fseditor.js crash: line 330: TypeError: line[l + 1] is undefined

When backspacing through a line of text:

Subj: Microphones
To  : MATTHEW MUNSON
From: Digital Man
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 > If I am making a podcast would an ipad be ok tool to use or just stay on my
 > . pc?

Either would work, but make sure you're using a good microphone. A Blue Yeti or
the AT2020USB+
https://www.amazon.com/Audio-Technica-AT2020USB-Cardioid-Condenser-Mi!JavaScript
 fseditor.js line 330: TypeError: line[l + 1] is undefined

Aborted.