This would backport patch(es) fixing Fedora bug https://bugzilla.redhat.com/show_bug.cgi?id=1254043
(That request was in broader bug 1265207, however QA did not ACK that - too late for them).
nma-1-0: 6ee38dd libnm-gtk: fix a possible crash on widgets destroy (rh #1254043)
Vlad please review.
$ nmcli connection up MysiLiska
evokes the confirmation dialog in gnome-shell (is it the same dialog?) and after Cancel (or ESC) no crash happens and the action is cancelled.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.