[Python-Dev] should list's call to __len__ swallow SystemExit?

Nick Coghlan ncoghlan at gmail.com
Wed Jan 14 12:12:05 CET 2009

Dino Viehland wrote:
> We had a bug reported that effectively boils down to we’re not
> swallowing exceptions when list calls __len__
> (http://www.codeplex.com/WorkItem/View.aspx?ProjectName=IronPython&WorkItemId=20598).
> We can obviously make the change to catch exceptions here in
> IronPython even if it seems like a bad idea to me ☺  But CPython
> seems to catch not only normal exceptions, but also SystemExit.  It
> seems like there’s been a move away from this so I thought I’d
> mention it here.  I tested it on 2.6.1 and 3.0.

I'd agree that CPython appears to be the one misbehaving here, rather
than IronPython.

Opening a new issue at bugs.python.org would be the best way forward.


Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia

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