handle TCO for calls that exceed the functions parameter count - fixes #1589

test/core/fixtures/transformation/es6.tail-call/max-args/actual.js

@@ -0,0 +1,9 @@
+var count = (i = 10) => {
+  if (!i) return;
+  return count(i - 1);
+};
+
+function count2(i = 10) {
+  if (!i) return;
+  return count2(i - 1);
+}

test/core/fixtures/transformation/es6.tail-call/max-args/expected.js

@@ -0,0 +1,33 @@
+"use strict";
+
+var count = function count() {
+  var _arguments = arguments;
+  var _again = true;
+
+  _function: while (_again) {
+    i = undefined;
+    _again = false;
+    var i = _arguments[0] === undefined ? 10 : _arguments[0];
+
+    if (!i) return;
+    _arguments = [i - 1];
+    _again = true;
+    continue _function;
+  }
+};
+
+function count2() {
+  var _arguments2 = arguments;
+  var _again2 = true;
+
+  _function2: while (_again2) {
+    i = undefined;
+    _again2 = false;
+    var i = _arguments2[0] === undefined ? 10 : _arguments2[0];
+
+    if (!i) return;
+    _arguments2 = [i - 1];
+    _again2 = true;
+    continue _function2;
+  }
+}