fix corner case in reduce_vars (#4189)

fixes #4188
2020-10-07 15:01:39 +01:00
parent bc6e105174
commit 9c0feb69e5
3 changed files with 80 additions and 18 deletions
--- a/lib/scope.js
+++ b/lib/scope.js
@@ -196,7 +196,7 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options) {
            var sym = node.scope.find_variable(name);
            if (!sym) {
                sym = self.def_global(node);
-            } else if (sym.scope instanceof AST_Lambda && name == "arguments") {
+            } else if (name == "arguments" && sym.scope instanceof AST_Lambda) {
                sym.scope.uses_arguments = true;
            }
            if (name == "eval") {