Hi There,
Speaking about hash...
> - Much worst: the Python assumption that the hash value of an object
> does not change can easily be broken inadvertently, even by a total
> beginner, by using the rename feature:
>
> sage: K = QQ['x']
> sage: hash(K)
> -764788796815899192
> sage: K.rename("K")
> sage: hash(K)
> 9600028874
This one is fixed in #8119 thanks to Robert Bradshaw. I'm ok with the patch
but I added a review patch so I can't put positive review myself. Also, #9181
is a very simple patch (only doc) about hash and awaiting for review for long.
Cheers,
Florent Hivert
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