From a763e3460f594f60a5d2e8eba5f7da981d717a55 Mon Sep 17 00:00:00 2001
From: ko1 <ko1@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 29 Nov 2018 08:03:55 +0000
Subject: clear dst Hash on Hash#replace. [Bug #15358]

* hash.c (linear_copy): solve two issues on `Hash#replace`.
  (1) fix memory leak
      (1-1) don't allocate memory if destination already
            has a memory area.
      (1-2) free destination memory if src is NULL.
  (2) clear transient heap flag if src is NULL. [Bug #15358]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66091 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_hash.rb | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'test/ruby/test_hash.rb')

diff --git a/test/ruby/test_hash.rb b/test/ruby/test_hash.rb
index 03ebd38f1f..7db3c27f87 100644
--- a/test/ruby/test_hash.rb
+++ b/test/ruby/test_hash.rb
@@ -755,6 +755,14 @@ class TestHash < Test::Unit::TestCase
     assert_predicate(h, :compare_by_identity?)
   end
 
+  def test_replace_bug15358
+    h1 = {}
+    h2 = {a:1,b:2,c:3,d:4,e:5}
+    h2.replace(h1)
+    GC.start
+    assert(true)
+  end
+
   def test_shift
     h = @h.dup
 
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