GNOME Bugzilla – Bug 692044
treeselection does not release references if treeview is destroy()ed
Last modified: 2018-01-10 20:22:02 UTC
Created attachment 233810 [details]
Script showing the issue
Leaves a reference hanging around on mycb. This doesn't happen if destroying a gtkcontainer with a child widget that has a callback. The attached script demos it a bit better. It might be specific to using gtkbuilder.
I didn't have this problem with pygtk2.
It looks like this problem was already fixed in bug 685598. Please reopen if this is not the case. Thanks.
>>> import sys
>>> from gi.repository import Gtk
>>> def fn(*args):
>>> tv = Gtk.TreeView()
>>> tv.get_selection().connect('changed', fn)
*** This bug has been marked as a duplicate of bug 685598 ***
Hi Simon, thanks for the quick response.
However I installed pygobject-3.7.4 from Fedora, and the issue still reproduces with my script. The __del__ handler is not invoked for the second set of output.
It seems like the builder object is holding a reference to the selection object and there is a circular reference with the Python handler/mygobj and the builder. Explicitly setting builder to None makes this go away. What is unclear to me at this point is actually how the first example is working :)
g2.builder = None
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