This feature is stable, we shouldn't suggest it any more! Instead suggest the
real feature, `use_extern_macros`.
attr::mark_known(attr);
let msg = "attribute procedural macros are experimental";
attr::mark_known(attr);
let msg = "attribute procedural macros are experimental";
- let feature = "proc_macro";
+ let feature = "use_extern_macros";
feature_err(&self.session.parse_sess, feature,
attr.span, GateIssue::Language, msg)
feature_err(&self.session.parse_sess, feature,
attr.span, GateIssue::Language, msg)