Weird Unreproducible Error in 21.1
Vin Shelton writes:
This afternoon I got the following error under a freshly-started
21.1.6. I created a second frame (C-x 5 2) and stretched it out so it
was nearly full-screen width. Immediately after resizing the window
(from the fvwm2 window manager), the mouse tracked across the
rightmost edge of the modeline and I got the following error:
Signaling: (args-out-of-range "-----XEmacs: *scratch* (Lisp
Interaction)----L5--C0--All------------------------------------------------" 179 179)
Thanks for this report. The bug is in balloon-help.
generated-modeline-string is a snapshot of the modeline at last
redisplay. balloon-help uses the value of this variable to
determine whether a help balloon needs to be popped up over part
of the modeline. When you resized the frame,
generated-modeline-string became out of date. So when the mouse
passed over the uncomputed part of the modeline, balloon-help
essentially ran off the end of the string.