Emacs hangs, error in syntax-highlighting of curly braces

[pmarinov]

Actual behavior

Emacs hangs, only $ kill <pid> can restore it

Steps to reproduce the problem

Paste this in a .adoc file with syntax-highlighting activated

* Create *a pointer file* here, it should look like this:
+
....
$ cat \{2df366ca-28d2-11e8-9c70-b7b0d99bd061\}
/home/peterm/work/qf../firefox-.../
....

The presence of the escape slashes in front of the curly braces causes
it to hang, if I paste this fragment without the escape slashes it
works.

Environment & Version information

Adoc-Mode version information

M-x list-pakagages shows:

adoc-mode 20240218.1035  installed

BTW, there is no M-x adoc-show-version, there is a variable with this name though

From the source file I see, 0.8.0-snapshot

Emacs version

GNU Emacs 28.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.20, cairo version 1.16.0) of 2022-05-30

Operating system

$ uname -a
Linux presidio-x1 5.15.0-102-generic #112~20.04.1-Ubuntu SMP...