Lazy preparsing vs. lazy parsing fix.

src/compiler.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 771 matching lines @@
   isolate->debugger()->OnBeforeCompile(script);
 #endif
 
   ASSERT(info->is_eval() || info->is_global());
 
   bool parse_allow_lazy =
       (info->pre_parse_data() != NULL ||
        String::cast(script->source())->length() > FLAG_min_preparse_length) &&
       !DebuggerWantsEagerCompilation(info);
 
+  if (!parse_allow_lazy && info->pre_parse_data() != NULL) {
+    // We are going to parse eagerly, but we have preparse data produced by lazy
+    // preparsing. We cannot use it, since it won't contain all the symbols we
+    // need for eager parsing.
+    info->SetPreParseData(NULL);
+  }
+
   Handle<SharedFunctionInfo> result;
 
   { VMState<COMPILER> state(info->isolate());
     if (!Parser::Parse(info, parse_allow_lazy)) {
       return Handle<SharedFunctionInfo>::null();
     }
 
     FunctionLiteral* lit = info->function();
     LiveEditFunctionTracker live_edit_tracker(isolate, lit);
 
@@ skipping 499 matching lines @@
   AllowHandleDereference allow_deref;
   bool tracing_on = info()->IsStub()
       ? FLAG_trace_hydrogen_stubs
       : (FLAG_trace_hydrogen &&
          info()->closure()->PassesFilter(FLAG_trace_hydrogen_filter));
   return (tracing_on &&
       OS::StrChr(const_cast<char*>(FLAG_trace_phase), name_[0]) != NULL);
 }
 
 } }  // namespace v8::internal