When I connect to openvpn via the NetworkManager applet in KDE, the connection
gets lost in several seconds, after which I am not able to reconnect. Dmesg
reads as follows:

[35212.123373] tun: Universal TUN/TAP device driver, 1.6
[38811.702156] gdbus[1386]: segfault at 18 ip 00007fd99f34a6fa sp
00007fd9977fd930 error 4 in libc-2.27.so[7fd99f2c8000+1b6000]
[38811.702170] Code: 00 e8 aa e7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 48 89 c2
48 83 e2 f8 49 3b 54 15 00 0f 85 36 02 00 00 49 8b 55 10 49 8b 4d 18 <4c> 39 6a
18 75 60 4c 39 69 10 75 5a 48 89 4a 18 48 89 51 10 48 3d 

The error is reproducible. It appeared after a recent (within say 2 months) TW
upgrade.