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=2.2 required=5.0 tests=BAYES_00,FROM_WORDY,
	REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,3cf26033e2e108c9
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 2002-07-03 07:10:01 PST
Path: 
 archiver1.google.com!news1.google.com!newsfeed.stanford.edu!canoe.uoregon.edu!logbridge.uoregon.edu!feed2.news.rcn.net!feed1.news.rcn.net!rcn!not-for-mail
From: "Frank J. Lhota" <NOSPAM.FrankLho@rcn.com>
Newsgroups: comp.lang.ada
Subject: Re: "Program received signal SIGSEGV, Segmentation fault".
Date: Wed, 3 Jul 2002 10:09:57 -0400
Message-ID: <afv0je$f44$1@bob.news.rcn.net>
References: <afupok$3k9$1@newstoo.ericsson.se>
 <mailman.1025702043.815.comp.lang.ada@ada.eu.org>
Reply-To: "Frank J. Lhota" <NOSPAM.FrankLho@rcn.com>
X-Trace: UmFuZG9tSVaenQcaW+dENIdQY5ZbMMxyj7ay6CQDN6QQFcV1UqXWdTCN+Ka4LBpm
X-Complaints-To: abuse@rcn.com
NNTP-Posting-Date: 3 Jul 2002 14:09:50 GMT
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000
X-Priority: 3
X-Newsreader: Microsoft Outlook Express 6.00.2600.0000
X-MSMail-Priority: Normal
Xref: archiver1.google.com comp.lang.ada:26842
Date: 2002-07-03T14:09:50+00:00
List-Id: <comp.lang.ada>

> In the context of an Ada program, it might well be attempting to
> use an access value which was never initialized,

Every Ada access object is initialized; in the absence of an explicit
initialization, an Ada access object is initialized as null.

> or which has
> become invalid because the memory which it accesses was freed
> by a call to an instantiation of Ada.Unchecked_Deallocation.

That is certainly possible. Access object produced by
Ada.Unchecked_Conversion can also be the cause of this problem.


> I hope this helps.
>
> ----- Original Message -----
> From: "Darren" <sebastian.madunic@avionics.saab.se>
> Newsgroups: comp.lang.ada
> To: <comp.lang.ada@ada.eu.org>
> Sent: Wednesday, July 03, 2002 7:18 AM
> Subject: "Program received signal SIGSEGV, Segmentation fault".
>
>
> > Hi,
> >
> > I got this message from the GVD debugger when I run my program,
> > "Program received signal SIGSEGV, Segmentation fault"
> >
> >  What does it mean? What is the problem?
> >
> > Kind regards,
> >
> > M
> >
> >
> > _______________________________________________
> > comp.lang.ada mailing list
> > comp.lang.ada@ada.eu.org
> > http://ada.eu.org/mailman/listinfo/comp.lang.ada
> >
>