diff --git a/ChangeLog b/ChangeLog
index a11f11c15a..d46e3b0e34 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Fri May 16 12:40:40 2003  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* eval.c (block_pass): chain previous block to the pushing block.
+
+	* time.c (time_cmp): does not compare with numbers for
+	  interchangeability. (ruby-bugs-ja PR#458)
+
 Thu May 15 21:55:54 2003  why the lucky stiff <ruby-cvs@whytheluckystiff.net>
 
     * lib/gram.c: fixes to one-line documents and end of stream documents.
diff --git a/eval.c b/eval.c
index df4bfce42a..516357aab4 100644
--- a/eval.c
+++ b/eval.c
@@ -6984,6 +6984,7 @@ block_pass(self, node)
     /* PUSH BLOCK from data */
     old_block = ruby_block;
     _block = *data;
+    _block.prev = old_block;
     ruby_block = &_block;
     PUSH_ITER(ITER_PRE);
     ruby_frame->iter = ITER_PRE;
diff --git a/time.c b/time.c
index 149f8eca8c..4b402d1c59 100644
--- a/time.c
+++ b/time.c
@@ -716,26 +716,21 @@ time_cmp(time1, time2)
 	}
 	if (tobj1->tv.tv_sec > i) return INT2FIX(1);
 	return INT2FIX(-1);
-	
-      case T_FLOAT:
-	return rb_dbl_cmp((double)tobj1->tv.tv_sec + (double)tobj1->tv.tv_usec*1e-6,
-			  RFLOAT(time2)->value);
 
-      case T_BIGNUM:
-	return rb_dbl_cmp((double)tobj1->tv.tv_sec + (double)tobj1->tv.tv_usec*1e-6,
-			  rb_big2dbl(time2));
-    }
-
-    if (TYPE(time2) == T_DATA && RDATA(time2)->dfree == time_free) {
-	GetTimeval(time2, tobj2);
-	if (tobj1->tv.tv_sec == tobj2->tv.tv_sec) {
-	    if (tobj1->tv.tv_usec == tobj2->tv.tv_usec) return INT2FIX(0);
-	    if (tobj1->tv.tv_usec > tobj2->tv.tv_usec) return INT2FIX(1);
+      case T_DATA:
+	if (RDATA(time2)->dfree == time_free) {
+	    GetTimeval(time2, tobj2);
+	    if (tobj1->tv.tv_sec == tobj2->tv.tv_sec) {
+		if (tobj1->tv.tv_usec == tobj2->tv.tv_usec) return INT2FIX(0);
+		if (tobj1->tv.tv_usec > tobj2->tv.tv_usec) return INT2FIX(1);
+		return INT2FIX(-1);
+	    }
+	    if (tobj1->tv.tv_sec > tobj2->tv.tv_sec) return INT2FIX(1);
 	    return INT2FIX(-1);
 	}
-	if (tobj1->tv.tv_sec > tobj2->tv.tv_sec) return INT2FIX(1);
-	return INT2FIX(-1);
+	break;
     }
+
     return Qnil;
 }