Check in codegen test expectations.

test/codegen/expect/language/async_await_catch_regression_test.js

+dart_library.library('language/async_await_catch_regression_test', null, /* Imports */[
+  'dart_sdk',
+  'expect',
+  'async_helper'
+], function load__async_await_catch_regression_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 async_await_catch_regression_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  let dynamicTovoid = () => (dynamicTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [dart.dynamic])))();
+  async_await_catch_regression_test.foo = function() {
+    return dart.async(function*() {
+      dart.throw(42);
+    }, dart.dynamic);
+  };
+  dart.fn(async_await_catch_regression_test.foo, VoidTodynamic());
+  async_await_catch_regression_test.test = function() {
+    return dart.async(function*() {
+      let exception = null;
+      try {
+        yield async_await_catch_regression_test.foo();
+      } catch (e) {
+        core.print(yield e);
+        yield exception = (yield e);
+      }
+
+      expect$.Expect.equals(42, exception);
+    }, dart.dynamic);
+  };
+  dart.fn(async_await_catch_regression_test.test, VoidTodynamic());
+  async_await_catch_regression_test.main = function() {
+    async_helper$.asyncStart();
+    dart.dsend(async_await_catch_regression_test.test(), 'then', dart.fn(_ => async_helper$.asyncEnd(), dynamicTovoid()));
+  };
+  dart.fn(async_await_catch_regression_test.main, VoidTodynamic());
+  // Exports:
+  exports.async_await_catch_regression_test = async_await_catch_regression_test;
+});