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Do not clear GIF tile when checking number of frames #6455

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merged 1 commit into from
Jul 25, 2022

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Resolves #6454

When checking the number of frames, GifImagePlugin calls _seek() with an update_image value of False. The idea is that the image does not need to be loaded, just the data read. This was added in #6077 for performance.

It makes sense then, that the tile value should also not be updated. This PR makes that change.

Without this change, the issue found a situation where the image had not been loaded, and after checking whether or not the image was animated, there was no longer a tile to load image data from.

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Pillow 9.2: 'NoneType' object has no attribute 'copy'
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