From de08e47e5bc94afdee81fd99f838100fc577a98c Mon Sep 17 00:00:00 2001
From: Cole Miller <cole@zed.dev>
Date: Sat, 4 Jan 2025 15:37:40 -0500
Subject: [PATCH] Improve panic report with reentrant SlotMap use (#22667)

`double_lease_panic` already does what we want, just extend it to the
indexing operation as well.

Release Notes:

- N/A
---
 crates/gpui/src/app/entity_map.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/crates/gpui/src/app/entity_map.rs b/crates/gpui/src/app/entity_map.rs
index 07aa466295..8bf9c67269 100644
--- a/crates/gpui/src/app/entity_map.rs
+++ b/crates/gpui/src/app/entity_map.rs
@@ -117,8 +117,9 @@ impl EntityMap {
 
     pub fn read<T: 'static>(&self, model: &Model<T>) -> &T {
         self.assert_valid_context(model);
-        self.entities[model.entity_id]
-            .downcast_ref()
+        self.entities
+            .get(model.entity_id)
+            .and_then(|entity| entity.downcast_ref())
             .unwrap_or_else(|| double_lease_panic::<T>("read"))
     }