Please describe the problem:
In GIMP 2.3, image windows can be moved to another X display after opening that
display with the View->Move to Screen menu. After GIMP opens a second display,
if it loses the connection to that display (server shutdown, xkill, etc) the
whole application aborts.

Steps to reproduce:
1. Open an image
2. View->Move to Screen->Open Display and connect to another X server. I used an
SSH connection from another machine with X forwarding, Xnest or maybe Xvnc
should work also.
3. Optional: move an image window to the new screen (it's already connected, so
it will still crash without doing this)
4. Terminate the remote X server


Actual results:
GIMP prints the following on the terminal and exits with status 1

The application 'gimp-2.3' lost its connection to the display localhost:10.0;
most likely the X server was shut down or you killed/destroyed
the application.

(script-fu:1563): LibGimpBase-WARNING **: script-fu: wire_read(): error

Expected results:
GIMP should gracefully disconnect from the display, but otherwise continue
running and delete any windows on the affected display, or move them to another
display. I think the best solution would be moving a window back only if the
image doesn't have any windows on active displays.

Does this happen every time?
yes

Other information: