[issue45539] Negative lookaround assertions sometimes leak capture groups

[Matthew Barnett]

Matthew Barnett <python at mrabarnett.plus.com> added the comment:

It's definitely a bug.

In order for the pattern to match, the negative lookaround must match, which means that its subexpression mustn't match, so none of the groups in that subexpression have captured.

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versions: +Python 3.10

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue45539>
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