#419 won't build: lvalue required as increment operand

[draeath]

I am attempting to pip install some modules that require ruamel as a dependency. Build fails with the following (similar errors in other places where the same syntax is used):

        ext/_ruamel_yaml.c: In function ‘__pyx_tp_dealloc_12_ruamel_yaml_CParser’:
        ext/_ruamel_yaml.c:23877:5: error: lvalue required as increment operand
        23877 |     ++Py_REFCNT(o);
              |     ^~
        ext/_ruamel_yaml.c:23879:5: error: lvalue required as decrement operand
        23879 |     --Py_REFCNT(o);
              |     ^~
        ext/_ruamel_yaml.c: In function ‘__pyx_tp_dealloc_12_ruamel_yaml_CEmitter’:
        ext/_ruamel_yaml.c:24050:5: error: lvalue required as increment operand
        24050 |     ++Py_REFCNT(o);
              |     ^~
        ext/_ruamel_yaml.c:24052:5: error: lvalue required as decrement operand
        24052 |     --Py_REFCNT(o);
              |     ^~

pip is grabbing ruamel.yaml-0.15.100.tar.gz. Python 3.10.2 on RHEL 7.9 x86_64 using devtoolset-10:

$ gcc --version
gcc (GCC) 10.2.1 20210130 (Red Hat 10.2.1-11)

[draeath]

pip install output with build warnings/errors

[Anthon van der Neut]

You don't explain why you use ruamel.yaml 0.15.100, which was released more than two full years before the first 3.10 release, and even before the first 3.8 release. I hope you realise the Python C binding do change over time, requiring updates to C and/or Cython code or at least some regeneration with a newer Cython version.

But even if you don't https://pypi.org/project/ruamel.yaml/0.15.100/ clearly states (on the left under Programming Languaages) what are the compatbile Python versions..

[draeath]

Perhaps you should yell at Amazon, because it's their package that is pulling that version as a dependency (via AWS CLI v2). Or one of their dependencies.

[draeath]

I've filed a bug with them, since this does seem to be their issue. I appreciate the response (though not necessarily the tone, thanks for that).

Here's that report if you're interested or curious. It links back here.