From 2d9b38b93eb16b341e91ec5d8eaaa9898f1d68f6 Mon Sep 17 00:00:00 2001
From: Junegunn Choi <junegunn.c@gmail.com>
Date: Sat, 10 Jan 2015 14:22:00 +0900
Subject: [PATCH] Constrain cy in vmove()

---
 src/terminal.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/terminal.go b/src/terminal.go
index c9db8ff..fb17ce5 100644
--- a/src/terminal.go
+++ b/src/terminal.go
@@ -602,6 +602,7 @@ func (t *Terminal) vmove(o int) {
 	} else {
 		t.cy += o
 	}
+	t.cy = Max(0, Min(t.cy, t.merger.Length()-1))
 }
 
 func maxItems() int {