fix corner case in arguments (#4293)

fixes #4291
2020-11-18 00:54:58 +00:00
parent 0bedd031da
commit aff842f2f9
3 changed files with 27 additions and 2 deletions
--- a/lib/scope.js
+++ b/lib/scope.js
@@ -235,7 +235,11 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options) {
            if (!sym) {
                sym = self.def_global(node);
            } else if (name == "arguments" && sym.scope instanceof AST_Lambda) {
-                sym.scope.uses_arguments = true;
+                if (!(tw.parent() instanceof AST_PropAccess)) {
+                    sym.scope.uses_arguments = "d";
+                } else if (!sym.scope.uses_arguments) {
+                    sym.scope.uses_arguments = true;
+                }
            }
            if (name == "eval") {
                var parent = tw.parent();