Unrecognized EOF found at 12
Expected one of "!", "(", "-", "false", "for", "if", "let", "print", "return", "true", "while", "{", "}", r#"\"(\\\\.|[^\"\\\\])*\""#, r#"[+-]?[0-9]+[.][0-9]*"#, r#"[0-9]+"# or r#"[a-zA-Z][a-zA-Z0-9_]*"#