sympy master CI job fails inside TypedSymbol

Job #567086 failed for 059de5fb:

  File "/builds/pycodegen/pystencils/pystencils/data_types.py", line 219, in __new__
    obj = TypedSymbol.__xnew_cached_(cls, *args, **kwds)
  File "/opt/conda/lib/python3.8/site-packages/sympy/core/cache.py", line 74, in wrapper
    retval = func(*args, **kwargs)
TypeError: __new_stage2__() missing 1 required positional argument: 'dtype'