Looks like the new patch isn't applied because the spec does not use %autosetup or %patch.
I think the build would fail if it was applied, though, because this patch is already included in upstream 1.16.1. So I would remove the patch from the source package and just close the associated bug.
My only guess is that /usr/bin/bst somehow uses the version of bst I have installed with pip.
Testing this again, I get 1.4.1 (but this also matches the version of bst I currently have installed with pip, whereas I had 1.2 installed earlier...).
IMO there are too many theme changes in this update (particularly: blue radio buttons and checkbuttons) for it to be suitable for Fedora 30. I'd vote to either hold F30 to GTK 3.24.10 or else manually revert the theme changes.
atim, is your crash caused by this update? If so (e.g. the crash goes away when you downgrade) then please leave -1 karma. Otherwise, don't leave any karma.
I'll look at your bug report if you please leave a link to it. (I don't see any new ones reported today.)
This update should probably be reserved for rawhide because it contains API/ABI breaks and will probably break gst-plugins-bad, see: https://gitlab.com/freedesktop-sdk/freedesktop-sdk/merge_requests/1457#note_185356074