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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: GNAT bug with assertions
Date: Mon, 13 Aug 2018 10:07:27 +0100
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Xref: reader02.eternal-september.org comp.lang.ada:54159
Date: 2018-08-13T10:07:27+01:00
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AdaMagica <christ-usch.grein@t-online.de> writes:

> Am Sonntag, 12. August 2018 20:51:51 UTC+2 schrieb Simon Wright:
>> AdaMagica 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.
>
> What is it that you expect here? What type is X? I didn't try with
> GNAT, but I would expect Maybe (C) to raise Assertion_Error
> independently of X.

Oh come on! these are additions to the example that *you* posted upthread.