From e82a6eb990f995c0112509a2505eb25a014fe301 Mon Sep 17 00:00:00 2001
From: Warren Moore <wm@warrenmoore.net>
Date: Tue, 31 May 2022 15:06:42 -0700
Subject: [PATCH] Backends: Metal: Fixed null dereference inside command buffer
 completion handler

---
 backends/imgui_impl_metal.mm | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/backends/imgui_impl_metal.mm b/backends/imgui_impl_metal.mm
index 7023f43ff9b6..ca63ed723755 100644
--- a/backends/imgui_impl_metal.mm
+++ b/backends/imgui_impl_metal.mm
@@ -293,8 +293,10 @@ void ImGui_ImplMetal_RenderDrawData(ImDrawData* drawData, id<MTLCommandBuffer> c
     {
         dispatch_async(dispatch_get_main_queue(), ^{
             ImGui_ImplMetal_Data* bd = ImGui_ImplMetal_GetBackendData();
-            [bd->SharedMetalContext.bufferCache addObject:vertexBuffer];
-            [bd->SharedMetalContext.bufferCache addObject:indexBuffer];
+            if (bd != NULL) {
+                [bd->SharedMetalContext.bufferCache addObject:vertexBuffer];
+                [bd->SharedMetalContext.bufferCache addObject:indexBuffer];
+            }
         });
     }];
 }