folkert@msi:~/Projects/feeks/trunk$ pypy3 -m pip install python-chess
Defaulting to user installation because normal site-packages is not writeable
Collecting python-chess
  Using cached python_chess-0.30.1-py3-none-any.whl (128 kB)
Installing collected packages: python-chess
RPython traceback:
  File "pypy_objspace_std.c", line 47233, in _string_to_int_or_long
  File "rpython_rlib_1.c", line 34167, in parse_string_from_binary_base
  File "rpython_rlib_2.c", line 40880, in NumberStringParser_prev_digit
Fatal RPython error: AssertionError
Aborted (core dumped)