Fix crashes in debug mode with optimizations turned off.

runtime/lib/array.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/bootstrap_natives.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/exceptions.h"
 #include "vm/native_entry.h"
 #include "vm/object.h"
 
 namespace dart {
 
 DEFINE_NATIVE_ENTRY(ObjectArray_allocate, 2) {
   const AbstractTypeArguments& type_arguments =
       AbstractTypeArguments::CheckedHandle(isolate, arguments->NativeArgAt(0));
-  ASSERT(type_arguments.IsNull() ||
-         (type_arguments.IsInstantiated() && (type_arguments.Length() == 1)));
   const Instance& length = Instance::CheckedHandle(
       isolate, arguments->NativeArgAt(1));
   if (!length.IsSmi()) {
     const String& error = String::Handle(String::NewFormatted(
         "Length must be an integer in the range [0..%"Pd"].",
         Array::kMaxElements));
     const Array& args = Array::Handle(Array::New(1));
     args.SetAt(0, error);
     Exceptions::ThrowByType(Exceptions::kArgument, args);
   }
@@ skipping 80 matching lines @@
   } else {
     for (intptr_t i = 0; i < icount; i++) {
       src_obj = source.At(isrc_start + i);
       dest.SetAt(idst_start + i, src_obj);
     }
   }
   return Object::null();
 }
 
 }  // namespace dart