From c96db47217030732db07f64414cc893a682cd92c Mon Sep 17 00:00:00 2001 From: Mark Dickinson Date: Sun, 8 Feb 2009 15:09:21 +0000 Subject: [PATCH] Merged revisions 69436 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r69436 | mark.dickinson | 2009-02-08 14:42:28 +0000 (Sun, 08 Feb 2009) | 10 lines 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. ........ --- Objects/object.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Objects/object.c b/Objects/object.c index e134691559e..ee18bc3c22e 100644 --- a/Objects/object.c +++ b/Objects/object.c @@ -655,7 +655,7 @@ _Py_HashDouble(double v) 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))