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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: AdaCore Community 2018 Bugs
Date: Sat, 11 Aug 2018 18:20:25 +0100
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Date: 2018-08-11T18:20:25+01:00
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Roger <rogermcm2@gmail.com> writes:

> On Saturday, August 11, 2018 at 6:42:27 PM UTC+10, Jeffrey R. Carter wrote:
>> On 08/11/2018 03:06 AM, Roger wrote:
>> > Perhaps use a different Ada compiler?
>> 
>> Have you tried the FSF GNAT 8.1.0 compiler?
>> 
>> https://sourceforge.net/projects/gnuada/files/GNAT_GCC%20Mac%20OS%20X/8.1.0/native-2017/
>> 
>
> I am also getting this problem with gcc 6.1.0
> +===========================GNAT BUG DETECTED==============================+
> | 6.1.0 (x86_64-apple-darwin15) GCC error:                                 |
> | in gnat_to_gnu_entity, at ada/gcc-interface/decl.c:3011                  |
> | Error detected at assimp_texture.ads:65:34   
>
> As I have used gcc 6.1.0 without getting this error in the past I'm
> wondering if it has something to do with OSX.
> Mac mini (Mid 2011)
> OSX 10.13.6
> Xcode 9.4.1

I see your first error in this case.

Similar error on Debian stretch (GCC 6.3.0, GNAT GPL 2017).

Since the error seems to be related to AI_Mesh_Morph_Anim, I tried
various changes such as replacing your

   type Thing_List is new Thing_Package.List with null record;

by

   subtype Thing_List is Thing_Package.List;

but no joy.