Closing the main dialog associated with a running script is probably not the
nicest thing to do. Once the dialog has been closed, another dialog pops up with
comments about the plug-in may have died and the number of times the message has
been repeated. The warning message seems to be appearing for each attempt to
update the progress bar (which is a lot of times). The script will run to
completion and the updated image will appear but script-fu dies with a
segmentation fault.

I wouldn't be surprised to learn that this problem can be reproduced by closing
most (all?) of the other scripts which use the progress bar. It shouldn't be too
hard to track down what is causing the seg fault.

Closing the window is equivalent to pressing the Cancel button in the dialog. I
might be wrong but I think the effect of pressing Cancel is to kill Script-Fu.
So this would be a duplicate of bug #109605.

Eeek, actually it appears to be gimp that is crashing here, not Script-Fu:

gimp-2.3: fatal error: Segmentation fault
gimp-2.3 (pid:3151): [E]xit, [H]alt, show [S]tack trace or [P]roceed: s

+ Trace 61426

It's simple to prohibit further use of the progress pdb callback after it has
failed once. I added two lines of code to app/pdb/gimppdbprogress.c and it stops
the warning to be repeated over and over again. But since the script continues
to run w/o any progress indication then, that is probably not the right fix or
only part of it.

The cancel button is insensitive while the script is running, so the
right thing to do would be to ignore closing the window as well.

Fixed in both branches:

2005-09-11  Michael Natterer  <mitch@gimp.org>

	* plug-ins/script-fu/script-fu-interface.c (script_fu_response):
	bail out if the action_area is insensitive. Ignores attempts to
	close the window while the script is running. Fixes bug #308662.