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From: bill@hpcvlx.HP.COM (Bill Frolik)
Newsgroups: comp.emacs
Subject: GNU 18.52 redisplay problem
Message-ID: <101120002@hpcvlx.HP.COM>
Date: 23 Mar 89 16:39:23 GMT
Organization: Hewlett-Packard Co., Corvallis, OR, USA
Lines: 38



Has anyone else out there seen the problem I'm seeing in GNU Emacs 18.52?
Put the cursor at the start of a line of text, and have a fairly long line
of text on the line immediately above it.  Now do something like, say, a
kill-line.  The text on the current line disappears, as it should, but then
the last 9 characters of the previous line get replicated at the start of
the line I just wiped out, and the cursor and everything else get bumped
down one line.  For example:


Before:		This is a long line of text to show what might happen.
		_Cursor is here, this line will get killed.
		Other text follows.


After:		This is a long line of text to show what might happen.
		t happen.
		_
		Other text follows.


Sometimes I see this with other functions, too.  Like, in the "before" case,
when the cursor is where I've indicated, maybe all I need to do is insert
a tab; everything drops down a line and the tail end of the previous line
appears.

If I do a ^L the ghost line disappears, and everything is fine.  This problem
doesn't happen all the time, I haven't pinned down exact circumstances to 
guarantee it will happen.  Have I got some variable set wrong, is it pilot
error, or is there a bug in the redisplay code?

I'm running GNU Emacs 18.52 under SCO's 386 XENIX on an HP Vectra RS/25C.

________________________________________

Bill Frolik	Hewlett-Packard Co
hp-pcd!bill	Corvallis, Oregon