero width or height, Pillow currently crashes with confusing internal errors:
ValueError: max() iterable argument is empty(in_get_optimize)SystemError: tile cannot extend outside imageThis PR adds early validation in
Image.save()to raise a clear error message:Changes
save()method(0, 1),(1, 0), and(0, 0)dimensionsTest Plan
Fixes #9389