From d20ab66741c46f531d4af5b631769f092b837769 Mon Sep 17 00:00:00 2001
From: Dzmitry Malyshau <dmalyshau@mozilla.com>
Date: Mon, 1 Mar 2021 16:34:01 -0500
Subject: [PATCH] Force-drop the token before calling fire_map_callbacks

---
 wgpu-core/src/device/queue.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/wgpu-core/src/device/queue.rs b/wgpu-core/src/device/queue.rs
index c93b45e0c1..2ab92d5210 100644
--- a/wgpu-core/src/device/queue.rs
+++ b/wgpu-core/src/device/queue.rs
@@ -815,6 +815,8 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
             callbacks
         };
 
+        // the map callbacks should execute with nothing locked!
+        drop(token);
         super::fire_map_callbacks(callbacks);
 
         Ok(())