1 // `/**/` was previously regarded as a doc comment because it starts with `/**` and ends with `*/`.
2 // This could break some internal logic that assumes the length of a doc comment is at least 5,
5 macro_rules! one_arg_macro {
6 ($fmt:expr) => (print!(concat!($fmt, "\n")));
10 one_arg_macro!(/**/); //~ ERROR unexpected end