From 60f7b05c0c9fbee371dac86229d888aed7b0e7f6 Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Fri, 12 May 2017 11:19:24 +0000
Subject: [PATCH] Regions can't be smaller than 2 so don't try to clear them by
 scrolling if so.

---
 tty.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tty.c b/tty.c
index 720eb417..00460574 100644
--- a/tty.c
+++ b/tty.c
@@ -834,7 +834,10 @@ tty_clear_area(struct tty *tty, const struct window_pane *wp, u_int py,
 		 * If margins are supported, can just scroll the area off to
 		 * clear it.
 		 */
-		if (tty_use_margin(tty) && tty_term_has(tty->term, TTYC_INDN)) {
+		if (nx > 2 &&
+		    ny > 2 &&
+		    tty_use_margin(tty) &&
+		    tty_term_has(tty->term, TTYC_INDN)) {
 			tty_region(tty, py, py + ny - 1);
 			tty_margin(tty, px, px + nx - 1);
 			tty_putcode1(tty, TTYC_INDN, ny);