2 files changed, 9 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index bef9e85389..85f0377b73 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Tue Jan 27 03:43:34 2009  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* hash.c (rb_any_hash): fixed performance issues with nil, true,
+	  false as hash keys.  a patch from Matthias Waechter.  
+	  [ruby-core:21568]
+
 Tue Jan 27 03:23:43 2009  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* lib/mkmf.rb (create_makefile): should point correct path to
diff --git a/hash.c b/hash.c
index 7203d8c4e9..bfd3fe7f61 100644
--- a/hash.c
+++ b/hash.c
@@ -69,6 +69,9 @@ rb_any_hash(VALUE a)
     switch (TYPE(a)) {
       case T_FIXNUM:
       case T_SYMBOL:
+      case T_NIL:
+      case T_FALSE:
+      case T_TRUE:
 	hnum = (int)a;
 	break;