🚀 go-pugleaf

I just loaded epoch 4.0.1 (which as I understand it is the latest,
official-release version) on my Silicon Graphics 4D/70GT running IRIX 4.0.1.

I've been seeing display corruption problems.  When I visit a file,
move the cursor down a few lines, and insert a character, a character
after the insertion point will disappear.  At this point, merely
moving the cursor back and forth along the line will cause characters in the
line to appear and disappear.  This is Very Bad -- I've never seen anything
like this with epoch before.

M-x recenter restores the display to correctness, so the problem is not with
the underlying text data structure.  I don't think it's a font problem either
(I'm using *sony*120*, which is a normal-sized, fixed-width font); epoch
doesn't seem confused about where the character boundaries are.

The annoying thing is, it's not repeatable.  The corruption only happens
"some of the time".  Perhaps it's some internal buffer-boundary condition?
Doing heavy editing, I'll typically see corruption about ten times a day.

This appears to be a regression from epoch 4.0 beta (b3?), which I
built and ran previously with the exact same hardware, compiler, OS
version, X server, .emacs file, screen layout, etc. (I always use
exactly two 80x62 epoch windows, side by side).  I never saw any
display corruption with 4.0 beta or earlier.

Either this is an SGI compiler, OS, or X bug that is being triggered
by something that changed from epoch 4.0b3 to epoch 4.0.1, or it is a
regression in epoch itself.

If anyone else has seen this problem on SGI or other platforms, I'd appreciate
hearing from you.

Craig Dunwoody
dunwoody@sgi.com
(415) 962-3635
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Craig Dunwoody
dunwoody@sgi.com
(415) 962-3635