SAM trait coercion via middle interface

trait T {
    abstract def foo(int i)

    def bar(double j) {
        println "bar $j"
    }
}
interface F extends T {}

F t = { println "closure $it" }
t.foo(42) // `closure 42`
t.bar(43) // `closure 43.0`; should be `bar 43.0`