From 9653d9d6c496b87f00bb5844a95675b3c7e58de2 Mon Sep 17 00:00:00 2001
From: Mike Perham <mperham@gmail.com>
Date: Tue, 3 Sep 2019 11:05:48 -0700
Subject: [PATCH] Handle nil logger, fixes #4240

---
 Changes.md     | 5 +++++
 lib/sidekiq.rb | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/Changes.md b/Changes.md
index eb7931b6..a5d721f3 100644
--- a/Changes.md
+++ b/Changes.md
@@ -2,6 +2,11 @@
 
 [Sidekiq Changes](https://github.com/mperham/sidekiq/blob/master/Changes.md) | [Sidekiq Pro Changes](https://github.com/mperham/sidekiq/blob/master/Pro-Changes.md) | [Sidekiq Enterprise Changes](https://github.com/mperham/sidekiq/blob/master/Ent-Changes.md)
 
+HEAD
+---------
+
+- Gracefully handle `Sidekiq.logger = nil` [#4240]
+
 6.0
 ---------
 
diff --git a/lib/sidekiq.rb b/lib/sidekiq.rb
index b0ab162a..837c4c33 100644
--- a/lib/sidekiq.rb
+++ b/lib/sidekiq.rb
@@ -199,6 +199,10 @@ module Sidekiq
   end
 
   def self.logger=(logger)
+    if logger.nil?
+      self.logger.level = Logger::FATAL
+      return self.logger
+    end
     @logger = logger
   end