From ca0fc1af0fd478269d2df5c75eb7a181207205da Mon Sep 17 00:00:00 2001
From: Sean Donnelly <23455376+seando-adsk@users.noreply.github.com>
Date: Tue, 19 Jul 2022 12:39:36 -0400
Subject: [PATCH] Check for invalid prim, which is possible from Display Layer
 that contains invalid paths (because of Variant Change).

---
 lib/mayaUsd/render/vp2RenderDelegate/proxyRenderDelegate.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/mayaUsd/render/vp2RenderDelegate/proxyRenderDelegate.cpp b/lib/mayaUsd/render/vp2RenderDelegate/proxyRenderDelegate.cpp
index e972449e2e..994a8b5807 100644
--- a/lib/mayaUsd/render/vp2RenderDelegate/proxyRenderDelegate.cpp
+++ b/lib/mayaUsd/render/vp2RenderDelegate/proxyRenderDelegate.cpp
@@ -803,6 +803,9 @@ void ProxyRenderDelegate::_UpdateSceneDelegate()
 #ifdef MAYA_HAS_DISPLAY_LAYER_API
 void ProxyRenderDelegate::_DirtyUsdSubtree(const UsdPrim& prim)
 {
+    if (!prim.IsValid())
+        return;
+
     HdChangeTracker&      changeTracker = _renderIndex->GetChangeTracker();
     constexpr HdDirtyBits dirtyBits = HdChangeTracker::DirtyVisibility
         | MayaUsdRPrim::DirtyDisplayMode | MayaUsdRPrim::DirtySelectionHighlight;