error: macro rhs must be delimited
  --> $DIR/macro-error.rs:2:18
   |
LL |     ($a:expr) => a;
   |                  ^

error: non-type macro in type position: cfg
  --> $DIR/macro-error.rs:8:12
   |
LL |     let _: cfg!(FALSE) = ();
   |            ^^^^^^^^^^^

error: aborting due to 2 previous errors