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Newsgroups: comp.lang.ada
Date: Mon, 13 Aug 2018 19:37:35 -0700 (PDT)
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Subject: Re: GNAT bug with assertions
From: AdaMagica <christ-usch.grein@t-online.de>
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Xref: reader02.eternal-september.org comp.lang.ada:54166
Date: 2018-08-13T19:37:35-07:00
List-Id: <comp.lang.ada>

Am Montag, 13. August 2018 17:54:28 UTC+2 schrieb Simon Wright:
>    function Maybe (X : Priv) return Subt is
>    begin
>       return X;
>    end Maybe;
> 
> called as
> 
>    S : Subt := Maybe (-1);
>    
> Maybe happily returns -1 and leaves it up to the assignment to raise the
> necessary exception.
> 
> And if the assignment is
> 
>    P : Priv := Maybe (-1);
> 
> no exception is raised.

Yes, this is what currently happens. Assertion_Error should instead be raised in both cases by Maybe.