[issue39829] __len__ called twice in the list() constructor

[Eric Snow]

Eric Snow <ericsnowcurrently at gmail.com> added the comment:

FWIW, I encouraged Kim to file this.  Thanks Kim!

While it isn't part of any specification, it is an unexpected change in behavior that led to some test failures.  So I figured it would be worth bringing up. :)  I did find it surprising that we were not caching the result, but don't think that's necessarily a problem.

All that said, the change did not actually break anything other than some tests (not the code they were testing).  So I don't have a problem with closing this.

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resolution:  -> not a bug
stage:  -> resolved
status: open -> closed

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39829>
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