incorrect suggestion for `use<...>` bound that captures multiple lifetimes

[m4rch3n1ng]

Code

struct T;

impl T {
	fn iter(&self, t: &T) -> impl Iterator {
		std::iter::once((self, t))
	}
}

Current output

cargo check currently suggests

error[E0700]: hidden type for `impl std::iter::Iterator` captures lifetime that does not appear in bounds
 --> src/main.rs:5:3
  |
4 |     fn iter(&self, t: &T) -> impl Iterator {
  |             -----            ------------- opaque type defined here
  |             |
  |             hidden type `std::iter::Once<(&T, &T)>` captures the anonymous lifetime defined here
5 |         std::iter::once((self, t))
  |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
help: add a `use<...>` bound to explicitly capture `'_`
  |
4 |     fn iter(&self, t: &T) -> impl Iterator + use<'_> {
  |                                            +++++++++

if i apply that suggestion it still complains about another implicitly captured lifetime and suggests this.

help: add `'_` to the `use<...>` bound to explicitly capture it
  |
4 |     fn iter(&self, t: &T) -> impl Iterator + use<'_, '_> {
  |                                                    ++++

if i apply this suggestion the code doesn't compile either with this error

error: cannot capture parameter `'_` twice
 --> src/main.rs:8:47
  |
4 |     fn iter(&self, t: &T) -> impl Iterator + use<'_, '_> {
  |                                                  ^^  -- parameter captured again here

and it still complains about a captured lifetime that doesn't appear in the bounds with another helpful suggestion

help: add `'_` to the `use<...>` bound to explicitly capture it
  |
4 |     fn iter(&self, t: &T) -> impl Iterator + use<'_, '_, '_> {
  |                                                        ++++

Desired output

help: add a `use<...>` bound to explicitly capture the lifetimes
  |
4 |     fn iter<'a, 'b>(&'a self, t: &'b T) -> impl Iterator + use<'a, 'b> {
  |            ++++++++  +++          +++                    +++++++++++++

Rationale and extra context

No response

Other cases

No response

Rust Version

rustc 1.84.0-nightly (c1db4dc 2024-10-25)
binary: rustc
commit-hash: c1db4dc
commit-date: 2024-10-25
host: x86_64-unknown-linux-gnu
release: 1.84.0-nightly
LLVM version: 19.1.1

Anything else?

No response