src/test/ui/existential_types/generic_type_does_not_live_long_enough.rs

#![feature(existential_type)]

fn main() {
    let y = 42;
    let x = wrong_generic(&y);
    let z: i32 = x; //~ ERROR mismatched types
}

existential type WrongGeneric<T>: 'static;
//~^ ERROR the parameter type `T` may not live long enough

fn wrong_generic<T>(t: T) -> WrongGeneric<T> {
    t
}