* array.c (rb_ary_shift_m): use RARRAY_PTR_USE() without WB because

  there are not new relations.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43557 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 1 deletions

diff --git a/array.c b/array.c
index 2a85772c97..f1919fd1fe 100644
--- a/array.c
+++ b/array.c
@@ -1070,7 +1070,9 @@ rb_ary_shift_m(int argc, VALUE *argv, VALUE ary)
         ARY_INCREASE_PTR(ary, n);
     }
     else {
-	MEMMOVE(RARRAY_PTR(ary), RARRAY_PTR(ary)+n, VALUE, RARRAY_LEN(ary)-n);
+	RARRAY_PTR_USE(ary, ptr, {
+	    MEMMOVE(ptr, ptr + n, VALUE, RARRAY_LEN(ary)-n);
+	}); /* WB: no new reference */
     }
     ARY_INCREASE_LEN(ary, -n);