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=-0.3 required=5.0 tests=BAYES_00,
	REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4
X-Google-Thread: 103376,8332ddd3efd0a65
X-Google-Attributes: gid103376,public
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news2.google.com!news4.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!nx01.iad01.newshosting.com!newshosting.com!newsfeed.icl.net!newsfeed.fjserv.net!newsfeed.arcor.de!newsspool1.arcor-online.net!news.arcor.de.POSTED!not-for-mail
From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Enumeration type - GNAT 3.15p bug?
Newsgroups: comp.lang.ada
User-Agent: 40tude_Dialog/2.0.15.1
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Reply-To: mailbox@dmitry-kazakov.de
Organization: cbb software GmbH
References: <1155815395.237631.224930@m79g2000cwm.googlegroups.com>
Date: Thu, 17 Aug 2006 14:46:20 +0200
Message-ID: <1bvb9cpaso1n7$.5s3km0we2k6f.dlg@40tude.net>
NNTP-Posting-Date: 17 Aug 2006 14:46:20 CEST
NNTP-Posting-Host: d93e1e90.newsspool1.arcor-online.net
X-Trace: 
 DXC=:D0fg3n\>J;T2Rfi6<W9f5ic==]BZ:af>4Fo<]lROoR18kF<OcfhCO;`b2fgMK20o7[6LHn;2LCV>7enW;^6ZC`4F0oL<hNO29;Xi4bXPZDf_7
X-Complaints-To: usenet-abuse@arcor.de
Xref: g2news2.google.com comp.lang.ada:6242
Date: 2006-08-17T14:46:20+02:00
List-Id: <comp.lang.ada>

On 17 Aug 2006 04:49:55 -0700, Gerd wrote:

> I've found some misbehaviour of enumeration types and runtime checking.
> Assigning constant values is checked at compile time. For the dynamic
> assignment below (line 8) I would expect that an exception is raised,
> but nothing happens. I generated an assembly listing and looked at the
> code - the runtime check code is generated, but it seems to have a bug
> (wrong address calculation).
> 
> Does someone know more about it?
> - Is there really a bug in GNAT 3.15p?
> - Did I do some misinterpretation?
> 
> As far as I know the 3.15p was the last officially released version
> from AdaCore, wasn't it?
> 
>  1: procedure JEnumXa is
>  2:   type ex is (Rot, Gruen, Gelb);
>  3:
>  4:   x : ex;
>  5:
>  6:   procedure ABC ( i : Integer) is
>  7:   begin
>  8:     x := ex'VAL(i);
>  9:   end ABC;
> 10: begin
> 11: null;
> 12:   x := Rot;
> 13:   x := Gruen;
> 14:   x := ex'SUCC (X);
> 15:   -- x := ex'VAL (99);  -- compiletime error
> 16:   ABC (99);
> 17: end JEnumXa;

GNAT 3.15p (Windows):

   raised CONSTRAINT_ERROR : jenumxa.adb:8 overflow check failed

Is it possible that you have suppressed checks?

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de