Modifies assertion for possibly null code pointer.

runtime/vm/deopt_instructions.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 "vm/deopt_instructions.h"
 
 #include "vm/assembler.h"
 #include "vm/code_patcher.h"
 #include "vm/intermediate_language.h"
 #include "vm/locations.h"
@@ skipping 1150 matching lines @@
 }
 
 
 void DeoptInfoBuilder::AddReturnAddress(const Function& function,
                                         intptr_t deopt_id,
                                         intptr_t dest_index) {
   // Check that deopt_id exists.
   // TODO(vegorov): verify after deoptimization targets as well.
 #ifdef DEBUG
   const Code& code = Code::Handle(function.unoptimized_code());
-  ASSERT(Isolate::IsDeoptAfter(deopt_id) ||
+  // The inlined function's code pointer may be null if there is a GC during
+  // compilation.
+  // TODO(zra): See if we can avoid this check by ensuring that code is not
+  //            removed during inlining.
+  ASSERT(code.IsNull() || Isolate::IsDeoptAfter(deopt_id) ||
       (code.GetPcForDeoptId(deopt_id, PcDescriptors::kDeopt) != 0));
 #endif
   const intptr_t object_table_index = FindOrAddObjectInTable(function);
   ASSERT(dest_index == FrameSize());
   instructions_.Add(new DeoptRetAddressInstr(object_table_index, deopt_id));
 }
 
 
 void DeoptInfoBuilder::AddPcMarker(const Function& function,
                                    intptr_t dest_index) {
@@ skipping 225 matching lines @@
                           Smi* offset,
                           DeoptInfo* info,
                           Smi* reason) {
   intptr_t i = index * kEntrySize;
   *offset ^= table.At(i);
   *info ^= table.At(i + 1);
   *reason ^= table.At(i + 2);
 }
 
 }  // namespace dart