diff --git a/Lib/logging/__init__.py b/Lib/logging/__init__.py
index eb1f934..cd640bb 100644
--- a/Lib/logging/__init__.py
+++ b/Lib/logging/__init__.py
@@ -890,7 +890,7 @@
                                           None, sys.stderr)
                 sys.stderr.write('Logged from file %s, line %s\n' % (
                                  record.filename, record.lineno))
-            except IOError:
+            except IOError: #pragma: no cover
                 pass    # see issue 5971
             finally:
                 del ei
diff --git a/Lib/logging/config.py b/Lib/logging/config.py
index c7359ca..7daa2df 100644
--- a/Lib/logging/config.py
+++ b/Lib/logging/config.py
@@ -30,7 +30,7 @@
 try:
     import _thread as thread
     import threading
-except ImportError:
+except ImportError: #pragma: no cover
     thread = None
 
 from socketserver import ThreadingTCPServer, StreamRequestHandler
@@ -786,7 +786,7 @@
     and which you can join() when appropriate. To stop the server, call
     stopListening().
     """
-    if not thread:
+    if not thread: #pragma: no cover
         raise NotImplementedError("listen() needs threading to work")
 
     class ConfigStreamHandler(StreamRequestHandler):
@@ -825,7 +825,7 @@
                         file = io.StringIO(chunk)
                         try:
                             fileConfig(file)
-                        except (KeyboardInterrupt, SystemExit):
+                        except (KeyboardInterrupt, SystemExit): #pragma: no cover
                             raise
                         except:
                             traceback.print_exc()
diff --git a/Lib/logging/handlers.py b/Lib/logging/handlers.py
index 5616920..42c2347 100644
--- a/Lib/logging/handlers.py
+++ b/Lib/logging/handlers.py
@@ -31,7 +31,7 @@
 
 try:
     import codecs
-except ImportError:
+except ImportError: #pragma: no cover
     codecs = None
 
 #
@@ -57,7 +57,7 @@
         """
         Use the specified filename for streamed logging
         """
-        if codecs is None:
+        if codecs is None: #pragma: no cover
             encoding = None
         logging.FileHandler.__init__(self, filename, mode, encoding, delay)
         self.mode = mode
@@ -74,7 +74,7 @@
             if self.shouldRollover(record):
                 self.doRollover()
             logging.FileHandler.emit(self, record)
-        except (KeyboardInterrupt, SystemExit):
+        except (KeyboardInterrupt, SystemExit): #pragma: no cover
             raise
         except:
             self.handleError(record)
@@ -542,7 +542,7 @@
         try:
             s = self.makePickle(record)
             self.send(s)
-        except (KeyboardInterrupt, SystemExit):
+        except (KeyboardInterrupt, SystemExit): #pragma: no cover
             raise
         except:
             self.handleError(record)
@@ -794,7 +794,7 @@
                 self.socket.sendto(msg, self.address)
             else:
                 self.socket.sendall(msg)
-        except (KeyboardInterrupt, SystemExit):
+        except (KeyboardInterrupt, SystemExit): #pragma: no cover
             raise
         except:
             self.handleError(record)
@@ -871,7 +871,7 @@
                 smtp.login(self.username, self.password)
             smtp.sendmail(self.fromaddr, self.toaddrs, msg)
             smtp.quit()
-        except (KeyboardInterrupt, SystemExit):
+        except (KeyboardInterrupt, SystemExit): #pragma: no cover
             raise
         except:
             self.handleError(record)
@@ -958,7 +958,7 @@
                 type = self.getEventType(record)
                 msg = self.format(record)
                 self._welu.ReportEvent(self.appname, id, cat, type, [msg])
-            except (KeyboardInterrupt, SystemExit):
+            except (KeyboardInterrupt, SystemExit): #pragma: no cover
                 raise
             except:
                 self.handleError(record)
@@ -1043,7 +1043,7 @@
                 h.putheader('Authorization', s)
             h.endheaders(data if self.method == "POST" else None)
             h.getresponse()    #can't do anything with the result
-        except (KeyboardInterrupt, SystemExit):
+        except (KeyboardInterrupt, SystemExit): #pragma: no cover
             raise
         except:
             self.handleError(record)
@@ -1213,7 +1213,7 @@
         """
         try:
             self.enqueue(self.prepare(record))
-        except (KeyboardInterrupt, SystemExit):
+        except (KeyboardInterrupt, SystemExit): #pragma: no cover
             raise
         except:
             self.handleError(record)
diff --git a/Lib/test/test_logging.py b/Lib/test/test_logging.py
index c6efbe0..cad0ad7 100644
--- a/Lib/test/test_logging.py
+++ b/Lib/test/test_logging.py
@@ -351,6 +351,10 @@
         finally:
             handler.removeFilter(filterfunc)
 
+    def test_empty_filter(self):
+        f = logging.Filter()
+        r = logging.makeLogRecord({'name': 'spam.eggs'})
+        self.assertTrue(f.filter(r))
 
 #
 #   First, we define our levels. There can be as many as you want - the only
@@ -519,11 +523,22 @@
         h = TestStreamHandler(BadStream())
         r = logging.makeLogRecord({})
         old_raise = logging.raiseExceptions
+        old_stderr = sys.stderr
         try:
             h.handle(r)
             self.assertIs(h.error_record, r)
+            h = logging.StreamHandler(BadStream())
+            sys.stderr = sio = io.StringIO()
+            h.handle(r)
+            self.assertTrue('\nRuntimeError: '
+                            'deliberate mistake\n' in sio.getvalue())
+            logging.raiseExceptions = False
+            sys.stderr = sio = io.StringIO()
+            h.handle(r)
+            self.assertEqual('', sio.getvalue())
         finally:
             logging.raiseExceptions = old_raise
+            sys.stderr = old_stderr
 
 class MemoryHandlerTest(BaseTest):
 
@@ -2237,6 +2252,34 @@
         f = logging.Formatter('%(asctime)s %(message)s')
         self.assertEqual(f.formatTime(r), '1993-04-21 08:03:00,123')
         self.assertEqual(f.formatTime(r, '%Y:%d'), '1993:21')
+        f.format(r)
+        self.assertEqual(r.asctime, '1993-04-21 08:03:00,123')
+
+class TestBufferingFormatter(logging.BufferingFormatter):
+    def formatHeader(self, records):
+        return '[(%d)' % len(records)
+
+    def formatFooter(self, records):
+        return '(%d)]' % len(records)
+
+class BufferingFormatterTest(unittest.TestCase):
+    def setUp(self):
+        self.records = [
+            logging.makeLogRecord({'msg': 'one'}),
+            logging.makeLogRecord({'msg': 'two'}),
+        ]
+
+    def test_default(self):
+        f = logging.BufferingFormatter()
+        self.assertEqual('', f.format([]))
+        self.assertEqual('onetwo', f.format(self.records))
+
+    def test_custom(self):
+        f = TestBufferingFormatter()
+        self.assertEqual('[(2)onetwo(2)]', f.format(self.records))
+        lf = logging.Formatter('<%(message)s>')
+        f = TestBufferingFormatter(lf)
+        self.assertEqual('[(2)<one><two>(2)]', f.format(self.records))
 
 class ExceptionTest(BaseTest):
     def test_formatting(self):
@@ -2957,7 +3000,7 @@
                  CustomLevelsAndFiltersTest, HandlerTest, MemoryHandlerTest,
                  ConfigFileTest, SocketHandlerTest, MemoryTest,
                  EncodingTest, WarningsTest, ConfigDictTest, ManagerTest,
-                 FormatterTest, StreamHandlerTest,
+                 FormatterTest, BufferingFormatterTest, StreamHandlerTest,
                  LogRecordFactoryTest, ChildLoggerTest, QueueHandlerTest,
                  ShutdownTest, ModuleLevelMiscTest, BasicConfigTest,
                  LoggerAdapterTest, LoggerTest,