1. Type some text which is an invalid title in MW, e.g. "|InvalidTitle"
2. Select it and hit link
3. Notice that there are no suggestions, and no initial link is applied
4. Type in a valid page name, e.g. "Main page" and press Done
5. Notice some of your text has been deleted (by and undo operation) before the link was applied

The bug is actually in core AnnotationInspector#getTeardownProcess. We call a surface undo() to remove the initial annotation, but in the case of an invalid title there is no initial annotation.

Version: unspecified
Severity: normal