From the release note * Updated dependencies: * Python 3.6 * GTK+ 3.20 * GLib 2.48 * GtkSourceView 4.0 * pygobject 3.30 * pycairo 1.15 And also when running it just stop at pygobject version check
As a side note, this port should not have been updated to this version to begin with. This software follows the even-odd split, where odd versions are developmental releases.
(In reply to Charlie Li from comment #1) This should be documented in the Makefile
I reverted the update in r552342, and also merged that to quarterly, so meld should now work again. I did have to bump PORTEPOCH for this, obviously.