Re: Redisplay loop with an unicode overlay-arrow-string

[Eli Zaretskii]

> From: Yuri D'Elia <wavexx@thregr.org>
> Date: Fri, 22 Apr 2022 11:49:37 +0200
> Cc: Eli Zaretskii <eliz@gnu.org>, emacs-devel@gnu.org
> 
> I swear I tried the unicode arrow somehow. How I did it? No idea.. it
> hangs in any way I set it now ;)).

It only hangs (well, hanged) if the characters involved use more than
one byte in its internal representation, and then only if the byte
index of some character is greater than the index of the last
characters in the string.  The hang is (was) caused by
get-text-property, called by the code, signaling an error due to
invalid character index, which would then trigger another redisplay
cycle, which will then cause another error, etc. etc.