[issue1920] while else loop seems to behave incorrectly

[Mark Dickinson]

Mark Dickinson added the comment:

This bug is also present in the trunk, with while 0 instead of while 
False.

This appears closely related to issue #1875.

In my opinion this is a serious bug in the core language.  I'm not sure 
whether it's serious enough to be considered a showstopper for 2.5.2.  
In any case, I'm raising the priority to get more eyes on this before 
2.5.2.

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nosy: +marketdickinson
priority:  -> urgent
versions: +Python 2.5, Python 2.6

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