diff -uNa ruby-0.51/ChangeLog ruby-0.52/ChangeLog
--- ruby-0.51/ChangeLog	Thu Oct 13 12:15:58 1994
+++ ruby-0.52/ChangeLog	Fri Oct 14 19:00:49 1994
@@ -1,3 +1,17 @@
+Fri Oct 14 13:22:18 1994  Yukihiro Matsumoto  (matz@ix-02)
+
+	* version 0.52: ……なんてこったい.
+
+	* eval.c(rb_call): returnの処理が間違っていたので, マシンによって
+	  はreturnで関数を終了するだけでなくtoplevelまでつき抜けていた.
+
+	* object.c: Builtinクラスを新設. 組み込み関数をKernelから移した.
+	  nilが組み込み関数を理解するとトラブルの元である.
+
+	* dbm.c: Dictと同様にeachが[key,value]を返すように.
+
+	* version 0.51
+
 Thu Oct 13 12:13:48 1994  Yukihiro Matsumoto  (matz@ix-02)
 
 	* eval.c(SETUP_ARGS): 付加演算子が配列でない時には配列に変換する.
@@ -26,9 +40,9 @@
 	* io.c(to_i): IOクラスのインスタンスを整数に変換するとそのファイル
 	  記述子を返すように.
 
-	* numeric.c(num2int): to_iメソッドを使って, できる限り整数に変換す
-	  る. 以前はnum2fixだけが全てのオブジェクトに対してto_iメソッドを
-	  適用していた.
+	* numeric.c(num2int): to_iメソッドを使ってできる限り整数に変換する. 
+	  以前はnum2fixだけが全てのオブジェクトに対してto_iメソッドを適用
+	  していた.
 
 	* sprintf.c(Fsprintf): 整数表示の際, オブジェクトをできる限り整数
 	  に変換するように(to_iメソッドを使う).
diff -uNa ruby-0.51/Makefile.in ruby-0.52/Makefile.in
--- ruby-0.51/Makefile.in	Thu Oct 13 17:15:05 1994
+++ ruby-0.52/Makefile.in	Fri Oct 14 15:18:59 1994
@@ -142,7 +142,7 @@
 clean:;		@rm -f $(OBJS)
 
 realclean:;	@rm -f $(OBJS)
-		@rm -f core ruby *~
+		@rm -f core ruby *~ config.status Makefile
 
 dbm.o:dbm.c
 	$(CC) -c $(DBM) $(CFLAGS) $(CPPFLAGS) $(DEFS) -I$(srcdir) -I$(srcdir)/lib dbm.c
diff -uNa ruby-0.51/ToDo ruby-0.52/ToDo
--- ruby-0.51/ToDo	Mon Oct  3 14:18:43 1994
+++ ruby-0.52/ToDo	Fri Oct 14 15:19:00 1994
@@ -1,3 +1,4 @@
+* trからBSDコードを取り除く
 * 適切なsignal handling
 * dlnのCOFF対応
 * rubyで定義する変数hookの実現
diff -uNa ruby-0.51/array.c ruby-0.52/array.c
--- ruby-0.51/array.c	Thu Oct  6 11:49:47 1994
+++ ruby-0.52/array.c	Fri Oct 14 15:19:01 1994
@@ -3,7 +3,7 @@
   array.c -
 
   $Author: matz $
-  $Date: 1994/08/12 11:06:34 $
+  $Date: 1994/10/14 06:19:01 $
   created at: Fri Aug  6 09:46:12 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
diff -uNa ruby-0.51/bignum.c ruby-0.52/bignum.c
--- ruby-0.51/bignum.c	Fri Aug 26 10:08:21 1994
+++ ruby-0.52/bignum.c	Fri Oct 14 15:19:03 1994
@@ -3,7 +3,7 @@
   bignum.c -
 
   $Author: matz $
-  $Date: 1994/08/12 04:47:06 $
+  $Date: 1994/10/14 06:19:03 $
   created at: Fri Jun 10 00:48:55 JST 1994
 
 ************************************************/
diff -uNa ruby-0.51/class.c ruby-0.52/class.c
--- ruby-0.51/class.c	Wed Oct 12 16:51:35 1994
+++ ruby-0.52/class.c	Fri Oct 14 15:19:04 1994
@@ -3,7 +3,7 @@
   class.c -
 
   $Author: matz $
-  $Date: 1994/08/12 11:06:35 $
+  $Date: 1994/10/14 06:19:04 $
   created at: Tue Aug 10 15:05:44 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
diff -uNa ruby-0.51/compar.c ruby-0.52/compar.c
--- ruby-0.51/compar.c	Wed Oct 12 00:13:49 1994
+++ ruby-0.52/compar.c	Fri Oct 14 15:19:05 1994
@@ -3,7 +3,7 @@
   compar.c -
 
   $Author: matz $
-  $Date: 1994/08/12 04:47:09 $
+  $Date: 1994/10/14 06:19:05 $
   created at: Thu Aug 26 14:39:48 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
diff -uNa ruby-0.51/dbm.c ruby-0.52/dbm.c
--- ruby-0.51/dbm.c	Mon Oct  3 10:07:58 1994
+++ ruby-0.52/dbm.c	Fri Oct 14 19:00:51 1994
@@ -3,7 +3,7 @@
   dbm.c -
 
   $Author: matz $
-  $Date: 1994/08/12 11:06:37 $
+  $Date: 1994/10/14 10:00:51 $
   created at: Mon Jan 24 15:59:52 JST 1994
 
   Copyright (C) 1994 Yukihiro Matsumoto
@@ -243,7 +243,7 @@
 }
 
 static VALUE
-Fdbm_each(obj)
+Fdbm_each_value(obj)
     VALUE obj;
 {
     datum key, val;
@@ -396,8 +396,8 @@
     rb_define_method(C_DBM, "indexes",  Fdbm_indexes, -2);
     rb_define_method(C_DBM, "length", Fdbm_length, 0);
     rb_define_alias(C_DBM,  "size", "length");
-    rb_define_method(C_DBM, "each", Fdbm_each, 0);
-    rb_define_method(C_DBM, "each_value", Fdbm_each, 0);
+    rb_define_method(C_DBM, "each", Fdbm_each_pair, 0);
+    rb_define_method(C_DBM, "each_value", Fdbm_each_value, 0);
     rb_define_method(C_DBM, "each_key", Fdbm_each_key, 0);
     rb_define_method(C_DBM, "each_pair", Fdbm_each_pair, 0);
     rb_define_method(C_DBM, "keys", Fdbm_keys, 0);
diff -uNa ruby-0.51/dict.c ruby-0.52/dict.c
--- ruby-0.51/dict.c	Tue Oct  4 10:15:56 1994
+++ ruby-0.52/dict.c	Fri Oct 14 19:00:52 1994
@@ -3,7 +3,7 @@
   dict.c -
 
   $Author: matz $
-  $Date: 1994/08/12 04:47:13 $
+  $Date: 1994/10/14 10:00:52 $
   created at: Mon Nov 22 18:51:18 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
@@ -523,7 +523,7 @@
 
 Init_Dict()
 {
-    extern VALUE C_Kernel;
+    extern VALUE C_Builtin;
     extern VALUE M_Enumerable;
     static VALUE envtbl;
 
@@ -578,6 +578,6 @@
     envtbl = obj_alloc(C_EnvDict);
     rb_define_variable("$ENV", &envtbl, Qnil, rb_readonly_hook);
 
-    rb_define_method(C_Kernel, "getenv", Fgetenv, 1);
-    rb_define_method(C_Kernel, "setenv", Fsetenv, 2);
+    rb_define_method(C_Builtin, "getenv", Fgetenv, 1);
+    rb_define_method(C_Builtin, "setenv", Fsetenv, 2);
 }
diff -uNa ruby-0.51/dir.c ruby-0.52/dir.c
--- ruby-0.51/dir.c	Thu Sep  1 10:38:45 1994
+++ ruby-0.52/dir.c	Fri Oct 14 15:19:12 1994
@@ -3,7 +3,7 @@
   dir.c -
 
   $Author: matz $
-  $Date: 1994/08/12 11:06:38 $
+  $Date: 1994/10/14 06:19:12 $
   created at: Wed Jan  5 09:51:01 JST 1994
 
   Copyright (C) 1994 Yukihiro Matsumoto
diff -uNa ruby-0.51/dln.c ruby-0.52/dln.c
--- ruby-0.51/dln.c	Mon Oct  3 12:34:27 1994
+++ ruby-0.52/dln.c	Fri Oct 14 15:19:13 1994
@@ -3,7 +3,7 @@
   dln.c -
 
   $Author: matz $
-  $Date: 1994/08/12 04:47:16 $
+  $Date: 1994/10/14 06:19:13 $
   created at: Tue Jan 18 17:05:06 JST 1994
 
   Copyright (C) 1994 Yukihiro Matsumoto
diff -uNa ruby-0.51/env.h ruby-0.52/env.h
--- ruby-0.51/env.h	Wed Oct 12 12:59:57 1994
+++ ruby-0.52/env.h	Fri Oct 14 15:19:14 1994
@@ -3,8 +3,8 @@
   env.h -
 
   $Author: matz $
-  $Revision: 1.3 $
-  $Date: 1994/08/12 11:06:39 $
+  $Revision: 1.4 $
+  $Date: 1994/10/14 06:19:14 $
   created at: Mon Jul 11 11:53:03 JST 1994
 
 ************************************************/
diff -uNa ruby-0.51/error.c ruby-0.52/error.c
--- ruby-0.51/error.c	Mon Aug 29 12:21:11 1994
+++ ruby-0.52/error.c	Fri Oct 14 15:19:16 1994
@@ -3,7 +3,7 @@
   error.c -
 
   $Author: matz $
-  $Date: 1994/08/12 04:47:21 $
+  $Date: 1994/10/14 06:19:16 $
   created at: Mon Aug  9 16:11:34 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
diff -uNa ruby-0.51/etc.c ruby-0.52/etc.c
--- ruby-0.51/etc.c	Tue Sep  6 16:41:33 1994
+++ ruby-0.52/etc.c	Fri Oct 14 15:19:17 1994
@@ -3,7 +3,7 @@
   etc.c -
 
   $Author: matz $
-  $Date: 1994/08/24 09:25:27 $
+  $Date: 1994/10/14 06:19:17 $
   created at: Tue Mar 22 18:39:19 JST 1994
 
 ************************************************/
diff -uNa ruby-0.51/eval.c ruby-0.52/eval.c
--- ruby-0.51/eval.c	Thu Oct 13 17:01:02 1994
+++ ruby-0.52/eval.c	Fri Oct 14 19:00:53 1994
@@ -3,7 +3,7 @@
   eval.c -
 
   $Author: matz $
-  $Date: 1994/08/24 09:25:28 $
+  $Date: 1994/10/14 10:00:53 $
   created at: Thu Jun 10 14:22:17 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
@@ -1139,7 +1139,9 @@
     int status;
 {
     last_val = INT2FIX(status);
-    JUMP_TAG(TAG_EXIT);
+    if (prot_tag)
+	JUMP_TAG(TAG_EXIT);
+    exit(FIX2UINT(last_val));
 }
 
 VALUE
@@ -1519,7 +1521,6 @@
     int   argc;
     ID    mid;
 {
-    int    state, go_out;
     NODE  *body;
     VALUE  result;
     VALUE  saved_self = Qself;
@@ -1655,6 +1656,8 @@
 	}
     }
     else {
+	int    state;
+
 	PUSH_ENV();
 
 	the_env->local_vars = Qnil;
@@ -1670,10 +1673,13 @@
 #endif
 
 	PUSH_TAG();
-	switch (state = EXEC_TAG()) {
-	  case 0:
+	state = EXEC_TAG();
+	if (state == 0) {
 	    result = rb_eval(body);
-	    go_out=0;
+	}
+	POP_TAG();
+	switch (state) {
+	  case 0:
 	    break;
 	  case TAG_CONTINUE:
 	    Fatal("unexpected continue");
@@ -1691,11 +1697,9 @@
 	    result = last_val;
 	    break;
 	  default:
-	    go_out=1;
+	    JUMP_TAG(state);
 	}
-	POP_TAG();
 	POP_ENV();
-	if (go_out) JUMP_TAG(state);
     }
     Qself = saved_self;
     the_env->iterator = saved_ilevel;
@@ -2004,7 +2008,7 @@
 
 Init_load()
 {
-    extern VALUE C_Kernel;
+    extern VALUE C_Builtin;
     extern VALUE rb_check_str();
     char *path;
 
@@ -2015,6 +2019,6 @@
     addpath(getenv("RUBYLIB"));
     addpath(RUBY_LIB);
 
-    rb_define_method(C_Kernel, "load", Fload, 1);
-    rb_define_method(C_Kernel, "require", Frequire, 1);
+    rb_define_method(C_Builtin, "load", Fload, 1);
+    rb_define_method(C_Builtin, "require", Frequire, 1);
 }
diff -uNa ruby-0.51/file.c ruby-0.52/file.c
--- ruby-0.51/file.c	Wed Oct  5 16:51:32 1994
+++ ruby-0.52/file.c	Fri Oct 14 15:19:20 1994
@@ -4,7 +4,7 @@
   file.c -
 
   $Author: matz $
-  $Date: 1994/08/18 07:06:21 $
+  $Date: 1994/10/14 06:19:20 $
   created at: Mon Nov 15 12:24:34 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
diff -uNa ruby-0.51/gc.c ruby-0.52/gc.c
--- ruby-0.51/gc.c	Wed Oct  5 12:55:53 1994
+++ ruby-0.52/gc.c	Fri Oct 14 15:19:22 1994
@@ -3,7 +3,7 @@
   gc.c -
 
   $Author: matz $
-  $Date: 1994/08/12 04:47:27 $
+  $Date: 1994/10/14 06:19:22 $
   created at: Tue Oct  5 09:44:46 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
diff -uNa ruby-0.51/inits.c ruby-0.52/inits.c
--- ruby-0.51/inits.c	Fri Oct  7 13:56:28 1994
+++ ruby-0.52/inits.c	Fri Oct 14 15:19:24 1994
@@ -3,7 +3,7 @@
   inits.c -
 
   $Author: matz $
-  $Date: 1994/08/19 09:32:02 $
+  $Date: 1994/10/14 06:19:24 $
   created at: Tue Dec 28 16:01:58 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
diff -uNa ruby-0.51/io.c ruby-0.52/io.c
--- ruby-0.51/io.c	Tue Oct 11 23:59:01 1994
+++ ruby-0.52/io.c	Fri Oct 14 19:00:55 1994
@@ -3,7 +3,7 @@
   io.c -
 
   $Author: matz $
-  $Date: 1994/08/12 11:06:40 $
+  $Date: 1994/10/14 10:00:55 $
   created at: Fri Oct 15 18:08:59 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
@@ -1261,26 +1261,26 @@
 
 Init_IO()
 {
-    extern VALUE C_Kernel;
+    extern VALUE C_Builtin;
 
     id_write = rb_intern("write");
     id_fd = rb_intern("fd");
     id_print_on = rb_intern("print_on");
 
-    rb_define_method(C_Kernel, "syscall", Fsyscall, -1);
+    rb_define_method(C_Builtin, "syscall", Fsyscall, -1);
 
-    rb_define_method(C_Kernel, "open", Fopen, -2);
-    rb_define_method(C_Kernel, "printf", Fprintf, -1);
-    rb_define_method(C_Kernel, "print", Fprint, -1);
-    rb_define_method(C_Kernel, "gets", Fgets, 0);
-    rb_define_alias(C_Kernel,"readline", "gets");
-    rb_define_method(C_Kernel, "eof", Feof, 0);
-    rb_define_method(C_Kernel, "getc", Fgetc, 0);
-    rb_define_method(C_Kernel, "select", Fselect, -2);
+    rb_define_method(C_Builtin, "open", Fopen, -2);
+    rb_define_method(C_Builtin, "printf", Fprintf, -1);
+    rb_define_method(C_Builtin, "print", Fprint, -1);
+    rb_define_method(C_Builtin, "gets", Fgets, 0);
+    rb_define_alias(C_Builtin,"readline", "gets");
+    rb_define_method(C_Builtin, "eof", Feof, 0);
+    rb_define_method(C_Builtin, "getc", Fgetc, 0);
+    rb_define_method(C_Builtin, "select", Fselect, -2);
 
-    rb_define_method(C_Kernel, "readlines", Freadlines, 0);
+    rb_define_method(C_Builtin, "readlines", Freadlines, 0);
 
-    rb_define_method(C_Kernel, "print_on", Fprint_on, 1);
+    rb_define_method(C_Builtin, "print_on", Fprint_on, 1);
 
     C_IO = rb_define_class("IO", C_Object);
     rb_include_module(C_IO, M_Enumerable);
diff -uNa ruby-0.51/math.c ruby-0.52/math.c
--- ruby-0.51/math.c	Mon Aug 29 11:21:10 1994
+++ ruby-0.52/math.c	Fri Oct 14 15:19:27 1994
@@ -3,7 +3,7 @@
   math.c -
 
   $Author: matz $
-  $Date: 1994/08/12 04:47:35 $
+  $Date: 1994/10/14 06:19:27 $
   created at: Tue Jan 25 14:12:56 JST 1994
 
   Copyright (C) 1994 Yukihiro Matsumoto
Common subdirectories: ruby-0.51/missing and ruby-0.52/missing
diff -uNa ruby-0.51/newver.rb ruby-0.52/newver.rb
--- ruby-0.51/newver.rb
+++ ruby-0.52/newver.rb	Wed Aug 24 15:18:05 1994
@@ -0,0 +1,19 @@
+#! /usr/local/bin/ruby
+f = open("version.h", "r")
+f.gets()
+f.close
+
+if $_ =~ /"(\d+)\.(\d+)"/;
+  f = open("version.h", "w")
+  i = $2.to_i
+  if $ARGV[0] == "-f"
+    i += 1
+  end
+  date = Time.now.strftime("%d %b %y")
+  printf("ruby version %d.%0d (%s)\n", $1, i, date)
+  printf(f, "#define RUBY_VERSION \"%d.%0d\"\n", $1, i)
+  printf(f, "#define VERSION_DATE \"%s\"\n", date)
+  f.close
+else
+  printf("match error - %s\n", $_)
+end
diff -uNa ruby-0.51/node.h ruby-0.52/node.h
--- ruby-0.51/node.h	Wed Oct 12 16:59:38 1994
+++ ruby-0.52/node.h	Fri Oct 14 15:19:30 1994
@@ -3,7 +3,7 @@
   node.h -
 
   $Author: matz $
-  $Date: 1994/08/24 09:25:29 $
+  $Date: 1994/10/14 06:19:30 $
   created at: Fri May 28 15:14:02 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
diff -uNa ruby-0.51/numeric.c ruby-0.52/numeric.c
--- ruby-0.51/numeric.c	Tue Oct 11 18:03:36 1994
+++ ruby-0.52/numeric.c	Fri Oct 14 15:19:31 1994
@@ -3,7 +3,7 @@
   numeric.c -
 
   $Author: matz $
-  $Date: 1994/08/12 04:47:41 $
+  $Date: 1994/10/14 06:19:31 $
   created at: Fri Aug 13 18:33:09 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
diff -uNa ruby-0.51/object.c ruby-0.52/object.c
--- ruby-0.51/object.c	Fri Oct  7 14:14:11 1994
+++ ruby-0.52/object.c	Fri Oct 14 19:00:56 1994
@@ -3,7 +3,7 @@
   object.c -
 
   $Author: matz $
-  $Date: 1994/08/12 04:47:42 $
+  $Date: 1994/10/14 10:00:56 $
   created at: Thu Jul 15 12:01:24 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
@@ -17,12 +17,12 @@
 #include <stdio.h>
 
 VALUE C_Kernel;
+VALUE C_Builtin;
 VALUE C_Object;
 VALUE C_Module;
 VALUE C_Class;
 VALUE C_Nil;
 VALUE C_Data;
-VALUE C_Method;
 
 struct st_table *new_idhash();
 
@@ -348,11 +348,13 @@
     VALUE metaclass;
 
     C_Kernel = boot_defclass("Kernel", Qnil);
-    C_Object = boot_defclass("Object", C_Kernel);
+    C_Builtin = boot_defclass("Builtin", C_Kernel);
+    C_Object = boot_defclass("Object", C_Builtin);
     C_Module = boot_defclass("Module", C_Object);
     C_Class =  boot_defclass("Class",  C_Module);
 
     metaclass = RBASIC(C_Kernel)->class = single_class_new(C_Class);
+    metaclass = RBASIC(C_Builtin)->class = single_class_new(metaclass);
     metaclass = RBASIC(C_Object)->class = single_class_new(metaclass);
     metaclass = RBASIC(C_Module)->class = single_class_new(metaclass);
     metaclass = RBASIC(C_Class)->class = single_class_new(metaclass);
@@ -366,10 +368,13 @@
      *  |      Kernel----->(Kernel)		    |
      *  |       ^  ^         ^  ^		    |
      *	|       |  |         |  |		    |
-     *	|   +---+  +----+    |  +---+		    |
-     *	|   |     +-----|----+      |		    |
-     *	|   |     |     |           |		    |
-     * 	+->Nil->(Nil) Object---->(Object)	    |
+     *	|   +---+  +-----+   |  +---+		    |
+     *	|   |     +------|---+      |		    |
+     *	|   |     |      |          |               |
+     * 	+->Nil->(Nil) Builtin--->(Builtin)	    |
+     *                   ^          ^		    |
+     *                   |          |		    |
+     *                Object---->(Object)	    |
      *	   	       ^ ^         ^  ^	            |
      *	   	       | |         |  |	            |
      *                 | | +-------+  |	            |
@@ -403,16 +408,16 @@
     rb_define_method(C_Kernel, "_inspect", Fkrn_inspect, 0);
 
 #ifdef USE_CALLER
-    rb_define_method(C_Kernel, "caller", Fcaller, -2);
+    rb_define_method(C_Builtin, "caller", Fcaller, -2);
 #endif
-    rb_define_method(C_Kernel, "exit", Fexit, -2);
-    rb_define_method(C_Kernel, "eval", Feval, 1);
-    rb_define_method(C_Kernel, "defined", Fdefined, 1);
-    rb_define_method(C_Kernel, "sprintf", Fsprintf, -1);
-    rb_define_alias(C_Kernel, "format", "sprintf");
-    rb_define_method(C_Kernel, "iterator_p", Fiterator_p, 0);
+    rb_define_method(C_Builtin, "exit", Fexit, -2);
+    rb_define_method(C_Builtin, "eval", Feval, 1);
+    rb_define_method(C_Builtin, "defined", Fdefined, 1);
+    rb_define_method(C_Builtin, "sprintf", Fsprintf, -1);
+    rb_define_alias(C_Builtin, "format", "sprintf");
+    rb_define_method(C_Builtin, "iterator_p", Fiterator_p, 0);
 
-    rb_define_method(C_Kernel, "apply", Fapply, -2);
+    rb_define_method(C_Builtin, "apply", Fapply, -2);
 
     rb_define_method(C_Object, "_inspect", Fobj_inspect, 0);
 
@@ -442,9 +447,6 @@
     rb_define_method(C_Data, "clone", Fcant_clone, 0);
     rb_define_method(C_Data, "class", Fdata_class, 0);
 
-    C_Method = rb_define_class("Method", C_Kernel);
-    rb_define_method(C_Method, "clone", Fcant_clone, 0);
-
     eq = rb_intern("==");
     match = rb_intern("=~");
 
@@ -453,7 +455,7 @@
 
     TRUE = obj_alloc(C_Object);
     rb_define_single_method(TRUE, "to_s", Ftrue_to_s, 0);
-    rb_define_const(C_Kernel, "%TRUE", TRUE);
-    rb_define_const(C_Kernel, "%FALSE", FALSE);
+    rb_define_const(C_Builtin, "%TRUE", TRUE);
+    rb_define_const(C_Builtin, "%FALSE", FALSE);
 }
 
diff -uNa ruby-0.51/pack.c ruby-0.52/pack.c
--- ruby-0.51/pack.c	Tue Oct  4 11:39:30 1994
+++ ruby-0.52/pack.c	Fri Oct 14 15:19:34 1994
@@ -3,7 +3,7 @@
   pack.c -
 
   $Author: matz $
-  $Date: 1994/08/12 04:47:44 $
+  $Date: 1994/10/14 06:19:34 $
   created at: Thu Feb 10 15:17:05 JST 1994
 
   Copyright (C) 1994 Yukihiro Matsumoto
diff -uNa ruby-0.51/parse.y ruby-0.52/parse.y
--- ruby-0.51/parse.y	Thu Oct 13 17:16:05 1994
+++ ruby-0.52/parse.y	Fri Oct 14 15:19:35 1994
@@ -3,7 +3,7 @@
   parse.y -
 
   $Author: matz $
-  $Date: 1994/08/25 09:21:07 $
+  $Date: 1994/10/14 06:19:35 $
   created at: Fri May 28 18:02:42 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
diff -uNa ruby-0.51/process.c ruby-0.52/process.c
--- ruby-0.51/process.c	Wed Oct 12 00:13:46 1994
+++ ruby-0.52/process.c	Fri Oct 14 19:00:58 1994
@@ -3,7 +3,7 @@
   process.c -
 
   $Author: matz $
-  $Date: 1994/08/12 04:47:47 $
+  $Date: 1994/10/14 10:00:58 $
   created at: Tue Aug 10 14:30:50 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
@@ -832,19 +832,19 @@
 
 Init_process()
 {
-    extern VALUE C_Kernel;
+    extern VALUE C_Builtin;
 
     rb_define_variable("$$", Qnil, get_pid, rb_readonly_hook);
     rb_define_variable("$?", &status, Qnil, rb_readonly_hook);
-    rb_define_method(C_Kernel, "exec", Fexec, 1);
-    rb_define_method(C_Kernel, "fork", Ffork, 0);
-    rb_define_method(C_Kernel, "_exit", Ffork, 1);
-    rb_define_method(C_Kernel, "wait", Fwait, 0);
-    rb_define_method(C_Kernel, "waitpid", Fwaitpid, 2);
-    rb_define_method(C_Kernel, "system", Fsystem, 1);
-    rb_define_method(C_Kernel, "kill", Fkill, -1);
-    rb_define_method(C_Kernel, "trap", Ftrap, -1);
-    rb_define_method(C_Kernel, "sleep", Fsleep, -1);
+    rb_define_method(C_Builtin, "exec", Fexec, 1);
+    rb_define_method(C_Builtin, "fork", Ffork, 0);
+    rb_define_method(C_Builtin, "_exit", Ffork, 1);
+    rb_define_method(C_Builtin, "wait", Fwait, 0);
+    rb_define_method(C_Builtin, "waitpid", Fwaitpid, 2);
+    rb_define_method(C_Builtin, "system", Fsystem, 1);
+    rb_define_method(C_Builtin, "kill", Fkill, -1);
+    rb_define_method(C_Builtin, "trap", Ftrap, -1);
+    rb_define_method(C_Builtin, "sleep", Fsleep, -1);
 
     M_Process = rb_define_module("Process");
 
diff -uNa ruby-0.51/random.c ruby-0.52/random.c
--- ruby-0.51/random.c	Fri Aug 12 13:47:48 1994
+++ ruby-0.52/random.c	Fri Oct 14 19:00:59 1994
@@ -3,7 +3,7 @@
   random.c -
 
   $Author: matz $
-  $Date: 1994/08/12 04:47:48 $
+  $Date: 1994/10/14 10:00:59 $
   created at: Fri Dec 24 16:39:21 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
@@ -73,8 +73,8 @@
 
 Init_Random()
 {
-    extern VALUE C_Kernel;
+    extern VALUE C_Builtin;
 
-    rb_define_method(C_Kernel, "srand", Fsrand, -2);
-    rb_define_method(C_Kernel, "rand", Frand, 1);
+    rb_define_method(C_Builtin, "srand", Fsrand, -2);
+    rb_define_method(C_Builtin, "rand", Frand, 1);
 }
diff -uNa ruby-0.51/range.c ruby-0.52/range.c
--- ruby-0.51/range.c	Fri Oct  7 14:01:33 1994
+++ ruby-0.52/range.c	Fri Oct 14 15:19:39 1994
@@ -3,7 +3,7 @@
   range.c -
 
   $Author: matz $
-  $Date: 1994/08/12 04:47:49 $
+  $Date: 1994/10/14 06:19:39 $
   created at: Thu Aug 19 17:46:47 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
diff -uNa ruby-0.51/re.c ruby-0.52/re.c
--- ruby-0.51/re.c	Tue Sep  6 18:58:29 1994
+++ ruby-0.52/re.c	Fri Oct 14 15:19:40 1994
@@ -3,7 +3,7 @@
   re.c -
 
   $Author: matz $
-  $Date: 1994/08/18 07:06:23 $
+  $Date: 1994/10/14 06:19:40 $
   created at: Mon Aug  9 18:24:49 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
diff -uNa ruby-0.51/ruby.1 ruby-0.52/ruby.1
--- ruby-0.51/ruby.1	Wed Oct  5 00:21:51 1994
+++ ruby-0.52/ruby.1	Fri Oct 14 15:19:42 1994
@@ -1,6 +1,6 @@
 .\"ruby.1 -				       -*- Nroff -*-
 .\"  $Author: matz $
-.\"  $Date: 1994/08/18 07:06:25 $
+.\"  $Date: 1994/10/14 06:19:42 $
 .\"  created at: Tue Apr 12 01:45:04 JST 1994
 .TH RUBY 1 "\*(RP"
 .UC
diff -uNa ruby-0.51/ruby.c ruby-0.52/ruby.c
--- ruby-0.51/ruby.c	Fri Sep 30 18:57:03 1994
+++ ruby-0.52/ruby.c	Fri Oct 14 15:19:43 1994
@@ -3,7 +3,7 @@
   ruby.c -
 
   $Author: matz $
-  $Date: 1994/08/24 09:25:34 $
+  $Date: 1994/10/14 06:19:43 $
   created at: Tue Aug 10 12:47:31 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
diff -uNa ruby-0.51/ruby.h ruby-0.52/ruby.h
--- ruby-0.51/ruby.h	Wed Oct  5 23:41:51 1994
+++ ruby-0.52/ruby.h	Fri Oct 14 15:19:44 1994
@@ -3,7 +3,7 @@
   ruby.h -
 
   $Author: matz $
-  $Date: 1994/08/12 11:06:43 $
+  $Date: 1994/10/14 06:19:44 $
   created at: Thu Jun 10 14:26:32 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
Common subdirectories: ruby-0.51/sample and ruby-0.52/sample
diff -uNa ruby-0.51/socket.c ruby-0.52/socket.c
--- ruby-0.51/socket.c	Tue Oct 11 17:17:44 1994
+++ ruby-0.52/socket.c	Fri Oct 14 15:19:46 1994
@@ -3,7 +3,7 @@
   socket.c -
 
   $Author: matz $
-  $Date: 1994/08/12 04:47:56 $
+  $Date: 1994/10/14 06:19:46 $
   created at: Thu Mar 31 12:21:29 JST 1994
 
 ************************************************/
diff -uNa ruby-0.51/spec ruby-0.52/spec
--- ruby-0.51/spec	Thu Oct 13 14:41:06 1994
+++ ruby-0.52/spec	Fri Oct 14 15:19:47 1994
@@ -845,10 +845,10 @@
 
 ** 関数
 
-Rubyには厳密な意味では関数はないがKernelクラスのメソッドの一部は(全ク
-ラスから関数形式で呼び出せるので), 関数的に用いられる. 関数的に用いら
-れるメソッドを以下にあげる. これらのメソッドを再定義する際には互換性を
-考えて行なうべきである.
+Rubyには厳密な意味では関数はないがBuiltinクラスのメソッドは(全ての通常
+クラスから関数形式で呼び出せるので), 関数的に用いられる. 関数的に用い
+られるメソッドを以下にあげる. これらのメソッドを再定義する際には互換性
+を考えて行なうべきである.
 
    _exit(status)
 
@@ -1431,6 +1431,17 @@
 
 	商と剰余の2要素の配列を返す.
 
+*** Builtin(クラス)
+
+全ての通常クラスのスーパークラス. Ruby組み込みの全ての関数的に呼ばれるメソッド
+はこのクラスで定義されている.
+
+SuperClass: Kernel
+
+Methods:
+
+ 「関数」の項目を参照のこと.
+
 *** Class(クラス)
 
 クラスのクラス. より厳密に説明するとクラスは特異メソッドを継承するため
@@ -2452,8 +2463,7 @@
 
 *** Kernel(クラス)
 
-全てのクラスの基底クラス. Ruby組み込みの全ての関数的に呼ばれるメソッド
-はこのクラスで定義されている.
+全てのクラスの基底クラス.
 
 SuperClass: なし
 
@@ -2663,10 +2673,11 @@
 
 *** Object(クラス)
 
-全ての通常クラスのスーパクラス. このクラスのサブクラスでないクラスは
-KernelとNilだけである.
+全ての通常クラスのスーパクラス. 通常クラスのインスタンスの一般的な振舞
+いを定義している. このクラスのサブクラスでないクラスはKernelとNilと, 
+組み込み関数を定義しているBuiltinだけである.
 
-SuperClass: Kernel
+SuperClass: Builtin
 
 Methods:
 
diff -uNa ruby-0.51/sprintf.c ruby-0.52/sprintf.c
--- ruby-0.51/sprintf.c	Tue Oct 11 17:09:57 1994
+++ ruby-0.52/sprintf.c	Fri Oct 14 15:19:50 1994
@@ -3,7 +3,7 @@
   sprintf.c -
 
   $Author: matz $
-  $Date: 1994/08/12 04:47:57 $
+  $Date: 1994/10/14 06:19:50 $
   created at: Fri Oct 15 10:39:26 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
diff -uNa ruby-0.51/string.c ruby-0.52/string.c
--- ruby-0.51/string.c	Wed Oct 12 00:22:14 1994
+++ ruby-0.52/string.c	Fri Oct 14 19:01:01 1994
@@ -3,7 +3,7 @@
   string.c -
 
   $Author: matz $
-  $Date: 1994/08/12 11:06:44 $
+  $Date: 1994/10/14 10:01:01 $
   created at: Mon Aug  9 17:12:58 JST 1993
 
   Copyright (C) 1994 Yukihiro Matsumoto
@@ -1533,7 +1533,7 @@
     }
 }
 
-extern VALUE C_Kernel;
+extern VALUE C_Builtin;
 extern VALUE M_Comparable;
 extern VALUE M_Enumerable;
 
@@ -1595,8 +1595,8 @@
 
     rb_define_method(C_String, "sum", Fstr_sum, -2);
 
-    rb_define_method(C_Kernel, "sub", Fsub, 2);
-    rb_define_method(C_Kernel, "gsub", Fgsub, 2);
+    rb_define_method(C_Builtin, "sub", Fsub, 2);
+    rb_define_method(C_Builtin, "gsub", Fgsub, 2);
 
     pr_str = rb_intern("to_s");
 }
diff -uNa ruby-0.51/version.h ruby-0.52/version.h
--- ruby-0.51/version.h	Thu Oct 13 16:59:46 1994
+++ ruby-0.52/version.h	Fri Oct 14 19:01:02 1994
@@ -1,2 +1,2 @@
-#define RUBY_VERSION "0.51"
-#define VERSION_DATE "13 Oct 94"
+#define RUBY_VERSION "0.52"
+#define VERSION_DATE "14 Oct 94"