From 91cb5c1a70b2f659b6ee1dad4ca7c658fe1e00f9 Mon Sep 17 00:00:00 2001
From: ko1 <ko1@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 12 Feb 2019 03:45:15 +0000
Subject: fix empty Hash memsize.

* gc.c (obj_memsize_of): ar_table ptr can be NULL (size == 0).


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67054 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 gc.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'gc.c')

diff --git a/gc.c b/gc.c
index fbdb354af6..9f6dd75400 100644
--- a/gc.c
+++ b/gc.c
@@ -3356,8 +3356,10 @@ obj_memsize_of(VALUE obj, int use_all_types)
 	break;
       case T_HASH:
         if (RHASH_AR_TABLE_P(obj)) {
-            size_t rb_hash_ar_table_size();
-            size += rb_hash_ar_table_size();
+            if (RHASH_AR_TABLE(obj) != NULL) {
+                size_t rb_hash_ar_table_size();
+                size += rb_hash_ar_table_size();
+            }
 	}
         else {
             VM_ASSERT(RHASH_ST_TABLE(obj) != NULL);
-- 
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