1 error[E0384]: cannot assign twice to immutable variable `_x` (Ast)
2 --> $DIR/immutable-arg.rs:14:5
5 | -- first assignment to `_x`
7 | ^^^^^^ cannot assign twice to immutable variable
9 error[E0384]: cannot assign to immutable argument `_x` (Mir)
10 --> $DIR/immutable-arg.rs:14:5
12 LL | fn foo(_x: u32) {
13 | -- help: make this binding mutable: `mut _x`
15 | ^^^^^^ cannot assign to immutable argument
17 error: aborting due to 2 previous errors
19 For more information about this error, try `rustc --explain E0384`.