Deal with missing deopt_table under precompilation.

runtime/vm/object.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 "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 13038 matching lines @@
 }
 
 
 RawTypedData* Code::GetDeoptInfoAtPc(uword pc,
                                      ICData::DeoptReasonId* deopt_reason,
                                      uint32_t* deopt_flags) const {
   ASSERT(is_optimized());
   const Instructions& instrs = Instructions::Handle(instructions());
   uword code_entry = instrs.EntryPoint();
   const Array& table = Array::Handle(deopt_info_array());
-  ASSERT(!table.IsNull());
+  if (table.IsNull()) {
+    ASSERT(Dart::IsRunningPrecompiledCode());
+    return TypedData::null();
+  }
   // Linear search for the PC offset matching the target PC.
   intptr_t length = DeoptTable::GetLength(table);
   Smi& offset = Smi::Handle();
   Smi& reason_and_flags = Smi::Handle();
   TypedData& info = TypedData::Handle();
   for (intptr_t i = 0; i < length; ++i) {
     DeoptTable::GetEntry(table, i, &offset, &info, &reason_and_flags);
     if (pc == (code_entry + offset.Value())) {
       ASSERT(!info.IsNull());
       *deopt_reason = DeoptTable::ReasonField::decode(reason_and_flags.Value());
@@ skipping 8825 matching lines @@
   return tag_label.ToCString();
 }
 
 
 void UserTag::PrintJSONImpl(JSONStream* stream, bool ref) const {
   Instance::PrintJSONImpl(stream, ref);
 }
 
 
 }  // namespace dart