//@ run-pass //@ pretty-expanded FIXME #23616 #![allow(unused_variables)] trait Bar { fn noop(&self); //~ WARN method `noop` is never used } impl Bar for u8 { fn noop(&self) {} } fn main() { let (a, b) = (&5u8 as &dyn Bar, &9u8 as &dyn Bar); let (c, d): (&dyn Bar, &dyn Bar) = (a, b); let (a, b) = (Box::new(5u8) as Box, Box::new(9u8) as Box); let (c, d): (&dyn Bar, &dyn Bar) = (&*a, &*b); let (c, d): (&dyn Bar, &dyn Bar) = (&5, &9); }