I typoed the angle brackets when attempting turbofish.

fn main() { println!("{:?}", vec![1, 2, 3].into_iter().collect::<Vec<usize>>>()); }

(Playground)

I expected to see this happen: To get an error indicating that I had an extra closing
angle bracket after my turbofish, or that I had a mismatched delimiter.

Here is what happened instead:

Errors:

 Compiling playground v0.0.1 (/playground) error: field expressions may not have generic arguments --> src/lib.rs:2:55 | 2 | println!("{:?}", vec![1, 2, 3].into_iter().collect::<Vec<usize>>>()); | ^^^^^^^^^^^^^^ error: aborting due to previous error error: Could not compile `playground`. To learn more, run the command again with --verbose. 

This error message refers to the case when you attempt to use turbofish on a struct field
rather than a method or function, like struct.field::<usize>. However, this error message
is confusing to users because, if you look at the end of the collect call, there are parentheses,
and this looks like a correctly formed method call, which obscures the real error.