fix weird path context state by clearing the context before we visit it

test/core/fixtures/transformation/spec.function-name/assignment/actual.js

@@ -4,5 +4,6 @@ var i = function () {
 
 var j = function () {
   ({ j } = 5);
+  ({ y: j } = 5);
   ;
 };

test/core/fixtures/transformation/spec.function-name/assignment/expected.js

@@ -4,19 +4,11 @@ var _i = function i() {
   _i = 5;
 };
 
-var j = (function (_j) {
-  function j() {
-    return _j.apply(this, arguments);
-  }
-
-  j.toString = function () {
-    return _j.toString();
-  };
-
-  return j;
-})(function () {
+var _j = function j() {
   var _ = 5;
-  j = _.j;
+  _j = _.j;
+  var _2 = 5;
+  _j = _2.y;
 
   ;
-});
+};