Wikimedia Bugzilla is closed!

1. Go to
https://test.wikipedia.org/wiki/Special:Preferences#mw-prefsection-gadgets
and disable all gadgets except one which is loaded by ResourceLoader (e.g. "ShortDiff"), then save your changes
2. Clear you browser cache and local storage
3. Go to
https://test.wikipedia.org/wiki/Special:BlankPage
and take note of the list of gadget modules in the store:

$.grep( Object.keys( mw.loader.store.items ), function( m ){
    return m.indexOf( 'ext.gadget' ) !== -1; }
).join( '\n' )

In my case, this returned:
ext.gadget.ShortDiff@1347062400

3) Go back to
https://test.wikipedia.org/wiki/Special:Preferences#mw-prefsection-gadgets
and disable that gadget, and save your changes

4) Check the list of modules in the storage again.

Expected result:
* The module of the gadget should be removed from local storage
Actual result:
* The module is still there, taking space