macro_rules! {}
//~^ ERROR cannot find macro `macro_rules` in this scope
//~| NOTE maybe you have forgotten to define a name for this `macro_rules!`
//~| put a macro name here

macro_rules!{}
//~^ ERROR cannot find macro `macro_rules` in this scope
//~| NOTE maybe you have forgotten to define a name for this `macro_rules!`
//~| put a macro name here

fn main() {}