conflict with cython default branch

[tacaswell]

With the current (3.0.0b3-16-g03c498d31) cython default branch compliin fails with:

      Error compiling Cython file:
      ------------------------------------------------------------
      ...
          cdef readonly object func
          cdef readonly tuple args
          cdef readonly dict keywords
          cdef public object __doc__
          cdef public object __name__
          cdef public object __qualname__
                             ^
      ------------------------------------------------------------

      cytoolz/functoolz.pxd:18:23: '__qualname__' redeclared

      Error compiling Cython file:
      ------------------------------------------------------------
      ...
          cdef readonly object func
          cdef readonly tuple args
          cdef readonly dict keywords
          cdef public object __doc__
          cdef public object __name__
          cdef public object __qualname__
               ^
      ------------------------------------------------------------

      cytoolz/functoolz.pxd:18:9: Compiler crash in AnalyseDeclarationsTransform

      File 'ModuleNode.py', line 203, in analyse_declarations: ModuleNode(functoolz.pxd:1:0,
          full_module_name = 'cytoolz.functoolz',
          is_pxd = True)
      File 'Nodes.py', line 393, in analyse_declarations: StatListNode(functoolz.pxd:1:0)
      File 'Nodes.py', line 5425, in analyse_declarations: CClassDefNode(functoolz.pxd:10:5,
          as_name = 'curry',
          class_name = 'curry',
          in_pxd = True,
          module_name = '',
          punycode_class_name = 'curry',
          visibility = 'private')
      File 'Nodes.py', line 393, in analyse_declarations: StatListNode(functoolz.pxd:11:4)
      File 'Nodes.py', line 1529, in analyse_declarations: CVarDefNode(functoolz.pxd:18:9,
          in_pxd = True,
          modifiers = [...]/0,
          visibility = 'public')

      Compiler crash traceback from this point on:
        File "/home/tcaswell/.virtualenvs/bleeding/lib/python3.13/site-packages/Cython/Compiler/Nodes.py", line 1529, in analyse_declarations
          self.entry = dest_scope.declare_var(
                       ^^^^^^^^^^^^^^^^^^^^^^^
        File "/home/tcaswell/.virtualenvs/bleeding/lib/python3.13/site-packages/Cython/Compiler/Symtab.py", line 2386, in declare_var
          entry = self.declare(name, cname, type, pos, visibility)
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/home/tcaswell/.virtualenvs/bleeding/lib/python3.13/site-packages/Cython/Compiler/Symtab.py", line 548, in declare
          entries[name].already_declared_here()
        File "/home/tcaswell/.virtualenvs/bleeding/lib/python3.13/site-packages/Cython/Compiler/Symtab.py", line 260, in already_declared_here
          error(self.pos, "Previous declaration is here")
        File "/home/tcaswell/.virtualenvs/bleeding/lib/python3.13/site-packages/Cython/Compiler/Errors.py", line 178, in error
          raise InternalError(message)

The following patch "fixes the build"

diff --git a/cytoolz/functoolz.pxd b/cytoolz/functoolz.pxd
index da203c1..c0dc62a 100644
--- a/cytoolz/functoolz.pxd
+++ b/cytoolz/functoolz.pxd
@@ -15,8 +15,6 @@ cdef class curry:
     cdef readonly dict keywords
     cdef public object __doc__
     cdef public object __name__
-    cdef public object __module__
-    cdef public object __qualname__

 cpdef object memoize(object func, object cache=*, object key=*)

but leaves functools broken:

______________________________________________________________________ ERROR collecting cytoolz/tests/dev_skip_test.py _______________________________________________________________________
../../../../.virtualenvs/bleeding/lib/python3.13/site-packages/_pytest/runner.py:341: in from_call
    result: Optional[TResult] = func()
../../../../.virtualenvs/bleeding/lib/python3.13/site-packages/_pytest/runner.py:372: in <lambda>
    call = CallInfo.from_call(lambda: list(collector.collect()), "collect")
../../../../.virtualenvs/bleeding/lib/python3.13/site-packages/_pytest/python.py:532: in collect
    self._inject_setup_module_fixture()
../../../../.virtualenvs/bleeding/lib/python3.13/site-packages/_pytest/python.py:546: in _inject_setup_module_fixture
    self.obj, ("setUpModule", "setup_module")
../../../../.virtualenvs/bleeding/lib/python3.13/site-packages/_pytest/python.py:311: in obj
    self._obj = obj = self._getobj()
../../../../.virtualenvs/bleeding/lib/python3.13/site-packages/_pytest/python.py:529: in _getobj
    return self._importtestmodule()
../../../../.virtualenvs/bleeding/lib/python3.13/site-packages/_pytest/python.py:618: in _importtestmodule
    mod = import_path(self.path, mode=importmode, root=self.config.rootpath)
../../../../.virtualenvs/bleeding/lib/python3.13/site-packages/_pytest/pathlib.py:565: in import_path
    importlib.import_module(module_name)
../../../../.pybuild/bleeding/lib/python3.13/importlib/__init__.py:90: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:1293: in _gcd_import
    ???
<frozen importlib._bootstrap>:1266: in _find_and_load
    ???
<frozen importlib._bootstrap>:1237: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:841: in _load_unlocked
    ???
../../../../.virtualenvs/bleeding/lib/python3.13/site-packages/_pytest/assertion/rewrite.py:172: in exec_module
    exec(co, module.__dict__)
cytoolz/tests/dev_skip_test.py:13: in <module>
    import cytoolz
../../../../.virtualenvs/bleeding/lib/python3.13/site-packages/cytoolz/__init__.py:19: in <module>
    flip = functoolz.flip = curry(functoolz.flip)
cytoolz/functoolz.pyx:214: in cytoolz.functoolz.curry.__cinit__
    self.__module__ = getattr(func, '__module__', None)
E   AttributeError: 'cytoolz.functoolz.curry' object has no attribute '__module__'

(a bunch of versions of that).

[tacaswell]

I'm not sure if this is a cython regression or an intended change that cytoolz will have to deal with.

[eriknw]

Thanks for the report! I'll look into a fix (since Cython 3.0 is immenent).

Perhaps we should add a CI scheduled job to run against upstream Cython.

[jrbourbeau]

We now have a CI build that uses cython 3. I'm going to close this issue as resolved but feel free to re-open if this is still an issue.