Patch: support callback on allocation overflow instead of calling abort()

[Vincent Lefevre]

On 2020-10-06 16:59:10 +0200, Niels Möller wrote:
> There are other approaches to avoid these crashes, e.g., I think the
> recent emacs integration uses a (configurable) limit on bignum size, and
> will raise an emacs exception long before hitting GMP's limits, and the
> emacs process can go on running with no issues.

I would say that in practice, you are likely to hit dynamic memory limits
(e.g., which depend on the other processes running on the machine) before
GMP's limits. So I'm wondering whether this would be useful.

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