From b0625b49ef265ca42df81fcea7fbbd6b4dbf8a5b Mon Sep 17 00:00:00 2001
From: Florian Fischer <florian.fischer@muhq.space>
Date: Fri, 20 Jan 2023 03:25:14 +0100
Subject: sanity check calculated x and y before using it as slice index

---
 assets/symbols/gear.png | Bin 50696 -> 22330 bytes
 go/ui/mapView.go        |   4 ++++
 2 files changed, 4 insertions(+)

diff --git a/assets/symbols/gear.png b/assets/symbols/gear.png
index 821d7e84..d675856e 100644
Binary files a/assets/symbols/gear.png and b/assets/symbols/gear.png differ
diff --git a/go/ui/mapView.go b/go/ui/mapView.go
index c292d526..43ea0f01 100644
--- a/go/ui/mapView.go
+++ b/go/ui/mapView.go
@@ -173,6 +173,10 @@ func (vw *MapView) FindObjectAt(x_px, y_px int) interface{} {
 	x := x_px / TILE_WIDTH
 	y := y_px / TILE_HEIGHT
 
+	if x < 0 || y < 0 {
+		return nil
+	}
+
 	// TODO: detect if a permanent or the containing tile was selected
 	for _, u := range vw.gameState.Permanents {
 		pos := u.GetTile().Position
-- 
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