Fix --hydrogen-stats.

src/hydrogen.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 10178 matching lines @@
 }
 
 
 void HTracer::FlushToFile() {
   AppendChars(filename_, *trace_.ToCString(), trace_.length(), false);
   trace_.Reset();
 }
 
 
 void HStatistics::Initialize(CompilationInfo* info) {
+  if (info->shared_info().is_null()) return;
   source_size_ += info->shared_info()->SourceSize();
 }
 
 
 void HStatistics::Print() {
   PrintF("Timing results:\n");
   int64_t sum = 0;
   for (int i = 0; i < timing_.length(); ++i) {
     sum += timing_[i];
   }
@@ skipping 97 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify(false);  // No full verify.
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal