1 error[E0282]: type annotations needed
2 --> $DIR/issue-85586.rs:8:13
4 LL | let b = (a + 1) as usize;
5 | ^^^^^^^ cannot infer type
7 = note: type must be known at this point
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0282`.