Blender crashes when duplicating a node editor with an active
compositor session. That's because the runtime data of the editor is
nullptr upon duplication. This is a regression in 51a7961e09, where the
runtime data was set to nullptr upon duplication, while it should be
assigned a newly allocated structure or duplicate the existing
structure. To fix this, we do the former and allocate a new structure
because that's what the developer intended in the original patch.
The crash is rare and went unnoticed because the runtime data is
initialized in the init method as well, which typically gets called
quickly right after the area is duplicated.
Pull Request: https://projects.blender.org/blender/blender/pulls/122506
1c315c62d2