From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-0.4 required=5.0 tests=AC_FROM_MANY_DOTS,BAYES_00
	autolearn=no autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,c658912279760559
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 2002-02-19 16:27:46 PST
Path: 
 archiver1.google.com!news1.google.com!newsfeed.stanford.edu!newsfeeds.belnet.be!news.belnet.be!psinet-eu-nl!psiuk-p4!uknet!psiuk-p3!uknet!psiuk-n!news.pace.co.uk!nh.pace.co.uk!not-for-mail
From: "Marin David Condic" <dont.bother.mcondic.auntie.spam@[acm.org>
Newsgroups: comp.lang.ada
Subject: Re: Unchecked_Deallocation and Constraint_Error
Date: Tue, 19 Feb 2002 09:15:44 -0500
Organization: Posted on a server owned by Pace Micro Technology plc
Message-ID: <a4tmmj$asm$1@nh.pace.co.uk>
References: <mailman.1014120903.15641.comp.lang.ada@ada.eu.org>
 <87adu57ht6.fsf@deneb.enyo.de>
NNTP-Posting-Host: dhcp-200-133.miami.pace.co.uk
X-Trace: nh.pace.co.uk 1014128147 11158 136.170.200.133 (19 Feb 2002 14:15:47
 GMT)
X-Complaints-To: newsmaster@news.cam.pace.co.uk
NNTP-Posting-Date: 19 Feb 2002 14:15:47 GMT
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200
Xref: archiver1.google.com comp.lang.ada:20150
Date: 2002-02-19T14:15:47+00:00
List-Id: <comp.lang.ada>

It is probably really important to know the platform, compiler, version and
compiler options enabled when discussing why an exception of this nature is
or is not raised. I could easily imagine a compiler optimizing away the
checks necessary for this exception in the abscence of options specifying
full Ada95 runtime checking.

I know, for example, that Gnat won't generate the checks that cause
Constraint_Error on integer range excptions unless you throw a switch to
enable it. Could this be a similar case?

MDC
--
Marin David Condic
Senior Software Engineer
Pace Micro Technology Americas    www.pacemicro.com
Enabling the digital revolution
e-Mail:    marin.condic@pacemicro.com
Web:      http://www.mcondic.com/


"Florian Weimer" <fw@deneb.enyo.de> wrote in message
news:87adu57ht6.fsf@deneb.enyo.de...
> Christoph Grein <christoph.grein@eurocopter.com> writes:
>
> > That's correct, but 13.11.2(7) specifies that the value of Cmd is
> > null after UD (I assume Free is an instantiation of UD), so a
> > dereference Cmd(1) must raise CE, except when checks are suppressed.
>
> Oops, you are correct.  Maybe the OP is operating on a copy of the
> access value, so that 13.11.2(7) does not matter.