$ ./mach settings
The error occurred in the implementation of the invoked mach command.
This should never occur and is likely a bug in the implementation of that
You can invoke |./mach busted| to check if this issue is already on file. If it
isn't, please use |./mach busted file settings| to report it. If |./mach busted| is
misbehaving, you can also inspect the dependencies of bug 1543241.
If filing a bug, please include the full output of mach, including this error
The details of the failure are as follows:
TypeError: 'ConfigSettings' object is not callable
File "/mnt/c/Users/Andrew/dev/mozilla-central/python/mach/mach/main.py", line 460, in _run
File "/mnt/c/Users/Andrew/dev/mozilla-central/python/mach/mach/registrar.py", line 103, in _run_command_handler
result = fn(**kwargs)