Check in codegen test expectations.

test/codegen/expect/language/regress_22777_test.js

+dart_library.library('language/regress_22777_test', null, /* Imports */[
+  'dart_sdk',
+  'expect',
+  'async_helper'
+], function load__regress_22777_test(exports, dart_sdk, expect, async_helper) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const async_helper$ = async_helper.async_helper;
+  const regress_22777_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  let dynamicTovoid = () => (dynamicTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [dart.dynamic])))();
+  regress_22777_test.a = 0;
+  regress_22777_test.testSync = function() {
+    do {
+      continue;
+    } while (dart.test(dart.throw("Error")));
+    regress_22777_test.a = 100;
+  };
+  dart.fn(regress_22777_test.testSync, VoidTodynamic());
+  regress_22777_test.testAsync = function() {
+    return dart.async(function*() {
+      do {
+        continue;
+      } while (dart.test(yield dart.throw("Error")));
+      regress_22777_test.a = 100;
+    }, dart.dynamic);
+  };
+  dart.fn(regress_22777_test.testAsync, VoidTodynamic());
+  regress_22777_test.test = function() {
+    return dart.async(function*() {
+      try {
+        regress_22777_test.testSync();
+      } catch (e) {
+        expect$.Expect.equals(e, "Error");
+      }
+
+      expect$.Expect.equals(regress_22777_test.a, 0);
+      try {
+        yield regress_22777_test.testAsync();
+      } catch (e) {
+        expect$.Expect.equals(e, "Error");
+      }
+
+      expect$.Expect.equals(regress_22777_test.a, 0);
+    }, dart.dynamic);
+  };
+  dart.fn(regress_22777_test.test, VoidTodynamic());
+  regress_22777_test.main = function() {
+    async_helper$.asyncStart();
+    dart.dsend(regress_22777_test.test(), 'then', dart.fn(_ => async_helper$.asyncEnd(), dynamicTovoid()));
+  };
+  dart.fn(regress_22777_test.main, VoidTodynamic());
+  // Exports:
+  exports.regress_22777_test = regress_22777_test;
+});