rust/tests/ui/traits/next-solver/overflow/global-cache.rs

24 lines
536 B
Rust

//@ compile-flags: -Znext-solver
// Check that we consider the reached depth of global cache
// entries when detecting overflow. We would otherwise be unstable
// wrt to incremental compilation.
#![recursion_limit = "9"]
trait Trait {}
struct Inc<T>(T);
impl<T: Trait> Trait for Inc<T> {}
impl Trait for () {}
fn impls_trait<T: Trait>() {}
type Four<T> = Inc<Inc<Inc<Inc<T>>>>;
fn main() {
impls_trait::<Four<Four<()>>>();
impls_trait::<Four<Four<Four<Four<()>>>>>();
//~^ ERROR overflow evaluating the requirement
}