Attempt to debug None socket errors

printrun/printcore.py

@@ -584,7 +584,11 @@ class printcore():
                 if self.printer_tcp: self.printer.flush()
                 self.writefailures = 0
             except socket.error as e:
-                self.logError(_(u"Can't write to printer (disconnected?) (Socket error {0}): {1}").format(e.errno, decode_utf8(e.strerror)))
+                if e is None:
+                    self.logError("Can't write to printer (disconnected ?):" +
+                                  "\n" + traceback.format_exc())
+                else:
+                    self.logError(_(u"Can't write to printer (disconnected?) (Socket error {0}): {1}").format(e.errno, decode_utf8(e.strerror)))
                 self.writefailures += 1
             except SerialException as e:
                 self.logError(_(u"Can't write to printer (disconnected?) (SerialException): {0}").format(decode_utf8(str(e))))