error: expected one of `::`, `;`, or `as`, found `{`
  --> $DIR/import-prefix-macro-1.rs:21:27
   |
LL |     ($p: path) => (use $p {S, Z}); //~ERROR expected one of `::`, `;`, or `as`, found `{`
   |                           ^ expected one of `::`, `;`, or `as` here
...
LL | import! { a::b::c }
   | ------------------- in this macro invocation

error: aborting due to previous error