[IronPython] Any idea what might cause this?

[Dino Viehland]

I would suggest enabling exception detail and getting the stack trace from there if you can.  The problem is probably a .NET list or a dict somewhere that we're both updating an iterating over at the same time.  But it's hard to know what list/dict that is without the stack trace.  But a full stack trace will lead us right to the problem and it should be easy to fix.

-----Original Message-----
From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Michael Foord
Sent: Monday, February 09, 2009 12:53 PM
To: Discussion of IronPython
Subject: Re: [IronPython] Any idea what might cause this?

Dan Eloff wrote:
> Hi IronPython team,
>
> Occasionally, when importing one particular module on a background
> thread I get this error:
>
> SystemError: Collection was modified; enumeration operation may not execute.
>
> The offending line is:
>
> class SerializeCustom(_custom_base):
>
> And _custom_base is defined earlier in the module as:
>
> from mycsharpassembly import *
> _custom_base = Serializers.SerializeCustom # from assembly
>
> The problem is a real pain to replicate (i.e. me refreshing the
> browser about 100 times) Hopefully someone will have an idea what
> could cause this. I'm using build 44619, main (2.1 now 2.6) branch.
>   

It looks like importing is still not thread safe - but I guess that bit 
is obvious. I'll leave it to Dino or Curt for a more in depth analysis. :-)

I wonder if a debug build of IronPython for Silverlight would get you 
more information.

Michael

> Thanks,
> -Dan
> _______________________________________________
> Users mailing list
> Users at lists.ironpython.com
> http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
>   


-- 
http://www.ironpythoninaction.com/
http://www.voidspace.org.uk/blog


_______________________________________________
Users mailing list
Users at lists.ironpython.com
http://lists.ironpython.com/listinfo.cgi/users-ironpython.com