PyGILState_Release + Python2.3 = Segmentation Fault

[Kirill Simonov]

Hi,

Could someone tell me why my extension module works under Python 2.4, but 
fails with Segmentation Fault under Python 2.3? Here is the stripped version:

================================================
#include <Python.h>

static PyObject *
test_gil(PyObject *self)
{
    PyGILState_STATE gs;

    Py_BEGIN_ALLOW_THREADS

    gs = PyGILState_Ensure();

    PyGILState_Release(gs);

    Py_END_ALLOW_THREADS

    Py_INCREF(Py_None);
    return Py_None;
}

static PyMethodDef test_gil_methods[] = {
    {"test_gil", (PyCFunction)test_gil, METH_NOARGS},
    {NULL}
};

PyMODINIT_FUNC
init_test_gil(void) {
    (void)Py_InitModule("_test_gil", test_gil_methods);
}
===============================================

I've tested it with Debian Sid and Ubuntu Breezy.

Thanks,
Kirill