merges r30736,r30738 and r30739 from trunk into ruby_1_9_2.

--
* array.c (rb_ary_uniq_bang): call ARY_SET_LEN(ary, 0) before
  rb_resize_capa because rb_resize_capa expects resized length is
  smaller than current array length. call rb_ary_unshare before
  rb_resize_capa because rb_resize_capa losts the reference to
  original shared array.
--
Add ML Reference and a test for r30736 [ruby-core:34997]
--
Additional fix for r30736

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@31200 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 1 deletions

diff --git a/array.c b/array.c
index 6640a1af28..60f3f5646b 100644
--- a/array.c
+++ b/array.c
@@ -3430,8 +3430,12 @@ rb_ary_uniq_bang(VALUE ary)
 	if (RARRAY_LEN(ary) == (i = RHASH_SIZE(hash))) {
 	    return Qnil;
 	}
-	ary_resize_capa(ary, i);
 	ARY_SET_LEN(ary, 0);
+	if (ARY_SHARED_P(ary) && !ARY_EMBED_P(ary)) {
+	    rb_ary_unshare(ary);
+	    FL_SET_EMBED(ary);
+	}
+	ary_resize_capa(ary, i);
 	st_foreach(RHASH_TBL(hash), push_value, ary);
     }
     else {