1 files changed, 6 insertions, 6 deletions
diff --git a/activesupport/lib/active_support/log_subscriber.rb b/activesupport/lib/active_support/log_subscriber.rb
index 6296c1d4b8..d2a6e1bd82 100644
--- a/activesupport/lib/active_support/log_subscriber.rb
+++ b/activesupport/lib/active_support/log_subscriber.rb
@@ -3,7 +3,7 @@ require 'active_support/core_ext/class/attribute'
 
 module ActiveSupport
   # ActiveSupport::LogSubscriber is an object set to consume ActiveSupport::Notifications
-  # with the sole purpose of logging them. The log subscriber dispatches notifications to 
+  # with the sole purpose of logging them. The log subscriber dispatches notifications to
   # a registered object based on its given namespace.
   #
   # An example would be Active Record log subscriber responsible for logging queries:
@@ -75,7 +75,8 @@ module ActiveSupport
         @@flushable_loggers ||= begin
           loggers = log_subscribers.map(&:logger)
           loggers.uniq!
-          loggers.select { |l| l.respond_to?(:flush) }
+          loggers.select! { |l| l.respond_to?(:flush) }
+          loggers
         end
       end
 
@@ -92,7 +93,7 @@ module ActiveSupport
       begin
         send(method, ActiveSupport::Notifications::Event.new(message, *args))
       rescue Exception => e
-        logger.error "Could not log #{message.inspect} event. #{e.class}: #{e.message}"
+        logger.error "Could not log #{message.inspect} event. #{e.class}: #{e.message} #{e.backtrace}"
       end
     end
 
@@ -100,9 +101,8 @@ module ActiveSupport
 
     %w(info debug warn error fatal unknown).each do |level|
       class_eval <<-METHOD, __FILE__, __LINE__ + 1
-        def #{level}(*args, &block)
-          return unless logger
-          logger.#{level}(*args, &block)
+        def #{level}(progname = nil, &block)
+          logger.#{level}(progname, &block) if logger
         end
       METHOD
     end