Error creating thumbnail: convert: Expected 8 bytes; found 0 bytes `/tmp/localcopy_7075a0c15d47-1.png' @ warning/png.c/MagickPNGWarningHandler/1335.
convert: Read Exception `/tmp/localcopy_7075a0c15d47-1.png' @ error/png.c/MagickPNGErrorHandler/1309.
convert: corrupt image `/tmp/localcopy_7075a0c15d47-1.png' @ error/png.c/ReadPNGImage/3294.
convert: missing an image filename `/tmp/transform_5eddba096f3d-1.png' @ error/convert.c/ConvertImageCommand/3011.
And locally with ImageMagick 6.7.5-6 2012-08-11 Q16:
identify: Expected 8 bytes; found 0 bytes `/tmp/magick-32o5zvzE' @ warning/png.c/MagickPNGWarningHandler/1754.
identify: Read Exception `/tmp/magick-32o5zvzE' @ error/png.c/MagickPNGErrorHandler/1728.
identify: corrupt image `/tmp/magick-32o5zvzE' @ error/png.c/ReadPNGImage/3701.
So the image looks/is corrupt, but unlike others in https://toolserver.org/~dispenser/temp/logs/cache_thumbs_errors.log , which I've reported as corrupt for fix or deletion, renders fine with Firefox for me.
Version: unspecified
Severity: minor
URL: https://upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Bihar_district_map.PNG/120px-Bihar_district_map.PNG