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ebrowse hangs emacs w/ scrolling option conflict

From: Michael L. Labbe
Subject: ebrowse hangs emacs w/ scrolling option conflict
Date: Wed, 02 Apr 2003 08:54:36 -0800

oboy, my first bug!

emacs-version: Emacs 21.2.1 (i386-msvc-nt5.0.2195) on buffy
also affected: Emacs 21.1.1 (i386-msvc-nt5.0.2195) on buffy

Configure commands: Downloaded binary install from

Modifications to source: None

The complete text of any files needed to reproduce the bug:
Please un-bzip it before reproducing the bug.  In order to use the
dribble file, copy the file to "~".


Setting the scroll margin to a large number causes some sort of a
logic error in the display code of an ebrowse buffer.  The browse file
I have given you is of my current project, which contains enough data
to need to be scrolled on the default window size. ( Of course I
produced this dribble file with emacs -q! )

The freeze is tough enough that I can't seem to get out of it with
C-g, and C-break doesn't work on my keyboard.  Emacs does seem to be
getting the window redraw commands though, so it isn't a stiff lock.
100% cpu usage does ensue, however.

Scrolling to the bottom of the buffer with next-line doesn't cause the
hang.  The scroll-margin with the addition of the mouse wheel hopping
multiple lines is what gets it stuck in an infinite loop.

Dribble file:

Don't hesitate to ask if you have any questions.  I check my email
more frequently than is healthy.

Michael L. Labbe

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