Per https://bugzilla.wikimedia.org/show_bug.cgi?id=15842#c8 image pages were being moved while the associated files were not, in the case of missing old revisions. Vasilvv has fixed this to abort on error, but file moves should gracefully skip missing old revisions when moving, rather than simply fail.
If you delete an image or old version of an image where the associated file is missing, you cannot undelete the image, except by manually de-selecting all broken old versions from the file history.
Deleting old missing revisions results in a successful removal of the row with warning:
Error deleting file: Could not rename file "public/archive/a/a3/20080704135833!AnyNonsense.png" to "deleted/7/g/q/7gqsst5kfvsixebqpajrsf31hczook9.png".
Attempting to undelete a single missing revision results in general errors:
Undelete failed; someone else may have undeleted the page first.
Undeletion will not be performed if it will result in the top page or file revision being partially deleted. In such cases, you must uncheck or unhide the newest deleted revision.
Error undeleting file: Could not find file "deleted/7/g/q/7gqsst5kfvsixebqpajrsf31hczook9.png".
Attempting to undelete all revisions where one or more versions are missing results in a success message with warnings, and a corrupted page created with no files associated at all (similar to earlier file moving problems):
Errors were encountered while undeleting the file: * Could not find file "deleted/b/x/i/bxik35jpaakpwc8a6i09gq3heevjl0e.png". * Could not find file "deleted/7/g/q/7gqsst5kfvsixebqpajrsf31hczook9.png".