Check in codegen test expectations.

test/codegen/expect/language/regress_22858_test.js

Index: test/codegen/expect/language/regress_22858_test.js
diff --git a/test/codegen/expect/language/regress_22858_test.js b/test/codegen/expect/language/regress_22858_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..5acb52b9a232c2f395f6c0d6c6bacb49da30ff42
--- /dev/null
+++ b/test/codegen/expect/language/regress_22858_test.js
@@ -0,0 +1,38 @@
+dart_library.library('language/regress_22858_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__regress_22858_test(exports, dart_sdk, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const regress_22858_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  regress_22858_test.main = function() {
+    let good = "good";
+    function f1() {
+      {
+        let bad = "bad";
+        function f2() {
+          bad;
+        }
+        dart.fn(f2, VoidTodynamic());
+      }
+      expect$.Expect.equals("good", good);
+      do {
+        expect$.Expect.equals("good", good);
+        let ugly = 0;
+        function f3() {
+          ugly;
+        }
+        dart.fn(f3, VoidTodynamic());
+      } while (false);
+    }
+    dart.fn(f1, VoidTodynamic());
+    f1();
+  };
+  dart.fn(regress_22858_test.main, VoidTodynamic());
+  // Exports:
+  exports.regress_22858_test = regress_22858_test;
+});