1 #![feature(generic_associated_types)]
2 //~^ WARNING: the feature `generic_associated_types` is incomplete
9 fn _f(arg : Box<dyn for<'a> X<Y<'x> = &'a [u32]>>) {}
10 //~^ ERROR: use of undeclared lifetime name `'x`
11 //~| ERROR: binding for associated type `Y` references lifetime