Change IPC warnings to debug.

This seems to show up on Ubuntu Trusty (with older Qt) as well...

qutebrowser/misc/ipc.py

@@ -226,12 +226,7 @@ class IPCServer(QObject):
         """Raise SocketError on fatal errors."""
         if self._socket is None:
             # Sometimes this gets called from stale sockets.
-            msg = "In on_error with None socket!"
-            if os.name == 'nt':  # pragma: no cover
-                # This happens a lot on Windows, so we ignore it there.
-                log.ipc.debug(msg)
-            else:
-                log.ipc.warning(msg)
+            log.ipc.debug("In on_error with None socket!")
             return
         self._timer.stop()
         log.ipc.debug("Socket error {}: {}".format(
@@ -275,7 +270,7 @@ class IPCServer(QObject):
         log.ipc.debug("Client disconnected.")
         self._timer.stop()
         if self._socket is None:
-            log.ipc.warning("In on_disconnected with None socket!")
+            log.ipc.debug("In on_disconnected with None socket!")
         else:
             self._socket.deleteLater()
             self._socket = None

tests/unit/misc/test_ipc.py

@@ -615,21 +615,23 @@ def test_timeout(qtbot, caplog, qlocalsocket, ipc_server):
     assert caplog.records()[-1].message == "IPC connection timed out."
 
 
-@pytest.mark.parametrize('method, args', [
-    pytest.mark.posix(('on_error', [0])),
-    ('on_disconnected', []),
-    ('on_ready_read', []),
+@pytest.mark.parametrize('method, args, is_warning', [
+    pytest.mark.posix(('on_error', [0], False)),
+    ('on_disconnected', [], False),
+    ('on_ready_read', [], True),
 ])
-def test_ipcserver_socket_none(ipc_server, caplog, method, args):
+def test_ipcserver_socket_none(ipc_server, caplog, method, args, is_warning):
     func = getattr(ipc_server, method)
     assert ipc_server._socket is None
 
-    with caplog.atLevel(logging.WARNING):
+    if is_warning:
+        with caplog.atLevel(logging.WARNING):
+            func(*args)
+    else:
         func(*args)
 
-    records = caplog.records()
     msg = "In {} with None socket!".format(method)
-    assert records[-1].message == msg
+    assert msg in [r.message for r in caplog.records()]
 
 
 class TestSendOrListen: