diff --git a/ChangeLog b/ChangeLog
index ccf249ff89..bf56842f45 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+Tue Jan 11 13:06:38 2011  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* array.c (rb_ary_resize): should care of embeded array when extending
+	  the array.
+
+	* array.c (rb_ary_resize): need to set capa when changing the real
+	  size of the array.
+	  these are latent bugs.
+
 Mon Jan 10 22:46:43 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* include/ruby/defines.h (CASEFOLD_FILESYSTEM): HFS+ is case
diff --git a/array.c b/array.c
index 43cc910cdc..c86562e5dc 100644
--- a/array.c
+++ b/array.c
@@ -1332,7 +1332,7 @@ rb_ary_resize(VALUE ary, long len)
 	    ary_double_capa(ary, len);
 	}
 	rb_mem_clear(RARRAY_PTR(ary) + olen, len - olen);
-        ARY_SET_HEAP_LEN(ary, len);
+        ARY_SET_LEN(ary, len);
     }
     else if (ARY_EMBED_P(ary)) {
         ARY_SET_EMBED_LEN(ary, len);
@@ -1347,6 +1347,7 @@ rb_ary_resize(VALUE ary, long len)
     else {
 	if (olen > len + ARY_DEFAULT_SIZE) {
 	    REALLOC_N(RARRAY(ary)->as.heap.ptr, VALUE, len);
+	    ARY_SET_CAPA(ary, len);
 	}
 	ARY_SET_HEAP_LEN(ary, len);
     }