From 302ae913e01d2ad9e316c4b003342a58db2ed542 Mon Sep 17 00:00:00 2001
From: normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 13 Feb 2017 02:04:26 +0000
Subject: array.c (ary_recycle_hash): use rb_gc_force_recycle

Hidden objects (RBASIC_CLASS(hash) == 0) can never become
visible to other threads or signal handlers via
ObjectSpace.each_object or similar means.  Thus it is safe to
forcibly recycle the object slot for future use, here.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57615 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 array.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/array.c b/array.c
index f170a942ac..e970ca3787 100644
--- a/array.c
+++ b/array.c
@@ -4095,12 +4095,12 @@ ary_make_hash_by(VALUE ary)
 static inline void
 ary_recycle_hash(VALUE hash)
 {
+    assert(RBASIC_CLASS(hash) == 0);
     if (RHASH(hash)->ntbl) {
 	st_table *tbl = RHASH(hash)->ntbl;
-	RHASH(hash)->ntbl = 0;
 	st_free_table(tbl);
     }
-    RB_GC_GUARD(hash);
+    rb_gc_force_recycle(hash);
 }
 
 /*
-- 
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