[issue32119] test_notify_all() of test_multiprocessing_forkserver failed on Python on x86 Tiger 3.6 with "ValueError: cannot convert float NaN to integer"

[STINNER Victor]

STINNER Victor <victor.stinner at gmail.com> added the comment:

"ValueError: cannot convert float NaN to integer": this error occurred on int(float), where the float comes from os.stat()

File "<frozen importlib._bootstrap_external>", line 762, in get_code

Lib/importlib/_bootstrap_external.py:

def get_code(self, fullname):
    ...
    st = self.path_stats(source_path)
    ...
    source_mtime = int(st['mtime']) <~~~~~~ HERE
    ...

def path_stats(self, path):
    st = _path_stat(path)
    return {'mtime': st.st_mtime, 'size': st.st_size}

def _path_stat(path):
    return _os.stat(path)

=> The float NaN comes from os.stat().st_mtime.


Implementation of os.stat().st_mtime in Modules/posixmodule.c:

static PyObject*
_pystat_fromstructstat(STRUCT_STAT *st)
{
    ...
#if defined(HAVE_STAT_TV_NSEC)
    ansec = st->st_atim.tv_nsec;
    mnsec = st->st_mtim.tv_nsec;
    cnsec = st->st_ctim.tv_nsec;
#elif defined(HAVE_STAT_TV_NSEC2)
    ansec = st->st_atimespec.tv_nsec;
    mnsec = st->st_mtimespec.tv_nsec;
    cnsec = st->st_ctimespec.tv_nsec;
#elif defined(HAVE_STAT_NSEC)
    ansec = st->st_atime_nsec;
    mnsec = st->st_mtime_nsec;
    cnsec = st->st_ctime_nsec;
#else
    ansec = mnsec = cnsec = 0;
#endif
    fill_time(v, 7, st->st_atime, ansec);
    fill_time(v, 8, st->st_mtime, mnsec);
    fill_time(v, 9, st->st_ctime, cnsec);
    ...
}

static void
fill_time(PyObject *v, int index, time_t sec, unsigned long nsec)
{
    ...
    float_s = PyFloat_FromDouble(sec + 1e-9*nsec);  <~~~~~~ HERE
    ...
    PyStructSequence_SET_ITEM(v, index+3, float_s);
    ...
}


Extract of the ./configure script output:

checking for tv_nsec in struct stat... no
checking for tv_nsec2 in struct stat... yes

=> configure defines HAVE_STAT_TV_NSEC2


We need sec and nsec values from fill_time() to debug this issue.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32119>
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