Xpra: Ticket #1780: Traceback when attaching

My client and server are Fedora 26 machines running trunk r18658.

The server was started with xpra start :13 --bind-tcp= --start-new-commands=yes --start-child=xterm --start-via-proxy=no --systemd-run=no --no-daemon. Attempting to attach fails with this traceback:

Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/xpra/client/client_base.py", line 731, in _process_hello
    if not self.server_connection_established():
  File "/usr/lib64/python2.7/site-packages/xpra/client/ui_client_base.py", line 279, in server_connection_established
    if not XpraClientBase.server_connection_established(self):
  File "/usr/lib64/python2.7/site-packages/xpra/client/client_base.py", line 749, in server_connection_established
    if not self.parse_server_capabilities():
  File "/usr/lib64/python2.7/site-packages/xpra/client/ui_client_base.py", line 288, in parse_server_capabilities
    if not c.parse_server_capabilities(self):
  File "/usr/lib64/python2.7/site-packages/xpra/client/client_base.py", line 768, in parse_server_capabilities
    self.server_client_shutdown = c.boolget("client-shutdown", True)
AttributeError: type object 'FilePrintMixin' has no attribute 'boolget'
2018-03-01 10:16:40,996 error processing hello packet from server: type object 'FilePrintMixin' has no attribute 'boolget'
2018-03-01 10:16:41,006 Connection lost

Thu, 01 Mar 2018 19:20:34 GMT - Antoine Martin: status changed; resolution set

Caused by r18659, fixed in r18660.

Sat, 23 Jan 2021 05:33:35 GMT - migration script:

this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/1780