1 error[E0308]: mismatched types
2 --> $DIR/issue-40749.rs:2:9
5 | ^^^^ expected `usize`, found struct `RangeTo`
7 = note: expected type `usize`
8 found struct `RangeTo<{integer}>`
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0308`.