Change long/long true division to return as many good bits as it can;

e.g., (1L << 40000)/(1L << 40001) returns 0.5, not Inf or NaN or whatever.

1 files changed, 8 insertions, 1 deletions

diff --git a/Objects/intobject.c b/Objects/intobject.c
index 775213c..73d5e77 100644
--- a/Objects/intobject.c
+++ b/Objects/intobject.c
@@ -535,7 +535,14 @@ int_classic_div(PyIntObject *x, PyIntObject *y)
 static PyObject *
 int_true_divide(PyObject *v, PyObject *w)
 {
-	return PyFloat_Type.tp_as_number->nb_true_divide(v, w);
+	/* If they aren't both ints, give someone else a chance.  In
+	   particular, this lets int/long get handled by longs, which
+	   underflows to 0 gracefully if the long is too big to convert
+	   to float. */
+	if (PyInt_Check(v) && PyInt_Check(w))
+		return PyFloat_Type.tp_as_number->nb_true_divide(v, w);
+	Py_INCREF(Py_NotImplemented);
+	return Py_NotImplemented;
 }
 
 static PyObject *