===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/less/brac.c,v
retrieving revision 1.9
retrieving revision 1.10
diff -u -r1.9 -r1.10
--- src/usr.bin/less/brac.c	2015/11/09 16:39:13	1.9
+++ src/usr.bin/less/brac.c	2021/10/09 15:27:18	1.10
@@ -75,6 +75,8 @@
 	nest = 0;
 	while ((c = (*chget)()) != EOI) {
 		if (c == obrac) {
+			if (nest == INT_MAX)
+				break;
 			nest++;
 		} else if (c == cbrac && --nest < 0) {
 			/*