[issue14460] In re's positive lookbehind assertion repetition works

[py.user]

py.user added the comment:

Tim Peters wrote:
> (?<=a)(?<=a)(?<=a)(?<=a)


There are four different points.
If a1 before a2 and a2 before a3 and a3 before a4 and a4 before something.

Otherwise repetition of assertion has no sense. If it has no sense, there should be an exception.

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<http://bugs.python.org/issue14460>
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