Wikimedia Bugzilla is closed!

- Press "Transclusion" at the toolbar
- At the transclusion dialog, hover on the "+" symbol at the bottom left
- Press the hidden "Add content" ("[]") button.
- Type anything at the Content text box (I've tried plain text, [[wikilink]], and {{cn}})
- Apply changes

Nothing shows at the edited page, nor at "Review your changes". But from now on, the "Transclusion" button does nothing, as well as any other button with a dialog (link, media, insert reference...)