Syntactically invalid suggestion for "help: consider further restricting this bound"

[dunglas]

Hi there!

Given the following code: https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=a4dec9e7f93eb65805bcd2d986ba009e

extern crate async_trait;
extern crate reqwest;

use async_trait::async_trait;
use reqwest::{Client, IntoUrl};

#[async_trait]
pub trait ClientExt {
    async fn publish<T: IntoUrl>(&self, url: T) -> String;
}

#[async_trait]
impl ClientExt for Client {
    async fn publish<T: IntoUrl>(&self, url: T) -> String {
        "Foo".to_string()
    }
}

The current output is:

help: consider further restricting this bound
   |
14 |     async fn publish<T + std::marker::Send: IntoUrl>(&self, url: T) -> String {
   |                        +++++++++++++++++++

Ideally the output should look like:

help: consider further restricting this bound
   |
14 |     async fn publish<T: IntoUrl + std::marker::Send>(&self, url: T) -> String {
   |                                                    +++++++++++++++++++

The generated code is invalid, the restricting must be placed after the trait name.

[compiler-errors]

This was fixed in #93803