From 1163a688bcceef83801dcaffe6041f86e41486c3 Mon Sep 17 00:00:00 2001
From: mjarkk <mkopenga@gmail.com>
Date: Mon, 6 May 2019 19:36:23 +0200
Subject: [PATCH] Added some extra error checks to solve the first error

---
 gui.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gui.go b/gui.go
index 4ff91ec..119b533 100644
--- a/gui.go
+++ b/gui.go
@@ -572,7 +572,7 @@ func corner(v *View, directions byte) rune {
 // drawFrameCorners draws the corners of the view.
 func (g *Gui) drawFrameCorners(v *View, fgColor, bgColor Attribute) error {
 	if v.y0 == v.y1 {
-		if !g.SupportOverlaps {
+		if !g.SupportOverlaps && v.x0 >= 0 && v.x1 >= 0 && v.y0 >= 0 && v.x0 < g.maxX && v.x1 < g.maxX && v.y0 < g.maxY {
 			if err := g.SetRune(v.x0, v.y0, '╶', fgColor, bgColor); err != nil {
 				return err
 			}