t5380.scala:3: warning: a pure expression does nothing in statement position; you may be omitting necessary parentheses
    val f = () => return try { 1 } catch { case _: Throwable => 0 }
                               ^
t5380.scala:3: warning: a pure expression does nothing in statement position; you may be omitting necessary parentheses
    val f = () => return try { 1 } catch { case _: Throwable => 0 }
                                                                ^
t5380.scala:3: warning: enclosing method main has result type Unit: return value discarded
    val f = () => return try { 1 } catch { case _: Throwable => 0 }
                  ^