Version 3.7.9.

src/ast.cc

Index: src/ast.cc
===================================================================
--- src/ast.cc	(revision 10035)
+++ src/ast.cc	(working copy)
@@ -710,6 +710,10 @@
   TypeInfo info = oracle->SwitchType(this);
   if (info.IsSmi()) {
     compare_type_ = SMI_ONLY;
+  } else if (info.IsSymbol()) {
+    compare_type_ = SYMBOL_ONLY;
+  } else if (info.IsNonSymbol()) {
+    compare_type_ = STRING_ONLY;
   } else if (info.IsNonPrimitive()) {
     compare_type_ = OBJECT_ONLY;
   } else {
@@ -893,9 +897,7 @@
 FOR_EACH_REG_EXP_TREE_TYPE(MAKE_TYPE_CASE)
 #undef MAKE_TYPE_CASE
 
-RegExpEmpty RegExpEmpty::kInstance;
 
-
 static Interval ListCaptureRegisters(ZoneList<RegExpTree*>* children) {
   Interval result = Interval::Empty();
   for (int i = 0; i < children->length(); i++)