Filing a bug report or feature request
If you encounter a bug, misfeature, or missing feature in GLib, please file a bug report on http://bugzilla.gnome.org. We'd also appreciate reports of incomplete or misleading information in the GLib documentation; file those against the "docs" component of the "glib" product in Bugzilla.
Don't hesitate to file a bug report, even if you think we may know about it already, or aren't sure of the details. Just give us as much information as you have, and if it's already fixed or has already been discussed, we'll add a note to that effect in the report.
The bug tracker should definitely be used for feature requests, it's not only for bugs. We track all GLib development in Bugzilla, so it's the way to be sure the GLib developers won't forget about an issue.
If you develop a bugfix or enhancement for GLib, please file that in
Bugzilla as well. Bugzilla allows you to attach files; please attach a
patch generated by the diff utility, using the
-u option to make the patch more readable. All patches
must be offered under the terms of the GNU LGPL license, so be sure you
are authorized to give us the patch under those terms.
If you want to discuss your patch before or after developing it, mail firstname.lastname@example.org. But be sure to file the Bugzilla report as well; if the patch is only on the list and not in Bugzilla, it's likely to slip through the cracks.
There are several mailing lists dedicated to GTK+ and related libraries. Discussion of GLib generally takes place on these lists. You can subscribe or view the archives of these lists on http://mail.gnome.org.
gtk-list covers general GTK+ (and GLib) topics; questions about using GLib in programs, GLib from a user standpoint, announcements of GLib-related projects would all be on-topic. The bulk of the traffic consists of GTK+ programming questions.
gtk-devel-list is for discussion of work on GTK+ (and GLib) itself, it is not for asking questions about how to use GTK+ (or GLib) in applications. gtk-devel-list is appropriate for discussion of patches, bugs, proposed features, and so on.
gtk-doc-list is for discussion of the gtk-doc documentation system (used to document GTK+ and Glib), and for work on the GTK+ (and GLib) documentation.