Check in codegen test expectations.

test/codegen/expect/language/list_tracer_closure_test.js

Index: test/codegen/expect/language/list_tracer_closure_test.js
diff --git a/test/codegen/expect/language/list_tracer_closure_test.js b/test/codegen/expect/language/list_tracer_closure_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..5c6f73e3ac35b3a1373cc9669d4d2cabae4c94ca
--- /dev/null
+++ b/test/codegen/expect/language/list_tracer_closure_test.js
@@ -0,0 +1,24 @@
+dart_library.library('language/list_tracer_closure_test', null, /* Imports */[
+  'dart_sdk'
+], function load__list_tracer_closure_test(exports, dart_sdk) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const list_tracer_closure_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  list_tracer_closure_test.main = function() {
+    let a = core.List.new();
+    dart.bind(a, dartx.add);
+    let b = core.List.new();
+    let c = core.List.new(1);
+    b[dartx.add](c);
+    dart.dsetindex(b[dartx.get](0), 0, 42);
+    if (!(typeof c[dartx.get](0) == 'number')) {
+      dart.throw('Test failed');
+    }
+  };
+  dart.fn(list_tracer_closure_test.main, VoidTodynamic());
+  // Exports:
+  exports.list_tracer_closure_test = list_tracer_closure_test;
+});