[Stackless] Windows 2.7.6 stability

Anselm Kruis a.kruis at science-computing.de
Mon Feb 3 19:33:42 CET 2014

Could it be related to the PGO optimised build?
As far as I know, the mainline python installer is build without PGO.
Our installer is build with PGO optimisation.

Another question: can you try our 2.7.5 build? It is PGO optimized too.


Am 03.02.2014 12:13, schrieb Kristján Valur Jónsson:
> Hi.
> Do you get this only with the installed version?
> Could you try replacing it with your own build?  If so, could you go into the source code and disable stack spilling ?
> You have to nerf the macro CSTACK_SAVE_NOW.
> I saw some mysterious crashes recently in a live build in Shanghai that went away when I disabled this.
> K
>> -----Original Message-----
>> From: stackless-bounces at stackless.com [mailto:stackless-
>> bounces at stackless.com] On Behalf Of Richard Tew
>> Sent: 3. febrúar 2014 03:04
>> To: stackless at stackless.com
>> Subject: [Stackless] Windows 2.7.6 stability
>> Hi,
>> I've got the installer we provide for 2.7.6, on Windows.  And I've been getting
>> lots of non-crashing premature exits:
>> SystemError: unknown opcode
>> XXX lineno: 314, opcode: 0
>> It's not consistently reproducible using running the same code, but can be
>> sometimes, and I'm not using any Stackless features.
>> If I take the mainline python repo and sync to v2.7.6 and generate a dll, and
>> put it in c:\python27, all the problems go away.
>> I thought it might be pyside 1.1.2 which I was using, but upgraded that and
>> the problem remained with pyside 1.2.1.  That's the only external
>> dependency my code uses.
>> Anyone else using this installer?
>> Cheers,
>> Richard.
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