1 files changed, 8 insertions, 5 deletions
diff --git a/activesupport/lib/active_support/clean_logger.rb b/activesupport/lib/active_support/clean_logger.rb
index 07162f1d44..330dbb2e46 100644
--- a/activesupport/lib/active_support/clean_logger.rb
+++ b/activesupport/lib/active_support/clean_logger.rb
@@ -4,19 +4,22 @@ class Logger #:nodoc:
   # Silences the logger for the duration of the block.
   def silence(temporary_level = Logger::ERROR)
     old_logger_level, self.level = level, temporary_level
-    yield
+    yield self
   ensure
     self.level = old_logger_level
   end
 
   private
-    # Ruby 1.8.3 swapped the format_message params.
-    if RUBY_VERSION < '1.8.3'
-      def format_message(severity, timestamp, msg, progname)
+    # Ruby 1.8.3 transposed the msg and progname arguments to format_message.
+    # We can't test RUBY_VERSION because some distributions don't keep Ruby
+    # and its standard library in sync, leading to installations of Ruby 1.8.2
+    # with Logger from 1.8.3 and vice versa.
+    if method_defined?(:formatter=)
+      def format_message(severity, timestamp, progname, msg)
         "#{msg}\n"
       end
     else
-      def format_message(severity, timestamp, progname, msg)
+      def format_message(severity, timestamp, msg, progname)
         "#{msg}\n"
       end
     end