Rollup merge of #59423 - varkor:walk_mac-visit_path, r=petrochenkov

Visit path in `walk_mac`

Fixes #54110.

Author: Centril

src/libsyntax/visit.rs

@@ -647,8 +647,8 @@ pub fn walk_stmt<'a, V: Visitor<'a>>(visitor: &mut V, statement: &'a Stmt) {
     }
 }
 
-pub fn walk_mac<'a, V: Visitor<'a>>(_: &mut V, _: &Mac) {
-    // Empty!
+pub fn walk_mac<'a, V: Visitor<'a>>(visitor: &mut V, mac: &'a Mac) {
+    visitor.visit_path(&mac.node.path, DUMMY_NODE_ID);
 }
 
 pub fn walk_anon_const<'a, V: Visitor<'a>>(visitor: &mut V, constant: &'a AnonConst) {

src/libsyntax_ext/proc_macro_decls.rs

@@ -317,7 +317,7 @@ impl<'a> Visitor<'a> for CollectProcMacros<'a> {
         self.in_root = prev_in_root;
     }
 
-    fn visit_mac(&mut self, mac: &ast::Mac) {
+    fn visit_mac(&mut self, mac: &'a ast::Mac) {
         visit::walk_mac(self, mac)
     }
 }