From: [email-masked]
Date: Tue, 5 Oct 1993 16:27:59 -0400

please apply the following patch to samterm/mesg.c to fix the
protocol synchronization problem:

562a561
< 			t->lock++;

the context of the change is:

				panic("hcheck request==0");
			outTsls(Trequest, m, a, (int)n);
			outTs(Tcheck, m);
>			t->lock++;
			t->lock++;
			reqd++;

the bug has existed for a long time; it is probably a remnant of the
original design where text-locks were non-accumulative.  the bug usually
manifests itself when there is a slow channel between sam and samterm.