fix a crash in the MultiSocketServer startup and re-enable startup me…

…ssages

src/waitress/runner.py

@@ -16,13 +16,15 @@
 
 
 import getopt
+import logging
 import os
 import os.path
 import re
 import sys
 
 from waitress import serve
 from waitress.adjustments import Adjustments
+from waitress.utilities import logger
 
 HELP = """\
 Usage:
@@ -260,6 +262,12 @@ def run(argv=sys.argv, _serve=serve):
         show_help(sys.stderr, name, "Specify one application only")
         return 1
 
+    # set a default level for the logger only if it hasn't been set explicitly
+    # note that this level does not override any parent logger levels,
+    # handlers, etc but without it no log messages are emitted by default
+    if logger.level == logging.NOTSET:
+        logger.setLevel(logging.INFO)
+
     try:
         module, obj_name = match(args[0])
     except ValueError as exc:

src/waitress/server.py

@@ -125,10 +125,11 @@ def create_server(
         # In this case we have no need to use a MultiSocketServer
         return last_serv
 
+    log_info = last_serv.log_info
     # Return a class that has a utility function to print out the sockets it's
     # listening on, and has a .run() function. All of the TcpWSGIServers
     # registered themselves in the map above.
-    return MultiSocketServer(map, adj, effective_listen, dispatcher)
+    return MultiSocketServer(map, adj, effective_listen, dispatcher, log_info)
 
 
 # This class is only ever used if we have multiple listen sockets. It allows
@@ -143,11 +144,13 @@ def __init__(
         adj=None,
         effective_listen=None,
         dispatcher=None,
+        log_info=None,
     ):
         self.adj = adj
         self.map = map
         self.effective_listen = effective_listen
         self.task_dispatcher = dispatcher
+        self.log_info = log_info
 
     def print_listen(self, format_str):  # pragma: nocover
         for l in self.effective_listen:
@@ -344,7 +347,7 @@ def maintenance(self, now):
             if (not channel.requests) and channel.last_activity < cutoff:
                 channel.will_close = True
 
-    def print_listen(self, format_str):  # pragma: nocover
+    def print_listen(self, format_str):  # pragma: no cover
         self.log_info(format_str.format(self.effective_host, self.effective_port))
 
     def close(self):