From b43126f3034dc3e916299cbf2be9fc829f8fe796 Mon Sep 17 00:00:00 2001
From: Ali Gholami Rudi <ali@rudi.ir>
Date: Wed, 7 Mar 2018 16:57:30 +0330
Subject: [PATCH] term: ignore movements beyond the scrolling region

---
 term.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/term.c b/term.c
index 0055e83..eeb62d4 100644
--- a/term.c
+++ b/term.c
@@ -648,12 +648,14 @@ static void advance(int dr, int dc, int scrl)
 	if (dr && r >= bot && scrl) {
 		int n = bot - r - 1;
 		int nr = (bot - top) + n;
-		scroll_screen(top + -n, nr, n);
+		if (nr > 0)
+			scroll_screen(top + -n, nr, n);
 	}
 	if (dr && r < top && scrl) {
 		int n = top - r;
 		int nr = (bot - top) - n;
-		scroll_screen(top, nr, n);
+		if (nr > 0)
+			scroll_screen(top, nr, n);
 	}
 	r = dr ? LIMIT(r, top, bot - 1) : r;
 	c = LIMIT(c, 0, pad_cols() - 1);
-- 
2.11.4.GIT