"Invalid index" with multi-cursor module

[dmonad]

When using the "multi-cursor" module, you may get an Error "Invalid index" in Editor.prototype.getBounds. You can recreate this error in the example on the homepage: First, create a cursor in the top editor. Then, delete all the content in the bottom editor (with forward-delete, hit it multiple times).

This is a major bug for me, because the delete operation, that causes this Error, is not processed anymore.