Win10 FFIError: multiple declarations of function Salsa20_8_core (for interactive usage, try cdef(xx, override=True))

[QGB]

In [435]: from Crypto.Protocol.KDF import scrypt
---------------------------------------------------------------------------
FFIError                                  Traceback (most recent call last)
<ipython-input-435-dea27a2b3051> in <module>
----> 1 from Crypto.Protocol.KDF import scrypt

C:\QGB\Anaconda3\lib\site-packages\Crypto\Protocol\KDF.py in <module>
     43                     int Salsa20_8_core(const uint8_t *x, const uint8_t *y,
     44                                        uint8_t *out);
---> 45                     """)
     46
     47 _raw_scrypt_lib = load_pycryptodome_raw_lib("Cryptodome.Protocol._scrypt",

C:\QGB\Anaconda3\lib\site-packages\Cryptodome\Util\_raw_api.py in load_pycryptodome_raw_lib(name, cdecl)
    304                 attempts.append("Not found '%s'" % filename)
    305                 continue
--> 306             return load_lib(full_name, cdecl)
    307         except OSError as exp:
    308             attempts.append("Cannot load '%s': %s" % (filename, str(exp)))

C:\QGB\Anaconda3\lib\site-packages\Cryptodome\Util\_raw_api.py in load_lib(name, cdecl)
     98         else:
     99             lib = ffi.dlopen(name)
--> 100         ffi.cdef(cdecl)
    101         return lib
    102

C:\QGB\Anaconda3\lib\site-packages\cffi\api.py in cdef(self, csource, override, packed, pack)
    110         packed=True).
    111         """
--> 112         self._cdef(csource, override=override, packed=packed, pack=pack)
    113
    114     def embedding_api(self, csource, packed=False, pack=None):

C:\QGB\Anaconda3\lib\site-packages\cffi\api.py in _cdef(self, csource, override, **options)
    124         with self._lock:
    125             self._cdef_version = object()
--> 126             self._parser.parse(csource, override=override, **options)
    127             self._cdefsources.append(csource)
    128             if override:

C:\QGB\Anaconda3\lib\site-packages\cffi\cparser.py in parse(self, csource, override, packed, pack, dllexport)
    356                              'packed': pack,
    357                              'dllexport': dllexport}
--> 358             self._internal_parse(csource)
    359         finally:
    360             self._options = prev_options

C:\QGB\Anaconda3\lib\site-packages\cffi\cparser.py in _internal_parse(self, csource)
    379                 current_decl = decl
    380                 if isinstance(decl, pycparser.c_ast.Decl):
--> 381                     self._parse_decl(decl)
    382                 elif isinstance(decl, pycparser.c_ast.Typedef):
    383                     if not decl.name:

C:\QGB\Anaconda3\lib\site-packages\cffi\cparser.py in _parse_decl(self, decl)
    471             tp, quals = self._get_type_and_quals(node, name=decl.name)
    472             assert isinstance(tp, model.RawFunctionType)
--> 473             self._declare_function(tp, quals, decl)
    474         else:
    475             if isinstance(node, pycparser.c_ast.Struct):

C:\QGB\Anaconda3\lib\site-packages\cffi\cparser.py in _declare_function(self, tp, quals, decl)
    464         else:
    465             tag = 'function '
--> 466         self._declare(tag + decl.name, tp)
    467
    468     def _parse_decl(self, decl):

C:\QGB\Anaconda3\lib\site-packages\cffi\cparser.py in _declare(self, name, obj, included, quals)
    536                 raise FFIError(
    537                     "multiple declarations of %s (for interactive usage, "
--> 538                     "try cdef(xx, override=True))" % (name,))
    539         assert '__dotdotdot__' not in name.split()
    540         self._declarations[name] = (obj, quals)

FFIError: multiple declarations of function Salsa20_8_core (for interactive usage, try cdef(xx, override=True))

In [436]: Crypto.__version__
Out[436]: '3.15.0'