[vm] Change TypedData_getUint64 native method to silently cast values

runtime/vm/dart_api_impl.cc

 // Copyright (c) 2013, 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 "include/dart_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "lib/stacktrace.h"
 #include "platform/assert.h"
@@ skipping 2072 matching lines @@
   // Slow path for Mints and Bigints.
   DARTSCOPE(thread);
   CHECK_CALLBACK_STATE(thread);
   return Api::NewHandle(thread, Integer::New(value));
 }
 
 DART_EXPORT Dart_Handle Dart_NewIntegerFromUint64(uint64_t value) {
   DARTSCOPE(Thread::Current());
   CHECK_CALLBACK_STATE(T);
   API_TIMELINE_DURATION;
-  RawInteger* integer = Integer::NewFromUint64(value);
-  if (integer == Integer::null()) {
-    return Api::NewError("%s: Cannot create Dart integer from value %" Pu64,
-                         CURRENT_FUNC, value);
+  if (Integer::IsValidUint64(value)) {
+    return Api::NewHandle(T, Integer::NewFromUint64(value));
   }
-  return Api::NewHandle(T, integer);
+  return Api::NewError("%s: Cannot create Dart integer from value %" Pu64,
+                       CURRENT_FUNC, value);
 }
 
 DART_EXPORT Dart_Handle Dart_NewIntegerFromHexCString(const char* str) {
   DARTSCOPE(Thread::Current());
   CHECK_CALLBACK_STATE(T);
   API_TIMELINE_DURATION;
   const String& str_obj = String::Handle(Z, String::New(str));
   RawInteger* integer = Integer::New(str_obj);
   if (integer == Integer::null()) {
     return Api::NewError("%s: Cannot create Dart integer from string %s",
@@ skipping 4637 matching lines @@
 #endif
 }
 
 DART_EXPORT void Dart_DumpNativeStackTrace(void* context) {
 #ifndef PRODUCT
   Profiler::DumpStackTrace(context);
 #endif
 }
 
 }  // namespace dart