merge revision(s) 43994: [Backport #9205]

	* gc.c (finalize_deferred): flush all deferred finalizers while other
	  finalizers can get ready to run newly by lazy sweep.
	  [ruby-core:58833] [Bug #9205]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@44319 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 3 deletions

diff --git a/gc.c b/gc.c
index 84af4d6f58..a654e2ec5c 100644
--- a/gc.c
+++ b/gc.c
@@ -1443,10 +1443,9 @@ finalize_list(rb_objspace_t *objspace, RVALUE *p)
 static void
 finalize_deferred(rb_objspace_t *objspace)
 {
-    RVALUE *p = deferred_final_list;
-    deferred_final_list = 0;
+    RVALUE *p;
 
-    if (p) {
+    while ((p = ATOMIC_PTR_EXCHANGE(deferred_final_list, 0)) != 0) {
 	finalize_list(objspace, p);
     }
 }