https://git.ruby-lang.org/ruby.git/commit/?id=6158e28f8d

From 6158e28f8d02026e21317d8a0c2cb2115b3a0660 Mon Sep 17 00:00:00 2001
From: Akira Matsuda <ronnie@d...>
Date: Wed, 31 Jul 2019 14:38:38 +0900
Subject: [ruby/logger] Avoid creating [] and "" when logging an Exception that
 has no backtrace

https://github.com/ruby/logger/commit/75fd308053

diff --git a/lib/logger/formatter.rb b/lib/logger/formatter.rb
index 206c35d..852cffe 100644
--- a/lib/logger/formatter.rb
+++ b/lib/logger/formatter.rb
@@ -27,7 +27,7 @@ class Logger https://github.com/ruby/ruby/blob/trunk/lib/logger/formatter.rb#L27
       when ::String
         msg
       when ::Exception
-        "#{ msg.message } (#{ msg.class })\n#{ (msg.backtrace || []).join("\n") }"
+        "#{ msg.message } (#{ msg.class })\n#{ msg.backtrace.join("\n") if msg.backtrace }"
       else
         msg.inspect
       end
-- 
cgit v0.10.2


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