Subject: bug#28280: Maximally unhelpful diagnostic message.

From: Glenn Morris <[email-masked]>
Date: Tue, 29 Aug 2017 15:20:23 -0400

Alan Mackenzie wrote:

>     Assertion failed: (eq 10 (char-before))

A few seconds grep suggests this is due to the code in newline, added ~
3 years ago in 62ee8b1 ("Add assertions to try and help catch bug#18913").
The complete lack of progress in that report since then suggests it may
be time to remove/downgrade those assertions.