it "evaluates block pass after receiver" do
      p1 = proc {true}
      p2 = proc {false}
      p1.should_not == p2

      obj = @obj
      logic = proc do
        p = p1
        (p = p2; obj).foo0(&p).should == [false]
        p = p1
        (p = p2; obj).foo1(1, &p).should == [1, false]
        p = p1
        (p = p2; obj).foo2(1, 1, &p).should == [1, 1, false]
        p = p1
        (p = p2; obj).foo3(1, 1, 1, &p).should == [1, 1, 1, false]
        p = p1
        (p = p2; obj).foo4(1, 1, 1, 1, &p).should == [1, 1, 1, 1, false]
        p = p1
      end

      # once with self == obj, to test fcalls
      obj.instance_eval(&logic)

      # and once with self = spec body, to test calls
      logic.call
    end