Crash when closing pane with FakeVim

When closing a split via ctrl+w, ctrl+c, Qt Creator will crash. This only happens when there are multiple panes of the same file currently open.

repro steps:

1. open any file.
2. Open another split of the same file e.g. ctrl+w,ctrl+v
3. close one of them via ctrl+w,ctrl+c

Expected Result: The currently focused pane closes

Actual Result: Crash / Qt Creator closes.

Workaround: Passing out of vim mode and then using the traditional qt creator shortcut i.e. [",", Ctrl+E, 0]. Or just closing it with your mouse