Bug report

Bug description:

Right now we do this after invocation of the function or it's optimized alternative (for small integers). That has advantage as - IIUC - both algorithms may trigger error condition. On another hand, behaviour of the public C API function _Py_c_pow() (used in the CPython codebase only for complex_pow()) will differ from the pure-python pow()...

Other similar functions (complex_div() and complex_abs()) leave setting errno to corresponding C-API function.

My proposal: move _Py_ADJUST_ERANGE2() call to _Py_c_pow() and c_powi(). If that does make sense I'll provide a patch.

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

• gh-119771: adjust errno on overflows in _Py_c_pow() #120256