bugreport: regex escape

Hi

I think have found a bug while using Midnight Commander's extension/file matching feature.

It seems that the glib 2.76.4->2.76.5 upgrade broke a regex-filematching. (Same goes for 2.77.2->2.77.3)

Example:

mc.ext.ini:

[something] Regex=.my_extension$ Open=echo "opening: " %f

This does not match anymore for asdf.my_extension. The problem is the ".".

git bisect points me to these commits on both minor versions:

2.76.4->5: 3fd1b634 2023-08-29 15:32:27 +0200 | gkeyfile: Fix overwriting of GError

2.77.2->3: 71b7efd0 2023-08-29 15:32:27 +0200 | gkeyfile: Fix overwriting of GError

On first glance it has something to do with backslashes, but it might be a midnight commander bug after all.

core/glibc 2.38-3

extra/mc 4.8.30-1

core/linux 6.4.12.arch1-1

Br,

Tibor