From 6fdaaa06372302f0c35e128d34a9fbd19de9cd00 Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Mon, 11 Sep 2017 06:40:46 +0000
Subject: Do not free more lines than are available in the history.

---
 grid.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'grid.c')

diff --git a/grid.c b/grid.c
index c26db476..aa9aea4c 100644
--- a/grid.c
+++ b/grid.c
@@ -292,12 +292,14 @@ grid_collect_history(struct grid *gd)
 {
 	u_int	ny;
 
-	if (gd->hsize < gd->hlimit)
+	if (gd->hsize == 0 || gd->hsize < gd->hlimit)
 		return;
 
 	ny = gd->hlimit / 10;
 	if (ny < 1)
 		ny = 1;
+	if (ny > gd->hsize)
+		ny = gd->hsize;
 
 	/*
 	 * Free the lines from 0 to ny then move the remaining lines over
-- 
cgit