From df916e86b79b731ce33d201ca4009b03001c30c3 Mon Sep 17 00:00:00 2001
From: Carson Reinke <carson@reinke.co>
Date: Tue, 27 Oct 2015 12:27:37 -0400
Subject: [PATCH] compact! only returns array if changes were made

---
 lib/memory_diagnostics.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/memory_diagnostics.rb b/lib/memory_diagnostics.rb
index e484bf51293..a49480677a9 100644
--- a/lib/memory_diagnostics.rb
+++ b/lib/memory_diagnostics.rb
@@ -21,8 +21,8 @@ module MemoryDiagnostics
     require 'objspace'
     diff = diff.map do |id|
       ObjectSpace._id2ref(id) rescue nil
-    end.compact!
-    diff ||= []
+    end
+    diff.compact!
 
     report = "#{diff.length} objects have leaked\n"