Comment 25 for bug 1283551

From desktop-devel-list[1]:
Hello all,

I just landed https://bugzilla.gnome.org/show_bug.cgi?id=729662, which
introduces a new attribute in gobject-introspection typelibs that is
critical for correct memory management in language bindings.
While the bug should not affect many functions (only those that
unref/free their instance arguments), and primarily we saw crashes in
gjs caused by Gio, it is hard to determine if a library is affected or
not automatically, and therefore it would be best if all typelibs
would be rebuilt with the new gobject-introspection, now or as soon as
a release is available.
This in particular to avoid reports against gjs or pygobject that
would be hard to debug for developers under different distros or using
jhbuild packages with the fix.

Cheers

Giovanni
https://mail.gnome.org/archives/desktop-devel-list/2014-July/msg00003.html