From 7d179b45f7e441af018d08c6f36f43f48af50b6e Mon Sep 17 00:00:00 2001
From: Nolan Darilek <nolan@thewordnerd.info>
Date: Wed, 26 Jan 2022 14:56:52 -0600
Subject: [PATCH] Fix a crash.

---
 src/pathfinding.rs | 47 +++++++++++++++++++++++-----------------------
 1 file changed, 24 insertions(+), 23 deletions(-)

diff --git a/src/pathfinding.rs b/src/pathfinding.rs
index dbab0f5..4079e66 100644
--- a/src/pathfinding.rs
+++ b/src/pathfinding.rs
@@ -220,29 +220,30 @@ fn calculate_path(
                 .remove::<Speed>();
             continue;
         }
-        let map = map.single();
-        let coordinates_clone = *coordinates;
-        let destination_clone = *destination;
-        let query_pipeline_clone = query_pipeline.clone();
-        let map_clone = map.clone();
-        let shape_clone = (*shape).clone();
-        let collider_set: StaticColliderComponentsSet = (&collider_query, &obstructions).into();
-        let task = pool.spawn(async move {
-            find_path_for_shape(
-                entity,
-                coordinates_clone,
-                destination_clone,
-                query_pipeline_clone,
-                map_clone,
-                collider_set,
-                shape_clone,
-            )
-        });
-        commands
-            .entity(entity)
-            .insert(Calculating(task))
-            .remove::<Path>()
-            .remove::<NoPath>();
+        if let Ok(map) = map.get_single() {
+            let coordinates_clone = *coordinates;
+            let destination_clone = *destination;
+            let query_pipeline_clone = query_pipeline.clone();
+            let map_clone = map.clone();
+            let shape_clone = (*shape).clone();
+            let collider_set: StaticColliderComponentsSet = (&collider_query, &obstructions).into();
+            let task = pool.spawn(async move {
+                find_path_for_shape(
+                    entity,
+                    coordinates_clone,
+                    destination_clone,
+                    query_pipeline_clone,
+                    map_clone,
+                    collider_set,
+                    shape_clone,
+                )
+            });
+            commands
+                .entity(entity)
+                .insert(Calculating(task))
+                .remove::<Path>()
+                .remove::<NoPath>();
+        }
     }
 }