Steps to Reproduce:
- Don't have sysop rights on English Wikipedia.
- Set your default editor to VisualEditor.
- Try to move a page to a title that you're not allowed to (e.g. Radio Man -> Radioman on English Wikipedia).
Actual results:
VisualEditor loads on Special:MovePage with the contents of the article. (See screenshot.)
Expected results:
You just get an error message and no VisualEditor stuff.