gc.c: set finalizing

* gc.c (gc_start_internal, rb_gc_start): set finalizing flag
  whenever calling deferred finalizers not to recurse.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55720 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Fri Jul 22 06:12:51 2016  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* gc.c (gc_start_internal, rb_gc_start): set finalizing flag
+	  whenever calling deferred finalizers not to recurse.
+
 Thu Jul 21 22:26:40 2016  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
 
 	* missing/strl{cat,cpy}.c: Update latest upstream files.

gc.c

@@ -6580,7 +6580,7 @@ gc_start_internal(int argc, VALUE *argv, VALUE self)
     }
 
     garbage_collect(objspace, full_mark, immediate_mark, immediate_sweep, GPR_FLAG_METHOD);
-    if (!finalizing) finalize_deferred(objspace);
+    gc_finalize_deferred(objspace);
 
     return Qnil;
 }
@@ -6597,7 +6597,7 @@ rb_gc(void)
 {
     rb_objspace_t *objspace = &rb_objspace;
     garbage_collect(objspace, TRUE, TRUE, TRUE, GPR_FLAG_CAPI);
-    if (!finalizing) finalize_deferred(objspace);
+    gc_finalize_deferred(objspace);
 }
 
 int