From 278a99aede1da58170aca6832353c5125423f12f Mon Sep 17 00:00:00 2001
From: "Michael S. Klishin" <michael@novemberain.com>
Date: Sat, 2 Aug 2008 16:02:04 +0300
Subject: [PATCH] Log a warning if Rack application returns nil body.

---
 lib/thin/connection.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/thin/connection.rb b/lib/thin/connection.rb
index 48c57528..1f87eb73 100644
--- a/lib/thin/connection.rb
+++ b/lib/thin/connection.rb
@@ -74,7 +74,8 @@ def post_process(result)
       set_content_length(result) if need_content_length?(result)
       
       @response.status, @response.headers, @response.body = result
-      
+
+      log "!! Rack application returned nil body. Probably you wanted it to be an empty string?" if @response.body.nil?
       # Make the response persistent if requested by the client
       @response.persistent! if @request.persistent?