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//@ compile-flags: -Znext-solver
trait Foo {
type Assoc;
}
trait Bar {}
impl<T> Foo for T {
type Assoc = i32;
}
impl<T> Bar for T where T: Foo<Assoc = i32> {}
fn require_bar<T: Bar>() {}
fn foo<T: Foo>() {
// Unlike the classic solver, the new solver previously projected
// `<T as Foo>::Assoc = _` down to `i32` even though there's a param-env
// candidate here, since we don't assemble any param-env projection
// candidates for `T: Foo` alone.
//
// However, allowing impl candidates shadowed by env candidates results
// in multiple issues, so we explicitly hide them, e.g.
//
// https://github.com/rust-lang/trait-system-refactor-initiative/issues/76
require_bar::<T>();
//~^ ERROR type mismatch resolving `<T as Foo>::Assoc == i32`
}
fn main() {}
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