diff --git a/ChangeLog b/ChangeLog
index 0474f92093..8dd2cac35e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+Wed Oct 20 01:37:18 2004  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* array.c (rb_ary_times): Array#* should return an instance of
+	  the class of right operand.  [ruby-dev:24526]
+
+	* ext/zlib/zlib.c (zstream_detach_buffer): should not expose
+	  class-less object to Ruby world. [ruby-dev:24530]
+
+	* eval.c (proc_dup): provide Proc#dup as well.  [ruby-talk:116915]
+
+	* eval.c (ruby_exec): stack marking position may be higher than
+	  expected.  thanks to Guy Decoux.  [ruby-core:03527]
+
 Wed Oct 20 00:25:41 2004  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* eval.c (search_required): required name must not be changed before
diff --git a/array.c b/array.c
index 37f21f6d3b..a285f8a183 100644
--- a/array.c
+++ b/array.c
@@ -2506,7 +2506,7 @@ rb_ary_times(ary, times)
     }
 
     len = NUM2LONG(times);
-    if (len == 0) return rb_ary_new2(0);
+    if (len == 0) return ary_new(rb_obj_class(ary), 0);
     if (len < 0) {
 	rb_raise(rb_eArgError, "negative argument");
     }
diff --git a/eval.c b/eval.c
index 81d380eb84..e9b720b67d 100644
--- a/eval.c
+++ b/eval.c
@@ -1444,13 +1444,11 @@ extern NODE *ruby_eval_tree;
 
 static void cont_call _((VALUE));
 
-int
-ruby_exec()
+static int
+ruby_exec_internal()
 {
     int state;
-    volatile NODE *tmp;
 
-    Init_stack((void*)&tmp);
     PUSH_TAG(PROT_THREAD);
     PUSH_ITER(ITER_NOT);
     /* default visibility is private at toplevel */
@@ -1468,6 +1466,15 @@ ruby_exec()
     return state;
 }
 
+int
+ruby_exec()
+{
+    volatile NODE *tmp;
+
+    Init_stack((void*)&tmp);
+    return ruby_exec_internal();
+}
+
 void
 ruby_stop(ex)
     int ex;
@@ -7777,6 +7784,21 @@ blk_copy_prev(block)
 }
 
 
+static void
+blk_dup(dup, orig)
+    struct BLOCK *dup, *orig;
+{
+    MEMCPY(dup, orig, struct BLOCK, 1);
+    frame_dup(&dup->frame);
+
+    if (dup->iter) {
+	blk_copy_prev(dup);
+    }
+    else {
+	dup->prev = 0;
+    }
+}
+
 /*
  * MISSING: documentation
  */
@@ -7791,15 +7813,25 @@ proc_clone(self)
     Data_Get_Struct(self, struct BLOCK, orig);
     bind = Data_Make_Struct(rb_obj_class(self),struct BLOCK,blk_mark,blk_free,data);
     CLONESETUP(bind, self);
-    MEMCPY(data, orig, struct BLOCK, 1);
-    frame_dup(&data->frame);
+    blk_dup(data, orig);
 
-    if (data->iter) {
-	blk_copy_prev(data);
-    }
-    else {
-	data->prev = 0;
-    }
+    return bind;
+}
+
+/*
+ * MISSING: documentation
+ */
+
+static VALUE
+proc_dup(self)
+    VALUE self;
+{
+    struct BLOCK *orig, *data;
+    VALUE bind;
+
+    Data_Get_Struct(self, struct BLOCK, orig);
+    bind = Data_Make_Struct(rb_obj_class(self),struct BLOCK,blk_mark,blk_free,data);
+    blk_dup(data, orig);
 
     return bind;
 }
@@ -9224,6 +9256,7 @@ Init_Proc()
     rb_define_singleton_method(rb_cProc, "new", proc_s_new, -1);
 
     rb_define_method(rb_cProc, "clone", proc_clone, 0);
+    rb_define_method(rb_cProc, "dup", proc_dup, 0);
     rb_define_method(rb_cProc, "call", proc_call, -2);
     rb_define_method(rb_cProc, "arity", proc_arity, 0);
     rb_define_method(rb_cProc, "[]", proc_call, -2);
diff --git a/ext/socket/socket.c b/ext/socket/socket.c
index 044d411b29..5c57f2e1f1 100644
--- a/ext/socket/socket.c
+++ b/ext/socket/socket.c
@@ -285,6 +285,8 @@ bsock_setsockopt(sock, lev, optname, val)
     rb_secure(2);
     level = NUM2INT(lev);
     option = NUM2INT(optname);
+    GetOpenFile(sock, fptr);
+
     switch (TYPE(val)) {
       case T_FIXNUM:
 	i = FIX2INT(val);
@@ -304,7 +306,6 @@ bsock_setsockopt(sock, lev, optname, val)
 	break;
     }
 
-    GetOpenFile(sock, fptr);
     if (setsockopt(fileno(fptr->f), level, option, v, vlen) < 0)
 	rb_sys_fail(fptr->path);
 
@@ -2182,7 +2183,7 @@ sock_s_gethostbyaddr(argc, argv)
 	t = AF_INET6;
     }
 #endif
-    h = gethostbyaddr((char*)RSTRING(addr)->ptr, RSTRING(addr)->len, t);
+    h = gethostbyaddr(RSTRING(addr)->ptr, RSTRING(addr)->len, t);
     if (h == NULL) {
 #ifdef HAVE_HSTRERROR
 	extern int h_errno;
@@ -2223,14 +2224,15 @@ sock_s_getservbyaname(argc, argv)
 
     rb_scan_args(argc, argv, "11", &service, &proto);
     if (NIL_P(proto)) proto = rb_str_new2("tcp");
-    else StringValue(proto);
+    StringValue(service);
+    StringValue(proto);
 
-    sp = getservbyname((char*)RSTRING(service)->ptr, RSTRING(proto)->ptr);
+    sp = getservbyname(StringValueCStr(service),  StringValueCStr(proto));
     if (sp) {
 	port = ntohs(sp->s_port);
     }
     else {
-	char *s = StringValuePtr(service);
+	char *s = RSTRING(service)->ptr;
 	char *end;
 
 	port = strtoul(s, &end, 0);
diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c
index 9d1b204eb7..f5fe2e3fa4 100644
--- a/ext/zlib/zlib.c
+++ b/ext/zlib/zlib.c
@@ -532,6 +532,7 @@ zstream_detach_buffer(z)
     z->buf_filled = 0;
     z->stream.next_out = 0;
     z->stream.avail_out = 0;
+    RBASIC(dst)->klass = rb_cString;
     return dst;
 }
 
diff --git a/lib/delegate.rb b/lib/delegate.rb
index c6f8f5d946..10b135116d 100644
--- a/lib/delegate.rb
+++ b/lib/delegate.rb
@@ -76,10 +76,14 @@ class SimpleDelegator<Delegator
     @_sd_obj = obj
   end
 
-  def initialize_copy(obj)
+  def clone(obj)
     super
     __setobj__(obj.__getobj__.clone)
   end
+  def dup(obj)
+    super
+    __setobj__(obj.__getobj__.dup)
+  end
 end
 
 # backward compatibility ^_^;;;
@@ -108,9 +112,13 @@ def DelegateClass(superclass)
     def __setobj__(obj)
       @_dc_obj = obj
     end
-    def initialize_copy(obj)
+    def clone(obj)
       super
-    __setobj__(obj.__getobj__.clone)
+      __setobj__(obj.__getobj__.clone)
+    end
+    def dup(obj)
+      super
+      __setobj__(obj.__getobj__.dup)
     end
   }
   for method in methods