https://tools.taskcluster.net/groups/Jy8T2uoEQomPD1Be_KXZtQ/tasks/PJMdMd7OTruiHcm2R87z7w/runs/0/logs/public%2Flogs%2Flive.log

[task 2019-02-02T12:33:44.271Z] Traceback (most recent call last):
[task 2019-02-02T12:33:44.271Z]   File "/builds/worker/checkouts/gecko/taskcluster/mach_commands.py", line 262, in action_callback
[task 2019-02-02T12:33:44.271Z]     test=False)
[task 2019-02-02T12:33:44.271Z]   File "/builds/worker/checkouts/gecko/taskcluster/taskgraph/actions/registry.py", line 359, in trigger_action_callback
[task 2019-02-02T12:33:44.271Z]     sanity_check_task_scope(callback, parameters, graph_config)
[task 2019-02-02T12:33:44.271Z]   File "/builds/worker/checkouts/gecko/taskcluster/taskgraph/actions/registry.py", line 337, in sanity_check_task_scope
[task 2019-02-02T12:33:44.271Z]     if expected_scope not in taskcluster.get_current_scopes():
[task 2019-02-02T12:33:44.271Z]   File "/builds/worker/checkouts/gecko/taskcluster/taskgraph/util/taskcluster.py", line 248, in get_current_scopes
[task 2019-02-02T12:33:44.271Z]     auth_url = liburls.api(get_root_url(use_proxy=True), 'auth', 'v1', 'scopes/current')
[task 2019-02-02T12:33:44.271Z] TypeError: __call__() got an unexpected keyword argument 'use_proxy'

(this occurred on autoland)

Huh, memoize (get_root_url is memoized) doesn't accept keyword arguments. How did this ever work??

Ah! This is an autoland push from a branch that contained the patches from bug 1508381, somehow. That patch still can't land (it's waiting on changes to the workers) but this helpfully identified another bug in that push which I will fix before re-landing.