Inverting the order of patterns (and following Lisa's idea) makes the problem
go away:
rule "asdf"
when
OtherType( $member : member )
Interface( this == $member )
then
// do whatever with $member
end
This can be constrained to a subset of subclasses if there is also
ConcreteType3 extends Interface which should not be matched by adding
expressions using instanceof.
-W
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