fix corner case in functions (#5037)

fixes #5036
2021-06-24 20:43:52 +01:00
parent 1a064b6e74
commit 7621527a5f
2 changed files with 28 additions and 5 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -6574,12 +6574,10 @@ merge(Compressor.prototype, {
                        return all(def.references, function(ref) {
                            var scope = ref.scope;
                            if (scope.find_variable(name) !== sym) return false;
-                            if (forbidden) {
+                            if (forbidden) do {
                                scope = scope.resolve();
-                                do {
-                                    if (forbidden(scope)) return false;
-                                } while ((scope = scope.parent_scope.resolve()) && scope !== fn);
-                            }
+                                if (forbidden(scope)) return false;
+                            } while (scope !== fn && (scope = scope.parent_scope));
                            return true;
                        }) && def;
                    }