fix corner case in unused (#4757)

fixes #4756
2021-03-08 23:59:52 +00:00
parent f4ee0f651c
commit 01fa430a3e
3 changed files with 50 additions and 21 deletions
--- a/lib/scope.js
+++ b/lib/scope.js
@@ -438,6 +438,7 @@ AST_Scope.DEFMETHOD("init_vars", function(parent_scope) {
 });
 AST_Arrow.DEFMETHOD("init_vars", function(parent_scope) {
    init_scope_vars(this, parent_scope);
+    return this;
 });
 AST_AsyncArrow.DEFMETHOD("init_vars", function(parent_scope) {
    init_scope_vars(this, parent_scope);