bignum.c: hide intermediate Bignums

* bignum.c (rb_big_eq): hide intermediate Bignums not just freeing
  memory.  [ruby-core:53893] [Bug #8204]
* object.c (rb_obj_hide): hide an object by clearing klass.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40077 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 0 deletions

diff --git a/bignum.c b/bignum.c
index 6d2b25f997..b2daac75af 100644
--- a/bignum.c
+++ b/bignum.c
@@ -1095,6 +1095,8 @@ big2str_karatsuba(VALUE x, int base, char* ptr,
 
     b = power_cache_get_power(base, n1, &m1);
     bigdivmod(x, b, &q, &r);
+    rb_obj_hide(q);
+    rb_obj_hide(r);
     lh = big2str_karatsuba(q, base, ptr, (len - m1)/2,
 			   len - m1, hbase, trim);
     rb_big_resize(q, 0);