| error[E0384]: cannot assign twice to immutable variable `x` | |
| --> $DIR/command-line-diagnostics.rs:6:5 | |
| | | |
| LL | let x = 42; | |
| | - first assignment to `x` | |
| LL | x = 43; | |
| | ^^^^^^ cannot assign twice to immutable variable | |
| | | |
| help: consider making this binding mutable | |
| | | |
| LL | let mut x = 42; | |
| | +++ | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0384`. |