Synaptic segfault on GNOME on Wayland

[Fred]

Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.
Segmentation fault (core dumped)
No protocol specified
Failed to connect to Mir: Failed to connect to server socket: No such file or directory
Unable to init server: Could not connect: Connection refused

(synaptic:4245): Gtk-WARNING **: cannot open display: :1

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: synaptic 0.83+nmu1ubuntu1
ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
Uname: Linux 4.8.0-22-generic x86_64
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
Date: Wed Oct 12 17:59:53 2016
InstallationDate: Installed on 2013-12-26 (1020 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
SourcePackage: synaptic
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Andreas Brauchli (blk)]

On Wayland, graphical applications can't be run as root from terminal

https://fedoraproject.org/wiki/How_to_debug_Wayland_problems
https://bugzilla.redhat.com/show_bug.cgi?id=1274451

[Andreas Brauchli (blk)]

..having said that, the redhat bug has a few proposed workarounds. One shell script that may or may not work for your specific issue (tested only for synaptic, Qt apps may not work without change) would be the following one that, since I like Italian tomato sauce, I call it sugo:

#!/bin/sh
[ -n "$@" ] || exit 0
xhost si:localuser:root
sudo $@
xhost -si:localuser:root

[Jesse (jessedubord)]

I can confirm this bug is happening on Ubuntu GNOME 17.04 under Wayland session. Running from terminal produces the following:

Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.
Segmentation fault (core dumped)

[Gerhard (gerhard-rauniak-gmail)]

Same problem on Ubuntu 17.10 Beta.

[Fadi Racy (mo-mashi)]

Still there Ubuntu 17.10
sugo is an excellent name.

[Fadi Racy (mo-mashi)]

I only get this if I try to run synaptic without root access:
bash -c 'xhost +local:$(whoami);synaptic && xhost -' or bash -c 'xhost +local:$(whoami);synaptic'

this works fine: bash -c "xhost +SI:localuser:root;pkexec synaptic" but it's insecure and leaves my sudo password up for sniffing.