sip & PyQt w/ Python 3.13a

[Scott Talbert]

Hi Phil,

I know it's early in the Python 3.13 dev cycle, but the Fedora folks have 
started working on building everything.  When trying to build PyQt5, we're 
seeing a RecursionError.  Any ideas about that?

Generating the QtCore .pyi file...
sip-build: An internal error occurred...
Traceback (most recent call last):
   File "/usr/bin/sip-build", line 8, in <module>
     sys.exit(main())
              ^^^^^^
   File "/usr/lib64/python3.13/site-packages/sipbuild/tools/build.py", line 
37, in main
     handle_exception(e)
   File "/usr/lib64/python3.13/site-packages/sipbuild/exceptions.py", line 
81, in handle_exception
     raise e
   File "/usr/lib64/python3.13/site-packages/sipbuild/tools/build.py", line 
34, in main
     project.build()
   File "/usr/lib64/python3.13/site-packages/sipbuild/project.py", line 
245, in build
     self.builder.build()
   File "/usr/lib64/python3.13/site-packages/sipbuild/builder.py", line 48, 
in build
     self._generate_bindings()
   File "/usr/lib64/python3.13/site-packages/sipbuild/builder.py", line 
280, in _generate_bindings
     buildable = bindings.generate()
                 ^^^^^^^^^^^^^^^^^^^
   File "/builddir/build/BUILD/PyQt5-5.15.9/project.py", line 619, in 
generate
     buildable = super().generate()
                 ^^^^^^^^^^^^^^^^^^
   File "/usr/lib64/python3.13/site-packages/sipbuild/bindings.py", line 
214, in generate
     output_pyi(spec, project, pyi_path)
   File 
"/usr/lib64/python3.13/site-packages/sipbuild/generator/outputs/pyi.py", 
line 53, in output_pyi
     _module(pf, spec, module)
   File 
"/usr/lib64/python3.13/site-packages/sipbuild/generator/outputs/pyi.py", 
line 132, in _module
     _class(pf, spec, module, klass, defined)
   File 
"/usr/lib64/python3.13/site-packages/sipbuild/generator/outputs/pyi.py", 
line 267, in _class
     _class(pf, spec, module, nested, defined, indent)
   File 
"/usr/lib64/python3.13/site-packages/sipbuild/generator/outputs/pyi.py", 
line 289, in _class
     _callable(pf, spec, module, member, klass.overloads,
   File 
"/usr/lib64/python3.13/site-packages/sipbuild/generator/outputs/pyi.py", 
line 485, in _callable
     _overload(pf, spec, module, overload, overloaded, first_overload,
   File 
"/usr/lib64/python3.13/site-packages/sipbuild/generator/outputs/pyi.py", 
line 575, in _overload
     signature = _python_signature(spec, module, py_signature, defined,
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File 
"/usr/lib64/python3.13/site-packages/sipbuild/generator/outputs/pyi.py", 
line 599, in _python_signature
     as_str = _argument(spec, module, arg, defined, arg_nr=arg_nr)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File 
"/usr/lib64/python3.13/site-packages/sipbuild/generator/outputs/pyi.py", 
line 676, in _argument
     s += _type(spec, module, arg, defined, out=out)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File 
"/usr/lib64/python3.13/site-packages/sipbuild/generator/outputs/pyi.py", 
line 710, in _type
     return ArgumentFormatter(spec, arg).as_type_hint(module, out, defined)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File 
"/usr/lib64/python3.13/site-packages/sipbuild/generator/outputs/formatters/argument.py", 
line 327, in as_type_hint
     s += TypeHintManager(self.spec).as_type_hint(hint, out, context,
          ^^^^^^^^^^^^^^^^^^^^^^^^^^
   File 
"/usr/lib64/python3.13/site-packages/sipbuild/generator/outputs/type_hints.py", 
line 107, in __new__
     manager = cls._spec_manager_map[spec]
               ~~~~~~~~~~~~~~~~~~~~~^^^^^^
   File "/usr/lib64/python3.13/weakref.py", line 415, in __getitem__
     return self.data[ref(key)]
            ~~~~~~~~~^^^^^^^^^^
   File "<string>", line 4, in __eq__
   File "<string>", line 4, in __eq__
   File "<string>", line 4, in __eq__
   [Previous line repeated 495 more times]
RecursionError: maximum recursion depth exceeded in comparison

Thanks,
Scott