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From: kiely@lownlab.UUCP (James P. Kiely)
Newsgroups: net.bugs.4bsd,net.text
Subject: [nt]roff loops
Message-ID: <186@lownlab.UUCP>
Date: Wed, 29-Oct-86 16:21:04 EST
Article-I.D.: lownlab.186
Posted: Wed Oct 29 16:21:04 1986
Date-Received: Wed, 29-Oct-86 22:38:02 EST
Organization: Lown Cardiovascular Laboratory, Harvard University
Lines: 27
Xref: mnetor net.bugs.4bsd:989 net.text:1116

Subject: [nt]roff loops
Index:	usr.bin/[tn]roff

Type:	bug
Priority:	medium

Description:
	Both nroff and troff occasionally get into some kind of weird
	loop in which they keep eating up cpu time forever but never
	produce any output.

Repeat-By:
	Run the following:

sed -e '/^\.if[ 	]t/d' -e 's/^\.if[ 	]n[ 	]\././' \
	/usr/lib/tmac/tmac.an | soelim | nroff - /usr/lib/man/man1/true.1

	This causes the loop consistently on a number of machines I have tried.
	This has been tested on a VAX running 4.2BSD, a VAX running Ultrix,
	a VAX running 4.3BSD and an Integrated Solutions (68K cpu) running
	4.2BSD.
-- 
 
NAME:     James P. Kiely                USPS:   Lown Cardiovascular Laboratory
USENET:   ...!harvard!lownlab!kiely             Harvard School of Public Health
PHONE:    +1 617 732 1307                       665 Huntington Avenue
                                                Boston, MA 02115-9915