[Pharo-users] OrderedCollection remove:

Hi, I've just run into quite a nasty surprise ~~~~~~~~~~~~~~~~ col := #(1 2 3 4 5) asOrderedCollection. col do: [ :each | col remove: each. ]. col ~~~~~~~~~~~~~~~~ it throws "NotFound: nil not found in OrderedCollection" I tested it also in Pharo3 and there it just silently removed first, third and fifth element. Looking at the implementation of OrderedCollection>>do: it seems that doing what I'm doing is a bad idea. So what shall one do:? col copy do: [...] ? Why can't do: be a bit smarter? Optimization? Thanks, Peter