1 error[E0423]: expected function, found macro `println`
2 --> $DIR/rustc-error.rs:LL:CC
4 LL | println("Hello, world!");
5 | ^^^^^^^ not a function
7 help: use `!` to invoke the macro
9 LL | println!("Hello, world!");
12 error: aborting due to previous error
14 For more information about this error, try `rustc --explain E0423`.