$ mach install-moz-phab
Error running mach:

    ['install-moz-phab']

The error occurred in code that was called by the mach command. This is either
a bug in the called code itself or in the way that mach is calling it.
You can invoke |./mach busted| to check if this issue is already on file. If it
isn't, please use |./mach busted file install-moz-phab| 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
message.

The details of the failure are as follows:

TypeError: argument of type 'ExternalPythonSite' is not iterable

  File "c:\moz\mozilla-unified\tools/phabricator/mach_commands.py", line 47, in install_moz_phab
    "import sys; print(sys.prefix != sys.base_prefix)",
  File "c:\mozilla-build\python3\lib\subprocess.py", line 411, in check_output
    **kwargs).stdout
  File "c:\mozilla-build\python3\lib\subprocess.py", line 488, in run
    with Popen(*popenargs, **kwargs) as process:
  File "c:\mozilla-build\python3\lib\subprocess.py", line 800, in __init__
    restore_signals, start_new_session)
  File "c:\mozilla-build\python3\lib\subprocess.py", line 1148, in _execute_child
    args = list2cmdline(args)
  File "c:\mozilla-build\python3\lib\subprocess.py", line 555, in list2cmdline
    needquote = (" " in arg) or ("\t" in arg) or not arg

Assuming this has something to do with some of the recent changes?

The Bugbug bot thinks this bug should belong to the 'Firefox Build System::Mach Core' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Set release status flags based on info from the regressing bug 1717051

https://hg.mozilla.org/mozilla-central/rev/4646a47a3d42