Properly treat exceptions thrown while compiling.

src/compiler.cc

 // Copyright 2010 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 271 matching lines @@
     PrintF("Compiling method %s using hydrogen\n", *name->ToCString());
     HTracer::Instance()->TraceCompilation(info->function());
   }
 
   TypeFeedbackOracle oracle(
       Handle<Code>(info->shared_info()->code()),
       Handle<Context>(info->closure()->context()->global_context()));
   HGraphBuilder builder(&oracle);
   HPhase phase(HPhase::kTotal);
   HGraph* graph = builder.CreateGraph(info);
+  if (Top::has_pending_exception()) {
+    info->SetCode(Handle<Code>::null());
+    return false;
+  }
+
   if (graph != NULL && FLAG_build_lithium) {
     Handle<Code> code = graph->Compile();
     if (!code.is_null()) {
       info->SetCode(code);
       FinishOptimization(info->closure(), start);
       return true;
     }
   }
 
   // Compilation with the Hydrogen compiler failed. Keep using the
@@ skipping 299 matching lines @@
 
   // Generate the AST for the lazily compiled function.
   if (ParserApi::Parse(info)) {
     // Measure how long it takes to do the lazy compilation; only take the
     // rest of the function into account to avoid overlap with the lazy
     // parsing statistics.
     HistogramTimerScope timer(&Counters::compile_lazy);
 
     // Compile the code.
     if (!MakeCode(info)) {
-      Top::StackOverflow();
+      if (!Top::has_pending_exception()) {
+        Top::StackOverflow();
+      }
     } else {
       ASSERT(!info->code().is_null());
       Handle<Code> code = info->code();
       Handle<JSFunction> function = info->closure();
       RecordFunctionCompilation(Logger::LAZY_COMPILE_TAG,
                                 Handle<String>(shared->DebugName()),
                                 shared->start_position(),
                                 info);
 
       if (info->IsOptimizing()) {
@@ skipping 187 matching lines @@
                                       code->instruction_size()));
     }
   }
 
   GDBJIT(AddCode(name,
                  Handle<Script>(info->script()),
                  Handle<Code>(info->code())));
 }
 
 } }  // namespace v8::internal