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#![feature(generic_const_items)]
#![allow(incomplete_features)]
// Check that we emit a *hard* error (not just a lint warning or error for example) for generic
// parameter defaults on free const items since we are not limited by backward compatibility.
#![allow(invalid_type_param_default)] // Should have no effect here.
// FIXME(default_type_parameter_fallback): Consider reallowing them once they work properly.
const NONE<T = ()>: Option<T> = None::<T>; //~ ERROR defaults for type parameters are only allowed
fn main() {
let _ = NONE;
}
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