#![deny(unknown_or_malformed_diagnostic_attributes)]

#[diagnostic::onunimplemented]
//~^ERROR unknown diagnostic attribute
//~^^HELP an attribute with a similar name exists
trait X{}

#[diagnostic::un_onimplemented]
//~^ERROR unknown diagnostic attribute
//~^^HELP an attribute with a similar name exists
trait Y{}

#[diagnostic::on_implemented]
//~^ERROR unknown diagnostic attribute
//~^^HELP an attribute with a similar name exists
trait Z{}

fn main(){}