nmtui can crash during activation.
This is fixed in upstream. Needs to be backported.
See upstream bug https://bugzilla.gnome.org/show_bug.cgi?id=755883
1.) start nmtui in one terminal and activate a connection that asks for secret (and just leave the password-dialog haning).
2.) in another terminal, start nmtui and activate another connection so that you would also see the password dialog there.
Instead of the password dialog, #2 crashes.
btw. the patch is very trivial and quite obviously correct:
so, low-risk patch :)
Reproduced crasher with -13. Verified the TUI crash does not happen with NetworkManager-1.0.6-14.el7.
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.