See https://bugzilla.redhat.com/show_bug.cgi?id=862161


commit 677e8ab4086208f06b988d98b247aeb53e554638
Author: William Jon McCann <jmccann@redhat.com>
Date:   Tue Sep 11 00:21:34 2012 -0400

    Don't leak pango languages
    
    Signed-off-by: Richard Hughes <richard@hughsie.com>

diff --git a/contrib/gtk-module/pk-gtk-module.c b/contrib/gtk-module/pk-gtk-module.c
index 8145848..2c93f02 100644
--- a/contrib/gtk-module/pk-gtk-module.c
+++ b/contrib/gtk-module/pk-gtk-module.c
@@ -252,8 +252,7 @@ pk_pango_fc_font_map_load_fontset (PangoFontMap *font_map,
         * code instead of "xx"... */
        if (G_LIKELY (language == last_language) ||
            language == NULL ||
-           language == pango_language_from_string ("C") ||
-           language == pango_language_from_string ("xx"))
+           pango_language_matches (language, "C;xx"))
                return fontset;
 
        if (G_UNLIKELY (!seen_languages))

The old code didn't leak - pango_language_from_string() doesn't return memory that needs to be free - and the new code doesn't work since it would have to be:

 pango_language_matches (language, "c;xx")

to work - pango_language_matches() doesn't canonicalize the pattern.