Pacemaker "pcs cluster config" or "pcs config show" fail or report warnings reporting missing node names

Issue

Executing the pcs cluster config command returns the below python exception, reflecting an issue with the node list generated from the corosync.conf file:

$ pcs cluster config
Traceback (most recent call last):
  File "/usr/sbin/pcs", line 11, in <module>
    load_entry_point('pcs==0.10.8', 'console_scripts', 'pcs')()
  File "/usr/lib/python3.6/site-packages/pcs/app.py", line 277, in main
    utils.get_library_wrapper(), argv, utils.get_input_modifiers()
  File "/usr/lib/python3.6/site-packages/pcs/cli/common/routing.py", line 33, in _router
    return cmd_map[sub_cmd](lib, argv_next, modifiers)
  File "/usr/lib/python3.6/site-packages/pcs/cli/common/routing.py", line 33, in _router
    return cmd_map[sub_cmd](lib, argv_next, modifiers)
  File "/usr/lib/python3.6/site-packages/pcs/cli/common/routing.py", line 33, in _router
    return cmd_map[sub_cmd](lib, argv_next, modifiers)
  File "/usr/lib/python3.6/site-packages/pcs/cluster.py", line 1919, in config_show
    output = "\n".join(_config_get_text(corosync_conf_dto))
  File "/usr/lib/python3.6/site-packages/pcs/cluster.py", line 1928, in _config_get_text
    lines.extend(_format_nodes(corosync_conf.nodes))
  File "/usr/lib/python3.6/site-packages/pcs/cluster.py", line 1879, in _format_nodes
    for node in sorted(nodes, key=lambda node: node.name):
TypeError: '<' not supported between instances of 'NoneType' and 'NoneType'

Commands like pcs config show may additionally report a warning message:

$ pcs config show
Cluster Name: cluster-rhel8
Warning: Some nodes are missing names in corosync.conf, those nodes were omitted <---