https://bugzilla.wikimedia.org/show_bug.cgi?id=31680

       Web browser: ---
             Bug #: 31680
           Summary: [Regression] Thumbnail cache should be invalidated on
                    re-upload
           Product: MediaWiki
           Version: 1.18
          Platform: All
               URL: https://commons.wikimedia.org/wiki/File:Station-Leeuwa
                    rden-WLM.jpg
        OS/Version: All
            Status: NEW
          Keywords: code-update-regression
          Severity: normal
          Priority: Unprioritized
         Component: Images and files
        AssignedTo: [email protected]
        ReportedBy: [email protected]
                CC: [email protected], [email protected]
            Blocks: 28425, 29876
    Classification: Unclassified


I'm not entirely sure if it's a regression. Marking as such for now.

https://commons.wikimedia.org/wiki/File:Station-Leeuwarden-WLM.jpg has had a
new upload, but the 800px thumbnail cache is not being
invalided/purged/cleared.

A recent reupload took place removing the watermark, but the 800px thumbnail
still has it. Any other random size that I come up with that wasn't cached
before does show the correct latest version.

800px:
https://upload.wikimedia.org/wikipedia/commons/thumb/0/0e/Station-Leeuwarden-WLM.jpg/800px-Station-Leeuwarden-WLM.jpg

651px:
https://upload.wikimedia.org/wikipedia/commons/thumb/0/0e/Station-Leeuwarden-WLM.jpg/651px-Station-Leeuwarden-WLM.jpg

action=purge or null-edit on the description page didn't fix it. Neither did
clearing complete browser cache.

Even if action=purge did work, imho cache should automatically be marked
invalid/cleared/whatever when a file has been (re)uploaded, just like is done
for wikitext cache when an article is edited.

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