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//@ revisions: current next
//@ ignore-compare-mode-next-solver (explicit revisions)
//@[next] compile-flags: -Znext-solver
//@ reference: attributes.diagnostic.do_not_recommend.intro
trait Root {}
trait DontRecommend {}
trait Other {}
trait Child {}
#[diagnostic::do_not_recommend]
impl<T> Root for T where T: DontRecommend {}
impl<T> DontRecommend for T where T: Other {}
#[diagnostic::do_not_recommend]
impl<T> Other for T where T: Child {}
fn needs_root<T: Root>() {}
fn main() {
needs_root::<()>();
//~^ ERROR the trait bound `(): Root` is not satisfied
}
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