Issue #789290: make sure that hash(2**63) == hash(2.**63) on 64-bit
platforms. The previous code was fragile, depending on the twin
accidents that:
(1) in C, casting the double value 2.**63 to long returns the integer
value -2**63, and
(2) in Python, hash(-2**63) == hash(2**63).
There's already a test for this in test_hash.
diff --git a/Objects/object.c b/Objects/object.c
index ba736a9..9108fd4 100644
--- a/Objects/object.c
+++ b/Objects/object.c
@@ -1028,7 +1028,7 @@
fractpart = modf(v, &intpart);
if (fractpart == 0.0) {
/* This must return the same hash as an equal int or long. */
- if (intpart > LONG_MAX || -intpart > LONG_MAX) {
+ if (intpart > LONG_MAX/2 || -intpart > LONG_MAX/2) {
/* Convert to long and use its hash. */
PyObject *plong; /* converted to Python long */
if (Py_IS_INFINITY(intpart))