GtkBox memory leak?

[Matt Bucknall <matt mattbucknall com>]

Hi,

I'm currently implementing a custom container widget and I've been using 
the source code for GtkBox as as reference 
(http://svn.gnome.org/svn/gtk+/trunk, revision 21712). I'm wondering 
whether I've found a bug or if there is something I am missing about 
container destruction:

In 'gtkbox.c: gtk_box_pack ()', every time a new child is added to a 
GtkBox container, a GtkBoxChild object is created and stored in the 
GtkBox's children GList. When gtk_box_remove() is called to remove a 
child widget from a GtkBox container, the associated GtkBoxChild object 
is destroyed. When a GtkBox container itself is destroyed, its parent 
invokes 'gtk_box_forall' passing gtk_widget_destroy as the callback to 
destroy all the container's child widgets. What I cannot see is how, in 
the latter case, all the GtkBoxChild objects associated with the child 
widgets are destroyed. Is there some hidden mechanism at play here, or 
is there a bug?

If I could get mtrace to show me some symbol names, I'd have a better 
idea about what's going on, but I can't get that to work right now.

Matt.