[issue1242657] list(obj) can swallow KeyboardInterrupt

[Georg Brandl]

Georg Brandl <georg at python.org> added the comment:

The problem is in _PyObject_LengthHint which calls len(o) and masks all
exceptions from it. Its comments says "This function never fails.
Accordingly, it will mask exceptions raised in either method."

Would it be better to at least not mask BaseExceptions?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue1242657>
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