* array.c (ary_partial0): recovers mistakenly feature change at r19723.

  Array#[m,n] had returned an Array even for an instance of a
  subclass.


git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_9_1@20076 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 1 deletions

diff --git a/array.c b/array.c
index 46d31ca4c..732b981b2 100644
--- a/array.c
+++ b/array.c
@@ -604,7 +604,10 @@ ary_make_partial0(VALUE ary, long offset, long len)
     assert(offset+len <= RARRAY_LEN(ary));
 
     if (len <= RARRAY_EMBED_LEN_MAX) {
-        return rb_ary_new4(len, RARRAY_PTR(ary) + offset);
+        VALUE result = ary_alloc(rb_obj_class(ary));
+        MEMCPY(ARY_EMBED_PTR(result), RARRAY_PTR(ary) + offset, VALUE, len);
+        ARY_SET_EMBED_LEN(result, len);
+        return result;
     }
     else {
         VALUE shared, result = ary_alloc(rb_obj_class(ary));