Fixes #12637: Merged fix from 3.2 and added test.

Lib/logging/__init__.py

@@ -1442,7 +1442,8 @@ class Logger(Filterer):
                 c = c.parent
         if (found == 0):
             if lastResort:
-                lastResort.handle(record)
+                if record.levelno >= lastResort.level:
+                    lastResort.handle(record)
             elif raiseExceptions and not self.manager.emittedNoHandlerWarning:
                 sys.stderr.write("No handlers could be found for logger"
                                  " \"%s\"\n" % self.name)

Lib/test/test_logging.py

@@ -2923,6 +2923,8 @@ class LastResortTest(BaseTest):
         old_raise_exceptions = logging.raiseExceptions
         try:
             sys.stderr = sio = io.StringIO()
+            root.debug('This should not appear')
+            self.assertEqual(sio.getvalue(), '')
             root.warning('This is your final chance!')
             self.assertEqual(sio.getvalue(), 'This is your final chance!\n')
             #No handlers and no last resort, so 'No handlers' message