Default methods on closures coerced to interfaces don't work

import java.util.function.Consumer

def consume(Consumer<String> consumer) {
  consumer
    .andThen({ println "2" })
    .accept("foo")
}

// Works
consume(new Consumer<String>() { void accept(String s) { println "1" } })
 
// Fails, andThen() returns null
consume({ println "1" })