Python/pytime.c:297:10: warning: implicit conversion from 'long' to 'double' changes value from 9223372036854775807 to 9223372036854775808 [-Wimplicit-int-float-conversion]
    if (!_Py_InIntegralTypeRange(time_t, intpart)) {
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./Include/internal/pycore_pymath.h:72:45: note: expanded from macro '_Py_InIntegralTypeRange'
    (_Py_IntegralTypeMin(type) <= v && v <= _Py_IntegralTypeMax(type))
                                         ~~ ^~~~~~~~~~~~~~~~~~~~~~~~~
./Include/internal/pycore_pymath.h:61:88: note: expanded from macro '_Py_IntegralTypeMax'
    (_Py_IS_TYPE_SIGNED(type) ? (((((type)1 << (sizeof(type)*CHAR_BIT - 2)) - 1) << 1) + 1) : ~(type)0)
                                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
Python/pytime.c:352:14: warning: implicit conversion from 'long' to 'double' changes value from 9223372036854775807 to 9223372036854775808 [-Wimplicit-int-float-conversion]
        if (!_Py_InIntegralTypeRange(time_t, intpart)) {
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./Include/internal/pycore_pymath.h:72:45: note: expanded from macro '_Py_InIntegralTypeRange'
    (_Py_IntegralTypeMin(type) <= v && v <= _Py_IntegralTypeMax(type))
                                         ~~ ^~~~~~~~~~~~~~~~~~~~~~~~~
./Include/internal/pycore_pymath.h:61:88: note: expanded from macro '_Py_IntegralTypeMax'
    (_Py_IS_TYPE_SIGNED(type) ? (((((type)1 << (sizeof(type)*CHAR_BIT - 2)) - 1) << 1) + 1) : ~(type)0)
                                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
Python/pytime.c:518:10: warning: implicit conversion from 'long' to 'double' changes value from 9223372036854775807 to 9223372036854775808 [-Wimplicit-int-float-conversion]
    if (!_Py_InIntegralTypeRange(_PyTime_t, d)) {
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./Include/internal/pycore_pymath.h:72:45: note: expanded from macro '_Py_InIntegralTypeRange'
    (_Py_IntegralTypeMin(type) <= v && v <= _Py_IntegralTypeMax(type))
                                         ~~ ^~~~~~~~~~~~~~~~~~~~~~~~~
./Include/internal/pycore_pymath.h:61:88: note: expanded from macro '_Py_IntegralTypeMax'
    (_Py_IS_TYPE_SIGNED(type) ? (((((type)1 << (sizeof(type)*CHAR_BIT - 2)) - 1) << 1) + 1) : ~(type)0)
                                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
3 warnings generated.