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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: GNAT bug - still in 2010?
Date: Wed, 27 Oct 2010 22:56:14 +0100
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Date: 2010-10-27T22:56:14+01:00
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Maciej Sobczak <see.my.homepage@gmail.com> writes:

> On 27 Paź, 23:09, Georg Bauhaus <rm-host.bauh...@maps.futureapps.de>
> wrote:
>
>> $ gnatmake -gnatf -gnatwa -gnat05 -gnatv test.adb
>> gcc -c -gnatwa -gnat05 -gnatv test.adb
>>
>> GNAT GPL 2009 (20090519)
>> etc., same  messages
>
> $ gnatmake -gnatf -gnatwa -gnat05 -gnatv test.adb
> gcc -c -gnatf -gnatwa -gnat05 -gnatv test.adb
>
> GNAT GPL 2009 (20090519)
> Copyright 1992-2009, Free Software Foundation, Inc.
> +===========================GNAT BUG
> DETECTED==============================+
> | GPL 2009 (20090519) (x86_64-apple-darwin9.6.0) Constraint_Error
> erroneous memory access|
>
>
> I also work on Mac and I have the same compiler version.
> Looks like there are different "same" compiler versions...

This is a bit worrying. I suspect you may be using one of the compilers
that I built for Snow Leopard? 

Here, the AdaCore 2009 & 2010 compilers (which were built with
--enable-checking=release) behave as Georg reports, whereas my builds,
including GCC 4.5.0 (without --enable-checking=release) behave as you
report.

I don't think

    32.    Free (Ptr);
           1     2
        >>> "" is undefined
        >>> expected private type "System.Tasking.Protected_Objects.Protection"
        >>> found type "System.Tasking.Protected_Objects.Entries.Protection_Entries"
        >>>   ==> in call to "Finalize_Protection" at s-taprob.ads:244

is a sensible set of error messages; the compiler is clearly confused
and the bug box is arguably a better outcome!