From ef93ff64054f2aa7e4451387fb768fe2307247a9 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Mon, 11 Feb 2019 15:19:20 +0900
Subject: Should not copy keys&values when a hash table is empty; fix #4270

---
 src/hash.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/hash.c')

diff --git a/src/hash.c b/src/hash.c
index 6b92344c3..fd963c3de 100644
--- a/src/hash.c
+++ b/src/hash.c
@@ -536,6 +536,7 @@ ht_copy(mrb_state *mrb, htable *t)
 
   seg = t->rootseg;
   t2 = ht_new(mrb);
+  if (t->size == 0) return t2;
 
   while (seg) {
     for (i=0; i<seg->size; i++) {
-- 
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