[Interpreter] Silence runtime errors in generate-bytecode-expectations.

test/cctest/interpreter/generate-bytecode-expectations.cc

Index: test/cctest/interpreter/generate-bytecode-expectations.cc
diff --git a/test/cctest/interpreter/generate-bytecode-expectations.cc b/test/cctest/interpreter/generate-bytecode-expectations.cc
index 0c9874020bdb5a2a138348941591c7c7695839e3..a45688eda9c8992398578156607fae0e88584bd4 100644
--- a/test/cctest/interpreter/generate-bytecode-expectations.cc
+++ b/test/cctest/interpreter/generate-bytecode-expectations.cc
@@ -484,6 +484,12 @@ bool WriteExpectationsFile(const std::vector<std::string>& snippet_list,
   return true;
 }
 
+void PrintMessage(v8::Local<v8::Message> message, v8::Local<v8::Value>) {
+  std::cerr << "INFO: " << *v8::String::Utf8Value(message->Get()) << '\n';
+}
+
+void DiscardMessage(v8::Local<v8::Message>, v8::Local<v8::Value>) {}
+
 void PrintUsage(const char* exec_path) {
   std::cerr
       << "\nUsage: " << exec_path
@@ -528,6 +534,9 @@ int main(int argc, char** argv) {
   }
 
   V8InitializationScope platform(argv[0]);
+  platform.isolate()->AddMessageListener(
+      options.rebaseline() && !options.verbose() ? PrintMessage

[rmcilroy, 2016/02/26 16:57:58]

Could you pull the "options.rebaseline() && !options.verbose()" into a local
variable to make this a bit more readable.

[Stefano Sanfilippo, 2016/02/26 17:01:06]

Done.

+                                                 : DiscardMessage);
 
   std::vector<std::string> snippet_list;