From 1078c389f993e9f2107af148eeb6c8a0311d3183 Mon Sep 17 00:00:00 2001
From: Haoyu Qiu <timothyqiu32@gmail.com>
Date: Sat, 18 Dec 2021 15:53:21 +0800
Subject: [PATCH] Fix crash when executing `TileMap.map_pattern`

Validates the input reference.
---
 scene/2d/tile_map.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/scene/2d/tile_map.cpp b/scene/2d/tile_map.cpp
index 084a5a520dc..2ad64768124 100644
--- a/scene/2d/tile_map.cpp
+++ b/scene/2d/tile_map.cpp
@@ -2104,6 +2104,7 @@ Ref<TileMapPattern> TileMap::get_pattern(int p_layer, TypedArray<Vector2i> p_coo
 }
 
 Vector2i TileMap::map_pattern(Vector2i p_position_in_tilemap, Vector2i p_coords_in_pattern, Ref<TileMapPattern> p_pattern) {
+	ERR_FAIL_COND_V(p_pattern.is_null(), Vector2i());
 	ERR_FAIL_COND_V(!p_pattern->has_cell(p_coords_in_pattern), Vector2i());
 
 	Vector2i output = p_position_in_tilemap + p_coords_in_pattern;