From 96a414d0a53db2d0c86c71ac5177b4fdb5e1571d Mon Sep 17 00:00:00 2001
From: Guo Xiang Tan <tgx_world@hotmail.com>
Date: Mon, 6 Nov 2017 16:01:32 +0800
Subject: [PATCH] Log `progname` as empty string if `nil`.

---
 lib/unicorn/unicorn_json_log_formatter.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/unicorn/unicorn_json_log_formatter.rb b/lib/unicorn/unicorn_json_log_formatter.rb
index 4410c467bdc..7d68d7368e9 100644
--- a/lib/unicorn/unicorn_json_log_formatter.rb
+++ b/lib/unicorn/unicorn_json_log_formatter.rb
@@ -5,7 +5,7 @@ class UnicornJSONLogFormatter < Logger::Formatter
     default = {
       severity: severity,
       datetime: datetime,
-      progname: progname,
+      progname: progname || '',
       pid: $$,
     }