From b1a164fefe3b20130b6a381126c77fa9b0701eaa Mon Sep 17 00:00:00 2001
From: Pierre Baillargeon <Pierre.Baillargeon@autodesk.com>
Date: Mon, 5 Feb 2024 10:45:38 -0500
Subject: [PATCH] EMSUSD-987 undo edit prototype

Editing as Maya an instanced object and then undoing the edit-as-Maya would
crash. That was because when editing an instance, Maya nodes were briefly
created for the prototype, registered as newly-created nodes, then immediately
deleted. When undoing, the undo was trying to delete those non-existing nodes.

Fix by removing the deleted node from the map of created Maya nodes.
---
 lib/mayaUsd/fileio/jobs/readJob.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/mayaUsd/fileio/jobs/readJob.cpp b/lib/mayaUsd/fileio/jobs/readJob.cpp
index fa0fef420f..9275414a3d 100644
--- a/lib/mayaUsd/fileio/jobs/readJob.cpp
+++ b/lib/mayaUsd/fileio/jobs/readJob.cpp
@@ -676,6 +676,7 @@ bool UsdMaya_ReadJob::_DoImport(UsdPrimRange& rootRange, const UsdPrim& usdRootP
                     }
                 }
                 deletePrototypeMod.deleteNode(prototypeObject, false);
+                mNewNodeRegistry.erase(prototypePath.GetString());
             }
             prototypesLoop.loopAdvance();
         }