Use the return value of vm native methods to set the return value,

vm/code_descriptors_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64)
 
 #include "vm/ast.h"
 #include "vm/assembler.h"
@@ skipping 170 matching lines @@
 }
 CODEGEN_TEST_RUN(StackmapCodegen, Smi::New(1))
 
 
 DEFINE_NATIVE_ENTRY(NativeFunc, 2) {
   GET_NATIVE_ARGUMENT(Smi, i, arguments->At(0));
   GET_NATIVE_ARGUMENT(Smi, k, arguments->At(1));
   EXPECT_EQ(10, i.Value());
   EXPECT_EQ(20, k.Value());
   Isolate::Current()->heap()->CollectAllGarbage();
+  return Object::null();
 }
 
 
 static Dart_NativeFunction native_resolver(Dart_Handle name,
                                            int argument_count) {
   return reinterpret_cast<Dart_NativeFunction>(&DN_NativeFunc);
 }
 
 
 TEST_CASE(StackmapGC) {
@@ skipping 73 matching lines @@
   GrowableArray<const Object*> arguments;
   const Array& kNoArgumentNames = Array::Handle();
   Object& result = Object::Handle();
   result = DartEntry::InvokeStatic(function_foo, arguments, kNoArgumentNames);
   EXPECT(!result.IsError());
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32 || defined(TARGET_ARCH_X64)