From a1fb68b9ab2f6721b10ccc572b825bda450d603e Mon Sep 17 00:00:00 2001
From: Andrew Arnott <andrewarnott@gmail.com>
Date: Fri, 7 Feb 2020 16:29:15 -0700
Subject: [PATCH] Fix `MessagePackSecurity.GetEqualityComparer<object>` to not
 return null

Fixes #810
---
 src/MessagePack/MessagePackSecurity.cs              | 1 +
 tests/MessagePack.Tests/MessagePackSecurityTests.cs | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/src/MessagePack/MessagePackSecurity.cs b/src/MessagePack/MessagePackSecurity.cs
index a635399ab..26374a413 100644
--- a/src/MessagePack/MessagePackSecurity.cs
+++ b/src/MessagePack/MessagePackSecurity.cs
@@ -56,6 +56,7 @@ private MessagePackSecurity()
         /// </summary>
         /// <param name="copyFrom">The template to copy from.</param>
         protected MessagePackSecurity(MessagePackSecurity copyFrom)
+            : this()
         {
             if (copyFrom is null)
             {
diff --git a/tests/MessagePack.Tests/MessagePackSecurityTests.cs b/tests/MessagePack.Tests/MessagePackSecurityTests.cs
index 37c04744f..0684e54e9 100644
--- a/tests/MessagePack.Tests/MessagePackSecurityTests.cs
+++ b/tests/MessagePack.Tests/MessagePackSecurityTests.cs
@@ -125,6 +125,13 @@ public void EqualityComparer_ObjectFallback()
         Assert.NotEqual(eq.GetHashCode(o), eq.GetHashCode(new object()));
     }
 
+    [Fact]
+    public void EqualityComparer_ObjectFallback_AfterCopyCtor()
+    {
+        var security = MessagePackSecurity.UntrustedData.WithMaximumObjectGraphDepth(15);
+        Assert.NotNull(security.GetEqualityComparer<object>());
+    }
+
     /// <summary>
     /// Verifies that arbitrary other types not known to be hash safe will be rejected.
     /// </summary>