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=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,abd508cccb4803ea X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2002-06-21 19:55:18 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!logbridge.uoregon.edu!news.maxwell.syr.edu!wn1feed!worldnet.att.net!204.127.198.204!attbi_feed4!attbi.com!rwcrnsc52.ops.asp.att.net.POSTED!not-for-mail From: "SteveD" Newsgroups: comp.lang.ada References: <3D0E09BA.A492AA3D@despammed.com> <5ee5b646.0206210355.3533be8f@posting.google.com> Subject: Re: C.A.R. Hoare on liability X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Message-ID: NNTP-Posting-Host: 12.225.227.101 X-Complaints-To: abuse@attbi.com X-Trace: rwcrnsc52.ops.asp.att.net 1024714517 12.225.227.101 (Sat, 22 Jun 2002 02:55:17 GMT) NNTP-Posting-Date: Sat, 22 Jun 2002 02:55:17 GMT Organization: AT&T Broadband Date: Sat, 22 Jun 2002 02:55:17 GMT Xref: archiver1.google.com comp.lang.ada:26583 Date: 2002-06-22T02:55:17+00:00 List-Id: "Robert Dewar" wrote in message news:5ee5b646.0206210355.3533be8f@posting.google.com... [snip] > > First, runtime checks can be deadly if you have not done proper analysis > of how they can be handled, since they can turn trivial errors that would > not intefere with overall correct function into disasters (Ariane5 is > an example of this in action). > Of course the errors detected by runtime checks might not be trivial errors as well. I can recall a case where an occasional overflow in calculations in an old FORTRAN program caused some very large machinery to move to a very awkward position. As you say there is no substitute for doing a proper analysis. SteveD