diff --git a/ChangeLog b/ChangeLog
index 49fc41556a..ccf502c25e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,7 +1,30 @@
+Mon Apr  7 15:49:09 2003  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* ext/socket/socket.c (sock_s_unpack_sockaddr_in): remove struct
+	  size check.  getnameinfo(3) can handle. [ruby-dev:19967]
+
+Mon Apr  7 01:33:31 2003  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* io.c (io_read): do not call rb_sys_fail() when required data
+	  length is zero. (ruby-bugs-ja PR#420)
+
+	* eval.c (umethod_proc): should raise TypeError, instead of
+	  returning error causing Proc.  Following the principle of "fail
+	  early".  [ruby-core:00927]
+
 Sun Apr  6 00:35:37 2003  Tanaka Akira  <akr@m17n.org>
 
         * sample/exyacc.rb: use Regexp in gsub!.
 
+Sat Apr  5 23:41:28 2003  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* pack.c (pack_pack): small but serious typo.
+
+Sat Apr  5 01:41:28 2003  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* eval.c (backtrace): skip internal allocator frame.
+	  (ruby-bugs-ja PR#416)
+
 Fri Apr  4 10:53:22 2003  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* eval.c (assign): should prepare mrhs by svalue_to_mrhs().
diff --git a/eval.c b/eval.c
index 90f91408ad..9b4420d7af 100644
--- a/eval.c
+++ b/eval.c
@@ -5087,6 +5087,9 @@ backtrace(lev)
     NODE *n;
 
     ary = rb_ary_new();
+    if (frame->last_func == ID_ALLOCATOR) {
+	frame = frame->prev;
+    }
     if (lev < 0) {
 	ruby_set_current_source();
 	if (frame->last_func) {
@@ -7317,13 +7320,6 @@ bmcall(args, method)
     return method_call(RARRAY(a)->len, RARRAY(a)->ptr, method);
 }
 
-static VALUE
-umcall(args, method)
-    VALUE args, method;
-{
-    return method_call(0, 0, method);
-}
-
 VALUE
 rb_proc_new(func, val)
     VALUE (*func)(ANYARGS);	/* VALUE yieldarg[, VALUE procarg] */
@@ -7343,7 +7339,8 @@ static VALUE
 umethod_proc(method)
     VALUE method;
 {
-    return rb_iterate((VALUE(*)_((VALUE)))mproc, method, umcall, method);
+    rb_raise(rb_eTypeError, "unbound method cannot be executed; bind first");
+    return Qnil; 		/* not reached */
 }
 
 static VALUE
diff --git a/ext/socket/socket.c b/ext/socket/socket.c
index 6cdedd22e0..14fbe6feb6 100644
--- a/ext/socket/socket.c
+++ b/ext/socket/socket.c
@@ -2328,10 +2328,6 @@ sock_s_unpack_sockaddr_in(self, addr)
     VALUE host;
 
     sockaddr = (struct sockaddr_in*)StringValuePtr(addr);
-    if (RSTRING(addr)->len != sizeof(struct sockaddr_in)) {
-	rb_raise(rb_eTypeError, "sockaddr_in size differs - %ld required; %d given",
-		 RSTRING(addr)->len, sizeof(struct sockaddr_in));
-    }
     host = mkipaddr((struct sockaddr*)sockaddr);
     OBJ_INFECT(host, addr);
     return rb_assoc_new(INT2NUM(ntohs(sockaddr->sin_port)), host);
diff --git a/io.c b/io.c
index e9a4ced2c0..5024b75d26 100644
--- a/io.c
+++ b/io.c
@@ -836,7 +836,7 @@ io_read(argc, argv, io)
     if (n == 0) {
 	rb_str_resize(str,0);
 	if (feof(fptr->f)) return Qnil;
-	rb_sys_fail(fptr->path);
+	if (len > 0) rb_sys_fail(fptr->path);
     }
     RSTRING(str)->len = n;
     RSTRING(str)->ptr[n] = '\0';
diff --git a/object.c b/object.c
index 69e99f60b0..ce43886348 100644
--- a/object.c
+++ b/object.c
@@ -740,7 +740,7 @@ rb_class_allocate_instance(klass)
     if (FL_TEST(klass, FL_SINGLETON)) {
 	rb_raise(rb_eTypeError, "can't create instance of virtual class");
     }
-    {
+    else {
 	NEWOBJ(obj, struct RObject);
 	OBJSETUP(obj, klass, T_OBJECT);
 	return (VALUE)obj;
diff --git a/pack.c b/pack.c
index 000c6e5ca9..58aa5d4105 100644
--- a/pack.c
+++ b/pack.c
@@ -550,7 +550,7 @@ pack_pack(ary, fmt)
 			char c = byte & 0xff;
 			rb_str_buf_cat(res, &c, 1);
 		    }
-		    len = 1;
+		    len = j;
 		    goto grow;
 		}
 		break;