[6043] in Athena Bugs

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(VS3100) Version 7.1H: emacs zero-height window core dump

daemon@ATHENA.MIT.EDU (Mark W. Eichin)
Fri Sep 14 16:20:45 1990

Date: Fri, 14 Sep 90 16:20:30 -0400
From: Mark W. Eichin <eichin@ATHENA.MIT.EDU>
To: bugs@ATHENA.MIT.EDU

System type, version:	(VS3100) Version 7.1H
System name:		e40-008-11
What's wrong:

emacs dumps core with abort() when it tries to redisplay a line which
is off the screen (ie. line -1). This happens particularly when it
thinks a window starts on line zero and is zero height, putting the
mode line on line -1. (window is used here in the emacs sense, not the
X sense.) Under some circumstances, both my zwgc.el and bjaspan's will
trigger this.

What should have happened:

It is unacceptable for *any* in elisp code to trigger an abort().
Those aborts are "never happens" flags - they occur in pieces of code
which should never be executed unless there is a bug in emacs.


						_Mark_

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