Error message on Windows missing "required by" hint

[Cerber-Ursi]

I've found some kind of regression in error reporting. In short, the same code compiled by nightly-2019-11-25 yields different error messages on Linux (Ubuntu) and Windows. On Ubuntu:

error[E0283]: type annotations needed: cannot resolve `_: error_mismatch::Trait`
 --> tests/fail.rs:4:13
  |
4 |     let _ = collect();
  |             ^^^^^^^
  | 
 ::: /home/runner/work/test-error-mismatch/test-error-mismatch/src/lib.rs:9:19
  |
9 | pub fn collect<T: Trait>() -> T {
  |                   ----- required by this bound in `error_mismatch::collect`

On Windows:

error[E0283]: type annotations needed: cannot resolve `_: error_mismatch::Trait`
 --> tests\fail.rs:4:13
  |
4 |     let _ = collect();
  |             ^^^^^^^

Reproduction is here: https://github.com/Cerber-Ursi/test-error-mismatch/runs/325632093 (tests are failing intentionally - in real project this is handled by trybuild).

[estebank]

CC #53081

[mibac138]

I can reproduce this on 1.43, however I can't on nightly. I think this was fixed along with #53081 in #70642?

1.43 output

error[E0283]: type annotations needed
 --> tests\fail.rs:4:13
  |
4 |     let _ = collect();
  |         -   ^^^^^^^
  |         |   |
  |         |   cannot infer type for type parameter `T` declared on the function `collect`
  |         |   help: consider specifying the type argument in the function call: `collect::<T>`
  |         consider giving this pattern a type
  |
  = note: cannot resolve `_: error_mismatch::Trait`

nightly 2020-04-27 output

error[E0283]: type annotations needed
 --> tests\fail.rs:4:13
4 |     let _ = collect();
  |         -   ^^^^^^^ cannot infer type for type parameter `T` declared on the function `collect`
  |         |
  |         consider giving this pattern a type
 ::: C:\Users\mibac\IdeaProjects\test-error-mismatch\src\lib.rs:9:19
  |
9 | pub fn collect<T: Trait>() -> T {
  |                   ----- required by this bound in `error_mismatch::collect`
  = note: cannot satisfy `_: error_mismatch::Trait`
help: consider specifying the type argument in the function call
  |
4 |     let _ = collect::<T>();
  |                    ^^^^^

[estebank]

I think that is correct @mibac138.