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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: GNAT bug with assertions
Date: Sun, 12 Aug 2018 19:51:50 +0100
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Date: 2018-08-12T19:51:50+01:00
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AdaMagica <christ-usch.grein@t-online.de> writes:

> Thank you all for your time to think about this.
>
> I'll send it in to AdaCore. Hopefully it will be correted next year in
> the public version.

This is a somewhat artificial error, isn't it?

   function Maybe (X : Priv) return Subt;
   ...
   function Maybe (X : Priv) return Subt is (X);
   ...
   X := Maybe (C);   -- C is -1

works as we would have expected.