[ruby/logger] Avoid creating [] and "" when logging an Exception that has no backtrace

https://github.com/ruby/logger/commit/75fd308053
2019-07-31 14:38:38 +09:00 · 2019-07-31 14:38:38 +09:00 · 6158e28f8d
parent 0aafc32995
commit 6158e28f8d
1 changed files with 1 additions and 1 deletions
--- a/lib/logger/formatter.rb
+++ b/lib/logger/formatter.rb
@ -27,7 +27,7 @@ class Logger
      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