4775b7feb1
This changes the decoder's behaviour when there is stray/extra data found after an image is decompressed (e.g., data sub-blocks after an LZW End of Information Code). Instead of raising an error, we silently skip over such data until we find the end of the image data marked by a Block Terminator. We skip at most one byte as sample problem GIFs exhibit this property. GIFs should not have and do not need such stray data (though the specification is arguably ambiguous). However GIFs with such properties have been seen in the wild. Fixes #16146 Change-Id: Ie7e69052bab5256b4834992304e6ca58e93c1879 Reviewed-on: https://go-review.googlesource.com/37258 Reviewed-by: Nigel Tao <nigeltao@golang.org> Run-TryBot: Nigel Tao <nigeltao@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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