Don't raise InvalidLog

because there's nothing you can do about it anyways, so there's no need
to stop.

tsstats/client.py

@@ -4,8 +4,6 @@ import datetime
 import logging
 from collections import MutableMapping
 
-from tsstats.exceptions import InvalidLog
-
 logger = logging.getLogger('tsstats')
 
 
@@ -102,7 +100,7 @@ class Client(object):
         logger.debug('[%s] DISCONNECT %s', timestamp, self)
         if not self.connected:
             logger.debug('^ disconnect before connect')
-            raise InvalidLog('disconnect before connect!')
+            return
         self.connected -= 1
         session_time = timestamp - self._last_connect
         logger.debug('Session lasted %s', session_time)

tsstats/exceptions.py

@@ -5,11 +5,3 @@ class InvalidConfiguration(Exception):
     '''
     The configuration is invalid (either config-file or cli-args)
     '''
-
-
-class InvalidLog(Exception):
-    '''
-    Something impossible appeared at the logs,
-    for example a disconnect before a connect
-    '''
-    pass

tsstats/tests/res/test.log.broken

@@ -1,3 +0,0 @@
-2016-06-18 14:22:12.161100|INFO    |VirtualServer|   1| listening on 0.0.0.0:9987
-2015-05-18 16:00:14.951191|INFO    |VirtualServerBase|  3| client disconnected 'Client1'(id:1) reason 'reasonmsg=ByeBye!'
-2015-05-18 15:55:23.456679|INFO    |VirtualServerBase|  3| client connected 'Client1'(id:1) from 1.2.3.4:1234

tsstats/tests/test_log.py

@@ -1,7 +1,6 @@
 import pendulum
 import pytest
 
-from tsstats.exceptions import InvalidLog
 from tsstats.log import TimedLog, _bundle_logs, _parse_details, parse_logs
 from tsstats.template import render_servers
 
@@ -74,11 +73,6 @@ def test_log_bundle(logs, bundled):
     assert _bundle_logs(logs) == bundled
 
 
-def test_log_invalid():
-    with pytest.raises(InvalidLog):
-        _parse_details('tsstats/tests/res/test.log.broken')
-
-
 def test_log_client_online():
     current_time = pendulum.now()