[Bug python/16286] value.string(length = x) broken for common variable length arrays idiom

["dje at google dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16286

--- Comment #10 from dje at google dot com ---
(In reply to brobecker from comment #9)
> It's something we already do for Ada. We call it varsize limit,
> and I just realized that we forgot to contribute the "set/show"
> commands! In my 13 years at AdaCore, and the few years before that
> as a lambda user, we never had a case where the error triggered
> by this limit was not symptomatic of a real problem - usually
> undefined data.
> 
> I think it would be fine to generalize varsize limit core GDB,
> instead of keeping it within ada-lang. I agree it's not perfect,
> like all heuristics, but it's been working really well for us.

I would want an option to any API routine that uses it to turn it off.
If I'm a module writer, I would not want a user-settable option affecting and
possibly breaking my module.  The alternative of setting/resetting the option
around API calls would turn off any module writer (I hope :-)).

Otherwise, "works for me".

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