Check in codegen test expectations.

test/codegen/expect/language/regress_20074_test.js

Index: test/codegen/expect/language/regress_20074_test.js
diff --git a/test/codegen/expect/language/regress_20074_test.js b/test/codegen/expect/language/regress_20074_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..7f6fa7b7ba58fa078aec57ae8eff5a5b247bbc4a
--- /dev/null
+++ b/test/codegen/expect/language/regress_20074_test.js
@@ -0,0 +1,25 @@
+dart_library.library('language/regress_20074_test', null, /* Imports */[
+  'dart_sdk'
+], function load__regress_20074_test(exports, dart_sdk) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const regress_20074_test = Object.create(null);
+  let dynamicTodynamic = () => (dynamicTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [dart.dynamic])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  regress_20074_test.doit = function() {
+    function error(error) {
+      core.print(error);
+    }
+    dart.fn(error, dynamicTodynamic());
+    error('foobar');
+  };
+  dart.fn(regress_20074_test.doit, VoidTodynamic());
+  regress_20074_test.main = function() {
+    regress_20074_test.doit();
+  };
+  dart.fn(regress_20074_test.main, VoidTodynamic());
+  // Exports:
+  exports.regress_20074_test = regress_20074_test;
+});