Subject: Re: bug#30112: 27.0.50; bibtex-mode timer and redisplay errors

From: Eli Zaretskii <[email-masked]>
Date: Sun, 14 Jan 2018 18:05:14 +0200

> From: "Basil L. Contovounesios" <[email-masked]>
> Date: Sun, 14 Jan 2018 15:27:18 +0000
> 
>   Error during redisplay: (jit-lock-function 1) signaled
>   (args-out-of-range #<buffer *scratch*> 0 1)
> [...]
> 
> Note that step (6) is only needed to trigger the redisplay error

It's not a redisplay error, it's a JIT Font lock error.  Redisplay
calls JIT lock as part of redisplaying the window, so it catches the
error and reports it.