Fixed SEGV that could happen if an exception is thrown during bootstrapping.

src/bootstrapper.cc

 // Copyright 2014 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 "src/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/base/utils/random-number-generator.h"
 #include "src/code-stubs.h"
@@ skipping 1477 matching lines @@
   StackLimitCheck check(isolate);
   if (check.HasOverflowed()) return false;
 
   Handle<Context> context(isolate->context());
 
   Handle<String> script_name =
       isolate->factory()->NewStringFromUtf8(name).ToHandleChecked();
   Handle<SharedFunctionInfo> function_info = Compiler::CompileScript(
       source, script_name, 0, 0, false, false, Handle<Object>(), context, NULL,
       NULL, ScriptCompiler::kNoCompileOptions, NATIVES_CODE, false);
+  if (function_info.is_null()) return false;
 
   DCHECK(context->IsNativeContext());
 
   Handle<Context> runtime_context(context->runtime_context());
   Handle<JSBuiltinsObject> receiver(context->builtins());
   Handle<JSFunction> fun =
       isolate->factory()->NewFunctionFromSharedFunctionInfo(function_info,
                                                             runtime_context);
 
   // For non-extension scripts, run script to get the function wrapper.
@@ skipping 1527 matching lines @@
   return from + sizeof(NestingCounterType);
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 } }  // namespace v8::internal