William@William-THINK MINGW64 ~/src/migen_mercury/baseboard
$ python3 baseboard.py
Traceback (most recent call last):
  File "baseboard.py", line 373, in <module>
    m.comb += ResetSignal().eq(0)
  File "C:/msys64/home/william/src/nmigen\nmigen\tools.py", line 52, in wrapper
    return f(*args, **kwargs)
  File "C:/msys64/home/william/src/nmigen\nmigen\compat\fhdl\module.py", line 32, in __iadd__
    self._cm._module._add_statement(assigns, domain=None, depth=0, compat_mode=True)
  File "C:/msys64/home/william/src/nmigen\nmigen\hdl\dsl.py", line 248, in _add_statement
    for signal in assign._lhs_signals():
  File "C:/msys64/home/william/src/nmigen\nmigen\hdl\ast.py", line 813, in _lhs_signals
    return self.lhs._lhs_signals()
  File "C:/msys64/home/william/src/nmigen\nmigen\hdl\ast.py", line 194, in _lhs_signals
    raise TypeError("Value {!r} cannot be used in assignments".format(self))
TypeError: Value (rst sync) cannot be used in assignments