This link https://de.wikipedia.org/w/index.php?title=Spezial:Wiederherstellen&target=Innsbrucker+Cartellverband×tamp=20050217205903
gives a "Exception encountered, of type "BadMethodCallException"", no hash or stacktrace. It also breaks undeletion of this version.
The version is revision deleted, but other deleted versions of that page was visible (but now undeleted).
It seems that the mediawiki error handling is not run for such an error (which looks bad too, but maybe another error/issue).
Would be nice to look up errors in the logs (for my user name) around now to found a possible issue. Thanks