* array.c (rb_ary_permutation): hide temporal array.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@20062 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 6 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 36b813d7e7..b920098cdd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Oct 30 21:32:15 2008  Yusuke Endoh  <mame@tsg.ne.jp>
+
+	* array.c (rb_ary_permutation): hide temporal array.
+
 Thu Oct 30 14:45:45 2008  Martin Duerst  <duerst@it.aoyama.ac.jp>
 
 	* enc/trans/single_byte.trans: refactoring to make it easier
diff --git a/array.c b/array.c
index 45eef76c1f..d5da7f1bd1 100644
--- a/array.c
+++ b/array.c
@@ -3461,12 +3461,14 @@ rb_ary_permutation(int argc, VALUE *argv, VALUE ary)
 	volatile VALUE t1 = tmpbuf(n,sizeof(int));
 	int *used = (int*)RSTRING_PTR(t1);
 	VALUE ary0 = ary_make_substitution(ary); /* private defensive copy of ary */
+	RBASIC(ary0)->klass = 0;
 
 	for (i = 0; i < n; i++) used[i] = 0; /* initialize array */
 
 	permute0(n, r, p, 0, used, ary0); /* compute and yield permutations */
 	RB_GC_GUARD(t0);
 	RB_GC_GUARD(t1);
+	RBASIC(ary0)->klass = rb_cArray;
     }
     return ary;
 }