#![allow(warnings)] trait A { fn get(&self) -> T { panic!() } } struct B<'a, T: 'a>(&'a (A + 'a)); trait X { fn foo(&self) {} } impl<'a, T> X for B<'a, T> {} fn f<'a, T, U>(v: Box + 'static>) -> Box { // oh dear! Box::new(B(&*v)) as Box //~^ ERROR the parameter type `T` may not live long enough //~| ERROR the parameter type `T` may not live long enough //~| ERROR the parameter type `T` may not live long enough //~| ERROR the parameter type `T` may not live long enough //~| ERROR cannot return value referencing local data `*v` [E0515] } fn main() {}