From 6d071c468cbed78426eebdaab0639dac873cd39f Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Mon, 1 Apr 2019 19:33:38 +0000
Subject: [PATCH] Restore a check to stop scrolled lines becoming larger than
 total lines, fixes a crash reported by Thomas Sattler.

---
 grid.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/grid.c b/grid.c
index f8016356..531afa9d 100644
--- a/grid.c
+++ b/grid.c
@@ -1284,6 +1284,8 @@ grid_reflow(struct grid *gd, u_int sx)
 	if (target->sy < gd->sy)
 		grid_reflow_add(target, gd->sy - target->sy);
 	gd->hsize = target->sy - gd->sy;
+	if (gd->hscrolled > gd->hsize)
+		gd->hscrolled = gd->hsize;
 	free(gd->linedata);
 	gd->linedata = target->linedata;
 	free(target);