Wikimedia Bugzilla is closed!

This came up while working on the new Media dialog in VisualEditor. When changing a block image type, for instance from 'thumb' to 'frameless', the new type is added onto the wikitext instead of replacing the old type tag.

Original wikitext:
[[File:image.png|thumb|right|caption goes here|466x466px]]

After changing the type of the image to frameless (including all style changes and type attribute) the resulting post-save wikitext is this:

[[File:image.png|thumb|right|caption goes here|466x466px|frameless]]