Patch by Tim Peters fixing PR#89:

long(+/- infinity) returns nonsense.

diff --git a/Objects/longobject.c b/Objects/longobject.c
index 7c805a5259f6d817ce251a56dd90bc4ec30abeb8..9f605a1470ea59c4993ee6c383e9e93247b27020 100644 (file)
--- a/Objects/longobject.c
+++ b/Objects/longobject.c
@@ -145,6 +145,11 @@ PyLong_FromDouble(dval)
        double frac;
        int i, ndig, expo, neg;
        neg = 0;
+       if (dval && dval * 0.5 == dval) {
+               PyErr_SetString(PyExc_OverflowError,
+                       "cannot convert float infinity to long");
+               return NULL;
+       }
        if (dval < 0.0) {
                neg = 1;
                dval = -dval;