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From: joe@dual.UUCP (Joe Weinstein)
Newsgroups: net.unix,net.unix-wizards,net.bugs
Subject: A Vi Bug, and the Fix For It.
Message-ID: <1256@dual.UUCP>
Date: Wed, 23-Jul-86 13:19:34 EDT
Article-I.D.: dual.1256
Posted: Wed Jul 23 13:19:34 1986
Date-Received: Thu, 24-Jul-86 03:29:29 EDT
Reply-To: joe@dual.UUCP (Joe Weinstein)
Organization: Dual Systems Corp. Berkeley, Ca.
Lines: 23
Xref: mnetor net.unix:5003 net.unix-wizards:7249 net.bugs:289

Hello.

There is a bug in vi that comes up in this fashion:

%vi foo.c

:0r bar.c       /* The 'read' command can be given a line number. */
                /* This will work fine, but...                    */

u               /* the 'undo' command will not do the expected!   */
		(This bug does not occur when using ex)

The fix is to change one line in the routine rop() in the file ex_io.c:

                undap1 = undap2 = dot + 1;
     becomes:
                undap1 = undap2 = addr2 + 1;

	Write me if you use this fix. I just want to see who cares...

		Joe Weinstein at Dual Systems Corp.
				2530 San Pablo Ave.
				Berkeley, Ca. 94702	415-549-3854