Looks like the crash actually occurs when you try to drag an orphaned curve dragpoint that is created when you undo the creation of certain nodes. I added a call to hide the dragpoint before processing an undo operation, which should fix it.
Looks like the crash actually occurs when you try to drag an orphaned curve dragpoint that is created when you undo the creation of certain nodes. I added a call to hide the dragpoint before processing an undo operation, which should fix it.