Tried to import a JS file from Commonswiki to testwiki using [[Special:Import]]. Testwiki runs 1.21wmf8 (2227cd7).
Page was imported but no indication in the revision history (usually there is a "User imported \d+ revisions from <wiki>").
Also the following error message was shown:
Import failed: Can't save non-default content model with $wgContentHandlerUseDB disabled: model is wikitext , default for MediaWiki:Gadget-libUtil.js is javascript
Version: 1.21.x
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=45750