// Regression test for issue #105227.

// run-rustfix
#![allow(warnings)]
fn chars0<'a>(v :(&'a  str, &'a str)) -> impl Iterator<Item = char> + 'a  {
//~^ HELP to declare that `impl Iterator<Item = char>` captures `'_`, you can introduce a named lifetime parameter `'a`
    v.0.chars().chain(v.1.chars())
    //~^ ERROR hidden type for `impl Iterator<Item = char>` captures lifetime that does not appear in bounds
}

fn chars1<'a>(v0 : &'a  str, v1 : &'a str) -> impl Iterator<Item = char> + 'a  {
//~^ HELP to declare that `impl Iterator<Item = char>` captures `'_`, you can introduce a named lifetime parameter `'a`
    v0.chars().chain(v1.chars())
    //~^ ERROR hidden type for `impl Iterator<Item = char>` captures lifetime that does not appear in bound
}

fn chars2<'b>(v0 : &'b str, v1 : &'b str, v2 : &'b str) ->
//~^ HELP to declare that `impl Iterator<Item = char>` captures `'_`, you can use the named lifetime parameter `'b`
    (impl Iterator<Item = char> + 'b , &'b str)
{
    (v0.chars().chain(v1.chars()), v2)
    //~^ ERROR hidden type for `impl Iterator<Item = char>` captures lifetime that does not appear in bound
}

fn main() {
}