When pasting a large block into a small file while in split mode it can cause an assert in QPlainTextEdit

When pasting a large block into a small file it can cause an assert in QPlainTextEdit. This happens when loading the attached file and having a blank one. First of all ensure that you have a split view, with the attached file shown and the blank file in the other one. Click at the top of the file with the content and do:

SHIFT+v
SHIFT+g
y

So that everything is selected and copied. Then click in the blank file view and press p to paste and then it will assert in QPlainTextEdit with !line.isValid().