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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: bug in gnatgpl 2015?
Date: Mon, 31 Aug 2015 09:48:14 +0100
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Date: 2015-08-31T09:48:14+01:00
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Leo Brewin <leo.brewin@internode.on.net> writes:

> I've run into what I think is a bug in gnatgpl 2015.
> I wonder if others could confirm the bug?
>
> I've tried to make the code as short as possible while still
> capturing the alleged bug.
>
> Using gnatgpl 2015 from Adacore, I get
>
>    gnatmake crash.adb
>
>       gcc -c crash.adb
>
>       raised CONSTRAINT_ERROR : erroneous memory access
>       gnatmake: "crash.adb" compilation error
>
> and on occassions a detailed report (too long to include here but will
> be sent to Adacore if need be).

Yes. Also, the reported point of error in the long report seems to vary
with the optimisation level.

>       head     : myArray1dIntg renames head_ptr.all;

The problem seems to go away if you eliminate this declaration, and use
head_ptr[.all] instead.