Avoid unnecessary catching of Exception instead of StandardError.

activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb

@@ -370,7 +370,7 @@ def rollback_transaction_records(rollback)
             records.uniq.each do |record|
               begin
                 record.rolledback!(rollback)
-              rescue Exception => e
+              rescue => e
                 record.logger.error(e) if record.respond_to?(:logger) && record.logger
               end
             end
@@ -385,7 +385,7 @@ def commit_transaction_records
             records.uniq.each do |record|
               begin
                 record.committed!
-              rescue Exception => e
+              rescue => e
                 record.logger.error(e) if record.respond_to?(:logger) && record.logger
               end
             end

activerecord/lib/active_record/connection_adapters/abstract_adapter.rb

@@ -286,7 +286,7 @@ def log(sql, name = "SQL", binds = [])
           :name          => name,
           :connection_id => object_id,
           :binds         => binds) { yield }
-      rescue Exception => e
+      rescue => e
         message = "#{e.class.name}: #{e.message}: #{sql}"
         @logger.error message if @logger
         exception = translate_exception(e, message)

activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb

@@ -264,19 +264,19 @@ def update_sql(sql, name = nil) #:nodoc:
 
       def begin_db_transaction
         execute "BEGIN"
-      rescue Exception
+      rescue
         # Transactions aren't supported
       end
 
       def commit_db_transaction #:nodoc:
         execute "COMMIT"
-      rescue Exception
+      rescue
         # Transactions aren't supported
       end
 
       def rollback_db_transaction #:nodoc:
         execute "ROLLBACK"
-      rescue Exception
+      rescue
         # Transactions aren't supported
       end
 

activesupport/lib/active_support/log_subscriber.rb

@@ -92,7 +92,7 @@ def call(message, *args)
       method = message.split('.').first
       begin
         send(method, ActiveSupport::Notifications::Event.new(message, *args))
-      rescue Exception => e
+      rescue => e
         logger.error "Could not log #{message.inspect} event. #{e.class}: #{e.message} #{e.backtrace}"
       end
     end

activesupport/lib/active_support/multibyte/unicode.rb

@@ -331,7 +331,7 @@ def #{attr_name}     # def codepoints
         def load
           begin
             @codepoints, @composition_exclusion, @composition_map, @boundary, @cp1252 = File.open(self.class.filename, 'rb') { |f| Marshal.load f.read }
-          rescue Exception => e
+          rescue => e
               raise IOError.new("Couldn't load the Unicode tables for UTF8Handler (#{e.message}), ActiveSupport::Multibyte is unusable")
           end