From 2d17694de73433900c92e8c9bec854c9e52b5ac3 Mon Sep 17 00:00:00 2001
From: nagachika <nagachika@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 26 Aug 2016 19:01:49 +0000
Subject: merge revision(s) 55896: [Backport #12614]

	* id_table.c (hash_table_extend): should not shrink the table than
	  the previous capacity.  [ruby-core:76534] [Bug #12614]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@56019 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 id_table.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'id_table.c')

diff --git a/id_table.c b/id_table.c
index 13adf6babb..423b00669b 100644
--- a/id_table.c
+++ b/id_table.c
@@ -1302,6 +1302,9 @@ hash_table_extend(struct hash_id_table* tbl)
 	int i;
 	item_t* old;
 	struct hash_id_table tmp_tbl = {0, 0, 0};
+	if (new_cap < tbl->capa) {
+	    new_cap = round_capa(tbl->used + (tbl->used >> 1));
+	}
 	tmp_tbl.capa = new_cap;
 	tmp_tbl.items = ZALLOC_N(item_t, new_cap);
 	for (i = 0; i < tbl->capa; i++) {
-- 
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