rust/tests/ui/lang-items/issue-83471.rs

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// Regression test for the ICE reported in issue #83471.
#![crate_type="lib"]
#![feature(no_core)]
#![no_core]
#[lang = "sized"]
//~^ ERROR: lang items are subject to change [E0658]
trait Sized {}
#[lang = "fn"]
//~^ ERROR: lang items are subject to change [E0658]
//~| ERROR: `fn` lang item must be applied to a trait with 1 generic argument
trait Fn {
fn call(export_name);
//~^ ERROR: expected type
//~| WARNING: anonymous parameters are deprecated
//~| WARNING: this is accepted in the current edition
}
fn call_through_fn_trait() {
a()
//~^ ERROR: cannot find function
}