Spawning Weston (+Xwayland) within tmux kills the X connection
This may be related to of #161.
Effectively starting Xwayland enabled weston in tmux kills the X connection and the following can be observed in
weston: segfault at 7f3af2433d50 ip 00007f3af2433d50 sp 00007ffdc8fa9268 error 14 in libXdmcp.so.6.0.0
Note that the X session is still alive, although the connection itself is hosed.
$ pgrep Xserver | wc -l -> 1 while
$ DISPLAY=:0 app fails