Send a string, not an array

1 files changed, 4 insertions, 1 deletions

diff --git a/lib/chef/log.rb b/lib/chef/log.rb
index aff6252e12..bf846c2072 100644
--- a/lib/chef/log.rb
+++ b/lib/chef/log.rb
@@ -38,7 +38,10 @@ class Chef
     end
 
     def self.deprecation(msg=nil, location=caller(2..2)[0], &block)
-      msg << " at #{Array(location).join("\n")}"
+      if msg
+        msg << " at #{Array(location).join("\n")}"
+        msg = msg.join("") if msg.respond_to?(:join)
+      end
       if Chef::Config[:treat_deprecation_warnings_as_errors]
         error(msg, &block)
         raise Chef::Exceptions::DeprecatedFeatureError.new(msg)