Comment 5 for bug 1636533

Steps to reproduce crash from scratch:

1) launch inkscape (default prefs, default new doc)
2) draw a shape
3) apply a filter effect
4) group it (Ctrl+G), copy (Ctrl+C)
5) open new document (Ctrl+N)
6) draw a shape
7) group it (Ctrl+G), clone the group (Alt+D)
8) move clone aside
9) add a new layer (Ctrl+Shift+N)
10) move original group to new layer
11) enter group (Ctrl+Enter), paste (Ctrl+V)