https://bugzilla.wikimedia.org/show_bug.cgi?id=72115

--- Comment #7 from Tisza GergÅ‘ <[email protected]> ---
The two images mentioned in the FF console in the screenshots:
https://commons.wikimedia.org/wiki/File:Ko_BuWe.jpg
https://commons.wikimedia.org/wiki/File:Zwaardstootplaat-Rijksmuseum_AK-MAK-1056.jpeg

The first file was loaded directly from Commons, the other from beta Commons.

I don't see why this would be a MediaViewer issue. (Was its appearence somehow
correlated with using MediaViewer? MV can cause some oddities on Beta because
it sometimes tries to preload thumbnails before they exist, and the resulting
404 gets cached - but this error is not related to that in any way I can see.)
Some ideas:

- some sort of local issue? Happens deterministically, but no one else could
reproduce...
- could be an actual image loading error: Firefox seems to emit this error if
it fetches the content for an image file and it turns out not to be a valid
image. Maybe the file gets truncated somehow (there were a lot of HTTP errors
on beta after the HHVM switch, see e.g. bug 72162 - based on Rummana's
screenshot, the file is not necessarily served by beta though, so such an error
seems unlikely)
- https://bugzilla.mozilla.org/show_bug.cgi?id=941823 mentions FF errors with
large files - the ones mentioned in the bug are in the 100MP range though,
while the two files in the screenshots are 10MP
- there are claims that FF throws this error if you change the src of an image
before it is fully loaded (e.g.
http://stackoverflow.com/questions/11928878/detect-image-corrupt-or-truncated-in-firefox
)

All in all, I would close this as worksforme if no one can reproduce and there
are no reports of this happening in the wild.

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