Fix bug in collector.

src/preparser.cc

Index: src/preparser.cc
diff --git a/src/preparser.cc b/src/preparser.cc
index 310aeacfb9a1f40e293c89a15f435c8521f7639d..47d21bac15e8a253829eeddc5a582258618ecd7e 100644
--- a/src/preparser.cc
+++ b/src/preparser.cc
@@ -1557,7 +1557,7 @@ int DuplicateFinder::AddSymbol(i::Vector<const byte> key,
                                int value) {
   uint32_t hash = Hash(key, is_ascii);
   byte* encoding = BackupKey(key, is_ascii);
-  i::HashMap::Entry* entry = map_->Lookup(encoding, hash, true);
+  i::HashMap::Entry* entry = map_.Lookup(encoding, hash, true);
   int old_value = static_cast<int>(reinterpret_cast<intptr_t>(entry->value));
   entry->value =
     reinterpret_cast<void*>(static_cast<intptr_t>(value | old_value));
@@ -1584,7 +1584,8 @@ int DuplicateFinder::AddNumber(i::Vector<const char> key, int value) {
                              i::Vector<char>(number_buffer_, kBufferSize));
     length = i::StrLength(string);
   }
-  return AddAsciiSymbol(i::Vector<const char>(string, length), value);
+  return AddSymbol(i::Vector<const byte>(reinterpret_cast<const byte*>(string),
+                                         length), true, value);
 }