gif

Five GIF files with extreme shapes: gif_1x1 (43 bytes), gif_10000x1, gif_1x10000, gif_65535x1 and gif_1x65535. GIF stores its width and height in 16 bits, so 65535 is the largest side it can have, and the files here reach that limit with only a single row or column of pixels. They are all under 500 bytes. A one-pixel file is a good check for division by zero or aspect ratio errors, and the very long ones test the limits of resizers and previews. Check that your code rejects them, or scales them down, without crashing.