retain binding values on iteration if reassigned - fixes #1078

test/core/fixtures/transformation/es6.block-scoping-exec/for-continuation.js

@@ -0,0 +1,12 @@
+var fns = [];
+
+for (let i = 0; i < 10; i++) {
+  fns.push(function () { return i; });
+  i += 1;
+}
+
+assert.equal(fns[0](), 1);
+assert.equal(fns[1](), 3);
+assert.equal(fns[2](), 5);
+assert.equal(fns[3](), 7);
+assert.equal(fns[4](), 9);

test/core/fixtures/transformation/es6.block-scoping/for-continuation/actual.js

@@ -0,0 +1,5 @@
+for (let i = 0; i < 2; i++) {
+  () => { i };
+  console.log(i);
+  i += 1;
+}

test/core/fixtures/transformation/es6.block-scoping/for-continuation/expected.js

@@ -0,0 +1,12 @@
+"use strict";
+
+for (var i = 0; i < 2; i++) {
+  (function (_i) {
+    (function () {
+      _i;
+    });
+    console.log(_i);
+    _i += 1;
+    i = _i;
+  })(i);
+}