Error when trait bound not satisfied for function argument should point at argument

[jdm]

trait T {}

fn function<U: T>(u: U) {}

fn main() {
    function(0u32);
}

This yields:

error[E0277]: the trait bound `u32: T` is not satisfied
 --> <anon>:6:5
  |
6 |     function(0u32);
  |     ^^^^^^^^ the trait `T` is not implemented for `u32`
  |
  = note: required by `function`

error: aborting due to previous error

When there are multiple arguments, this is much less helpful than if the span pointed at the argument in question.

[estebank]

Current output:

error[E0277]: the trait bound `u32: T` is not satisfied
 --> src/main.rs:6:5
  |
6 |     function(0u32);
  |     ^^^^^^^^ the trait `T` is not implemented for `u32`
  |
note: required by `function`
 --> src/main.rs:3:1
  |
3 | fn function<U: T>(u: U) {}
  | ^^^^^^^^^^^^^^^^^^^^^^^