Message 401000 - Python tracker

Message401000

Author	brandtbucher
Recipients	FFY00, brandtbucher, gvanrossum, jefferyto, lukasz.langa, methane, obfusk, pablogsal, rhettinger, serhiy.storchaka, vstinner
Date	2021-09-03.15:55:17
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1630684517.65.0.143444654095.issue37596@roundup.psfhosted.org>
In-reply-to

Content
I'm compiling Clang now to try to reproduce using a UBSan build (I'm on Ubuntu, though). I'm not entirely familiar with how these sanitizer builds work... could the implication be that we're hitting undefined behavior at some point? Or is it just a red herring? Note also that the "set([float('nan'), b'a', b'b', b'c', 'x', 'y', 'z'])" and "frozenset([float('nan'), b'a', b'b', b'c', 'x', 'y', 'z'])" tests seem to be working just fine... meaning their ordering on this buildbot is different under PYTHONHASHSEEDs 0 and 1 (as expected). It may still be a platform-or-configuration-dependent ordering, though. Raymond: off the top of your head, are there any obvious reasons this could be happening?

Content

I'm compiling Clang now to try to reproduce using a UBSan build (I'm on Ubuntu, though).

I'm not entirely familiar with how these sanitizer builds work... could the implication be that we're hitting undefined behavior at some point? Or is it just a red herring?

Note also that the "set([float('nan'), b'a', b'b', b'c', 'x', 'y', 'z'])" and "frozenset([float('nan'), b'a', b'b', b'c', 'x', 'y', 'z'])" tests seem to be working just fine... meaning their ordering on this buildbot is different under PYTHONHASHSEEDs 0 and 1 (as expected). It may still be a platform-or-configuration-dependent ordering, though.

Raymond: off the top of your head, are there any obvious reasons this could be happening?

History
Date	User	Action	Args
2021-09-03 15:55:17	brandtbucher	set	recipients: + brandtbucher, gvanrossum, rhettinger, vstinner, methane, lukasz.langa, serhiy.storchaka, pablogsal, FFY00, jefferyto, obfusk
2021-09-03 15:55:17	brandtbucher	set	messageid: <1630684517.65.0.143444654095.issue37596@roundup.psfhosted.org>
2021-09-03 15:55:17	brandtbucher	link	issue37596 messages
2021-09-03 15:55:17	brandtbucher	create