Regular crash in modifying regex

[Kornel Benko]

Am Thu, 14 Jan 2021 00:58:40 +0100
schrieb Kornel Benko <kornel at lyx.org>:

> How to reproduce
> 
> 1.) Open lyx file e.g. Additional.lyx
> 2.) select AdvFind
> 3.) select regexp-mode
> 4.) insert any text not in this file
> 5.) select search for section
> 6.) change to not ignore format
> 7.) start search
> 8.) cancel the search (with escape)
> 9.) clean the regex content and try to insert anything ==> crash
> 
> BTW, lyx2.3 does not crash.
> 
> 	Kornel

Git bisect leads me to 
a7018252b75316b7855f04c51be2342dc269f96c is the first bad commit
commit a7018252b75316b7855f04c51be2342dc269f96c
Author: Yuriy Skalko <yuriy.skalko at gmail.com>
Date:   Wed Oct 21 11:35:40 2020 +0300

    Constify

:040000 040000 81a480dee456a7439608de9bb05c6291ca89a128
4fde5659d244053cb4d6c235120e5d96d216999f M	src

Hm, I hardly believe it.

	Kornel
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