diff --git a/ChangeLog b/ChangeLog
index 93b7f079c7..6018c45ba8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Sun Jul  2 18:42:27 2006  Minero Aoki  <aamine@loveruby.net>
+
+	* ext/racc/cparse/cparse.c: sync with original source code, rev
+	  1.6.
+
+	* ext/racc/cparse/cparse.c: do not use rb_iterate to give a block
+	  to the method, use rb_block_call instead. [ruby-dev:28445]
+
 Sun Jul  2 11:22:03 2006  Tanaka Akira  <akr@m17n.org>
 
 	* io.c (io_reopen): STDOUT.reopen(filename, "w+") didn't work. 
diff --git a/ext/racc/cparse/cparse.c b/ext/racc/cparse/cparse.c
index 678d6ad374..d846f4f309 100644
--- a/ext/racc/cparse/cparse.c
+++ b/ext/racc/cparse/cparse.c
@@ -1,25 +1,23 @@
 /*
 
-    cparse.c -- racc runtime core
+    cparse.c -- Racc Runtime Core
   
-    Copyright (c) 1999-2003 Minero Aoki <aamine@loveruby.net>
+    Copyright (c) 1999-2006 Minero Aoki
   
     This library is free software.
     You can distribute/modify this program under the same terms of ruby.
 
-    $raccId: cparse.c,v 1.3 2003/11/03 12:20:54 aamine Exp $
+    $originalId: cparse.c,v 1.6 2006/07/02 09:34:14 aamine Exp $
 
 */
 
 #include "ruby.h"
-#include <stdio.h>
-
 
 /* -----------------------------------------------------------------------
                         Important Constants
 ----------------------------------------------------------------------- */
 
-#define RACC_VERSION "1.4.4"
+#define RACC_VERSION "1.4.5"
 
 #define DEFAULT_TOKEN -1
 #define ERROR_TOKEN    1
@@ -29,7 +27,6 @@
 #define vERROR_TOKEN    INT2FIX(ERROR_TOKEN)
 #define vFINAL_TOKEN    INT2FIX(FINAL_TOKEN)
 
-
 /* -----------------------------------------------------------------------
                           File Local Variables
 ----------------------------------------------------------------------- */
@@ -41,8 +38,6 @@ static ID id_yydebug;
 static ID id_nexttoken;
 static ID id_onerror;
 static ID id_noreduce;
-static ID id_catch;
-static VALUE sym_raccjump;
 static ID id_errstatus;
 
 static ID id_d_shift;
@@ -52,40 +47,39 @@ static ID id_d_read_token;
 static ID id_d_next_state;
 static ID id_d_e_pop;
 
-
 /* -----------------------------------------------------------------------
                               Utils
 ----------------------------------------------------------------------- */
 
+/* For backward compatibility */
+#ifndef ID2SYM
+# define ID2SYM(i) ULONG2NUM(i)
+#endif
+#ifndef SYM2ID
+#  define SYM2ID(v) ((ID)NUM2ULONG(v))
+#endif
+#ifndef SYMBOL_P
+#  define SYMBOL_P(v) FIXNUM_P(v)
+#endif
+#ifndef LONG2NUM
+#  define LONG2NUM(i) INT2NUM(i)
+#endif
+#if RUBY_VERSION_CODE >= 190
+#  define HAVE_RB_BLOCK_CALL 1
+#endif
+
 static ID value_to_id _((VALUE v));
 static inline long num_to_long _((VALUE n));
 
-#ifdef ID2SYM
-# define id_to_value(i) ID2SYM(i)
-#else
-# define id_to_value(i) ULONG2NUM(i)
-#endif
-
 static ID
 value_to_id(VALUE v)
 {
-#ifndef SYMBOL_P
-#  define SYMBOL_P(v) FIXNUM_P(v)
-#endif
     if (! SYMBOL_P(v)) {
         rb_raise(rb_eTypeError, "not symbol");
     }
-#ifdef SYM2ID
     return SYM2ID(v);
-#else
-    return (ID)NUM2ULONG(v);
-#endif
 }
 
-#ifndef LONG2NUM
-#  define LONG2NUM(i) INT2NUM(i)
-#endif
-
 static inline long
 num_to_long(VALUE n)
 {
@@ -95,7 +89,6 @@ num_to_long(VALUE n)
 #define AREF(s, idx) \
     ((0 <= idx && idx < RARRAY(s)->len) ? RARRAY(s)->ptr[idx] : Qnil)
 
-
 /* -----------------------------------------------------------------------
                         Parser Stack Interfaces
 ----------------------------------------------------------------------- */
@@ -129,7 +122,6 @@ cut_stack_tail(VALUE stack, long len)
 #define GET_TAIL(s, len) get_stack_tail(s, len)
 #define CUT_TAIL(s, len) cut_stack_tail(s, len)
 
-
 /* -----------------------------------------------------------------------
                        struct cparse_params
 ----------------------------------------------------------------------- */
@@ -187,7 +179,6 @@ struct cparse_params {
     long i;                 /* table index */
 };
 
-
 /* -----------------------------------------------------------------------
                         Parser Main Routines
 ----------------------------------------------------------------------- */
@@ -213,7 +204,6 @@ static void extract_user_token _((struct cparse_params *v,
                                   VALUE block_args, VALUE *tok, VALUE *val));
 static void shift _((struct cparse_params* v, long act, VALUE tok, VALUE val));
 static int reduce _((struct cparse_params* v, long act));
-static VALUE catch_iter _((VALUE dummy));
 static VALUE reduce0 _((VALUE block_args, VALUE data, VALUE self));
 
 #ifdef DEBUG
@@ -260,12 +250,13 @@ racc_yyparse(VALUE parser, VALUE lexer, VALUE lexmid, VALUE arg, VALUE sysdebug)
     return v->retval;
 }
 
+#ifdef HAVE_RB_BLOCK_CALL
 static void
 call_lexer(struct cparse_params *v)
 {
-    rb_iterate(lexer_iter, v->value_v, lexer_i, v->value_v);
+    rb_block_call(v->lexer, v->lexmid, 0, NULL, lexer_i, v->value_v);
 }
-
+#else
 static VALUE
 lexer_iter(VALUE data)
 {
@@ -276,6 +267,13 @@ lexer_iter(VALUE data)
     return Qnil;
 }
 
+static void
+call_lexer(struct cparse_params *v)
+{
+    rb_iterate(lexer_iter, v->value_v, lexer_i, v->value_v);
+}
+#endif
+
 static VALUE
 lexer_i(VALUE block_args, VALUE data, VALUE self)
 {
@@ -313,7 +311,8 @@ assert_integer(VALUE n)
 }
 
 static void
-initialize_params(struct cparse_params *v, VALUE parser, VALUE arg, VALUE lexer, VALUE lexmid)
+initialize_params(struct cparse_params *v,
+                  VALUE parser, VALUE arg, VALUE lexer, VALUE lexmid)
 {
     v->value_v = Data_Wrap_Struct(CparseParams, 0, 0, v);
 
@@ -364,7 +363,8 @@ initialize_params(struct cparse_params *v, VALUE parser, VALUE arg, VALUE lexer,
 }
 
 static void
-extract_user_token(struct cparse_params *v, VALUE block_args, VALUE *tok, VALUE *val)
+extract_user_token(struct cparse_params *v, VALUE block_args,
+                   VALUE *tok, VALUE *val)
 {
     if (NIL_P(block_args)) {
         /* EOF */
@@ -631,17 +631,11 @@ reduce(struct cparse_params *v, long act)
 {
     VALUE code;
     v->ruleno = -act * 3;
-    code = rb_iterate(catch_iter, Qnil, reduce0, v->value_v);
+    code = rb_catch("racc_jump", reduce0, v->value_v);
     v->errstatus = num_to_long(rb_ivar_get(v->parser, id_errstatus));
     return NUM2INT(code);
 }
 
-static VALUE
-catch_iter(VALUE dummy)
-{
-    return rb_funcall(rb_mKernel, id_catch, 1, sym_raccjump);
-}
-
 static VALUE
 reduce0(VALUE val, VALUE data, VALUE self)
 {
@@ -649,7 +643,7 @@ reduce0(VALUE val, VALUE data, VALUE self)
     VALUE reduce_to, reduce_len, method_id;
     long len;
     ID mid;
-    VALUE tmp, tmp_t, tmp_v;
+    VALUE tmp, tmp_t = Qundef, tmp_v = Qundef;
     long i, k1, k2;
     VALUE goto_state;
 
@@ -748,13 +742,12 @@ reduce0(VALUE val, VALUE data, VALUE self)
     goto transit;
 }
 
-
 /* -----------------------------------------------------------------------
                           Ruby Interface
 ----------------------------------------------------------------------- */
 
 void
-Init_cparse()
+Init_cparse(void)
 {
     VALUE Racc, Parser;
     ID id_racc = rb_intern("Racc");
@@ -772,7 +765,7 @@ Init_cparse()
     rb_define_const(Parser, "Racc_Runtime_Core_Version_C",
                     rb_str_new2(RACC_VERSION));
     rb_define_const(Parser, "Racc_Runtime_Core_Id_C",
-        rb_str_new2("$raccId: cparse.c,v 1.3 2003/11/03 12:20:54 aamine Exp $"));
+        rb_str_new2("$originalId: cparse.c,v 1.6 2006/07/02 09:34:14 aamine Exp $"));
 
     CparseParams = rb_define_class_under(Racc, "CparseParams", rb_cObject);
 
@@ -782,9 +775,7 @@ Init_cparse()
     id_nexttoken    = rb_intern("next_token");
     id_onerror      = rb_intern("on_error");
     id_noreduce     = rb_intern("_reduce_none");
-    id_catch        = rb_intern("catch");
     id_errstatus    = rb_intern("@racc_error_status");
-    sym_raccjump    = id_to_value(rb_intern("racc_jump"));
 
     id_d_shift       = rb_intern("racc_shift");
     id_d_reduce      = rb_intern("racc_reduce");