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Issue #27066: Fixed SystemError if a custom opener (for open()) returns

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a negative number without setting an exception.
This commit is contained in:
Barry Warsaw 2016-06-08 17:47:26 -04:00
parent fda4d67842
commit 480e28538d
3 changed files with 25 additions and 1 deletions
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7
Modules/_io/fileio.c
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@ -421,7 +421,12 @@ _io_FileIO___init___impl(fileio *self, PyObject *nameobj, const char *mode,
self->fd = _PyLong_AsInt(fdobj);
Py_DECREF(fdobj);
if (self->fd == -1) {
if (self->fd < 0) {
if (!PyErr_Occurred()) {
/* The opener returned -1. See issue #27066 */
PyErr_Format(PyExc_ValueError,
"opener returned %d", self->fd);
}
goto error;
}
}