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bug#16999: calc crashes when computation limit is increased

From: Jay Belanger
Subject: bug#16999: calc crashes when computation limit is increased
Date: Thu, 13 Mar 2014 16:15:56 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux)

>> There is, in the form of max-specpdl-size and max-lisp-eval-depth.
>> If you bump them up too high, you're asking for trouble.
> Maybe calc shouldn't bump them too high, then.

The Elisp manual has a warning about bumping them too high; perhaps the
Calc manual should have one also.  But this seems more like an Emacs
issue than specifically a Calc issue, so any other fixes should probably
take place out of Calc.

Dmitry has started a separate discussion on handling this issue; good

> Would I start calc, repetedly press "M" and then crash emacs – well,
> maybe I was asking for trouble.

The main culprit here is the infinite loop itself, which needs to be
fixed.  Without that, you wouldn't have had any problems.

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