Produce cached data only for scripts which compile without errors.

src/parser.cc

Index: src/parser.cc
diff --git a/src/parser.cc b/src/parser.cc
index 0ff11f2281612260d87e51467b7caca13f6d935b..f07f37ebb2b271cc6466ff2dde8af462adb0a9a7 100644
--- a/src/parser.cc
+++ b/src/parser.cc
@@ -854,8 +854,10 @@ FunctionLiteral* Parser::ParseProgram() {
     PrintF(" - took %0.3f ms]\n", ms);
   }
   if (cached_data_mode_ == PRODUCE_CACHED_DATA) {
-    Vector<unsigned> store = recorder.ExtractData();
-    *cached_data_ = new ScriptData(store);
+    if (result != NULL) {
+      Vector<unsigned> store = recorder.ExtractData();
+      *cached_data_ = new ScriptData(store);
+    }
     log_ = NULL;
   }
   return result;