[Wayland-bugs] [Bug 738873] wayland backend aborts entire program if XDG_RUNTIME_DIR unset

[gtk+ (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=738873
  gtk+ | Backend: Wayland | unspecified

--- Comment #1 from Ryan Lortie (desrt) <desrt at desrt.ca> 2014-10-20 21:43:47 UTC ---
Created an attachment (id=288986)
 View: https://bugzilla.gnome.org/attachment.cgi?id=288986
 Review: https://bugzilla.gnome.org/review?bug=738873&attachment=288986

wayland: don't init if XDG_RUNTIME_DIR missing

wayland doesn't strictly follow the XDG_RUNTIME_DIR spec by falling back
to another directory in case the runtime dir is not properly set.

When this variable is unset, wayland will log an error to us, which we
treat as fatal, aborting the entire program.

Skip ourselves all the trouble and don't try to bring up the wayland
backend when we know it will fail in this way.

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