From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM
	autolearn=unavailable autolearn_force=no version=3.4.4
X-Received: by 2002:a24:45db:: with SMTP id
 c88-v6mr5643575itd.41.1534128844546;
        Sun, 12 Aug 2018 19:54:04 -0700 (PDT)
X-Received: by 2002:aca:de07:: with SMTP id v7-v6mr401140oig.5.1534128844409;
 Sun, 12 Aug 2018 19:54:04 -0700 (PDT)
Path: 
 eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!feeder.eternal-september.org!news.uzoreto.com!weretis.net!feeder6.news.weretis.net!feeder.usenetexpress.com!feeder-in1.iad1.usenetexpress.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!g24-v6no2823785iti.0!news-out.google.com!g5-v6ni3175iti.0!nntp.google.com!g24-v6no2823781iti.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
Newsgroups: comp.lang.ada
Date: Sun, 12 Aug 2018 19:54:04 -0700 (PDT)
In-Reply-To: <lywosvy200.fsf@pushface.org>
Complaints-To: groups-abuse@google.com
Injection-Info: glegroupsg2000goo.googlegroups.com;
 posting-host=121.45.203.80;
 posting-account=d51RWwoAAADvR-x0zYAtT9z3CRxT1eXo
NNTP-Posting-Host: 121.45.203.80
References: <9ebc1079-fcb0-4f63-a56a-9da37c593886@googlegroups.com>
 <pkm7hh$k8d$1@dont-email.me>
 <a08839ba-7b39-47cb-ae73-4658351b4500@googlegroups.com>
 <ly7ekwzup2.fsf@pushface.org>
 <2ed1d5bb-9fb0-4e97-b7c4-454b8692fbd7@googlegroups.com>
 <ly1sb4yr77.fsf@pushface.org>
 <438cca28-9ef5-4ea4-a45c-e7c28d6bf069@googlegroups.com>
 <lywosvy200.fsf@pushface.org>
User-Agent: G2/1.0
MIME-Version: 1.0
Message-ID: <cf43ba84-62f8-44fa-9ba6-5fbeabe19034@googlegroups.com>
Subject: Re: AdaCore Community 2018 Bugs
From: Roger <rogermcm2@gmail.com>
Injection-Date: Mon, 13 Aug 2018 02:54:04 +0000
Content-Type: text/plain; charset="UTF-8"
Xref: reader02.eternal-september.org comp.lang.ada:54156
Date: 2018-08-12T19:54:04-07:00
List-Id: <comp.lang.ada>

On Monday, August 13, 2018 at 2:37:52 AM UTC+10, Simon Wright wrote:
> Roger <rogermcm2@gmail.com> writes:
> 
> > On Sunday, August 12, 2018 at 5:33:35 PM UTC+10, Simon Wright wrote:
> >> Roger <rogermcm2@gmail.com> writes:
> >> 
> >> > As it now occurs even with GCC 6.1.0 I'm thinking it most likely has
> >> > to do with recent OSX changes.
> >> 
> >> Since it occurs on Debian Stretch, GCC 6.3.0, it can't be just macOS.
> >> 
> >> The actual error reported can change with successive compilations
> >> (sometimes it says something like 'undeclared variable ""', seems to
> >> settle on the CE), a surefire symptom of bad memory handling.
> >> 
> >> > This problem doesn't occur for compile only.
> >> > It occurs when I Build All from GPS
> >> 
> >> The error is a crash in the compiler, doesn't matter how you get there.
> >
> > I Have cut most of the code out of the test program but the crash
> > still occurs.  However, I am making progress on tracking back to the
> > minimal code where the crash first occurs.
> 
> The problem is in the packages Morph.Mesh_Morph_Value_Pointers,
> Mesh_Morph_Weight_Pointers.
> 
> You say
> 
>    package Mesh_Morph_Value_Pointers is new Interfaces.C.Pointers
>      (Interfaces.C.unsigned, API_Morph_Value, API_Morph_Values_Array,
>       API_Morph_Value'(others => <>));
> 
> but
> 
>    type API_Morph_Value is new Interfaces.C.unsigned;
> 
> so others => <> isn't a legal expression for an API_Morph_Value; you
> should say
> 
>       API_Morph_Value'(0));
> 
> 
> There is still a bug, which ought to be fixed, but it's that GNAT has
> failed to recognise the actual problem and has got fatally confused.

Thanks, very much appreciated. 
I now have my main program building without crashing GNAT.
I'll also update my bug report with this information.