If map became unstable, abort compilation and allow re-compilation.

src/compiler.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "v8.h"
 
 #include "compiler.h"
 
 #include "bootstrapper.h"
 #include "codegen.h"
@@ skipping 438 matching lines @@
     ASSERT(graph_ != NULL);
     // Deferred handles reference objects that were accessible during
     // graph creation.  To make sure that we don't encounter inconsistencies
     // between graph creation and code generation, we disallow accessing
     // objects through deferred handles during the latter, with exceptions.
     DisallowDeferredHandleDereference no_deferred_handle_deref;
     Handle<Code> optimized_code = chunk_->Codegen();
     if (optimized_code.is_null()) {
       if (info()->bailout_reason() == kNoReason) {
         info_->set_bailout_reason(kCodeGenerationFailed);
+      } else if (info()->bailout_reason() == kMapBecameUnstable) {
+        return AbortOptimization();
       }
       return AbortAndDisableOptimization();
     }
     info()->SetCode(optimized_code);
   }
   RecordOptimizationStats();
   // Add to the weak list of optimized code objects.
   info()->context()->native_context()->AddOptimizedCode(*info()->code());
   return SetLastStatus(SUCCEEDED);
 }
@@ skipping 816 matching lines @@
   AllowHandleDereference allow_deref;
   bool tracing_on = info()->IsStub()
       ? FLAG_trace_hydrogen_stubs
       : (FLAG_trace_hydrogen &&
          info()->closure()->PassesFilter(FLAG_trace_hydrogen_filter));
   return (tracing_on &&
       OS::StrChr(const_cast<char*>(FLAG_trace_phase), name_[0]) != NULL);
 }
 
 } }  // namespace v8::internal