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Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Thomas Koenig <tkoenig@netcologne.de> Newsgroups: comp.arch Subject: Re: Computer architects leaving Intel... Date: Mon, 2 Sep 2024 17:59:16 -0000 (UTC) Organization: A noiseless patient Spider Lines: 21 Message-ID: <vb4udk$2ugqg$1@dont-email.me> References: <2024Aug30.161204@mips.complang.tuwien.ac.at> <memo.20240830164247.19028y@jgd.cix.co.uk> <vasruo$id3b$1@dont-email.me> <2024Aug30.195831@mips.complang.tuwien.ac.at> <vat5ap$jthk$2@dont-email.me> <vaunhb$vckc$1@dont-email.me> <vautmu$vr5r$1@dont-email.me> <2024Aug31.170347@mips.complang.tuwien.ac.at> <vavpnh$13tj0$2@dont-email.me> <vb2hir$1ju7q$1@dont-email.me> <8lcadjhnlcj5se1hrmo232viiccjk5alu4@4ax.com> <vb3k0m$1rth7$1@dont-email.me> <17d615c6a9e70e9fabe1721c55cfa176@www.novabbs.org> Injection-Date: Mon, 02 Sep 2024 19:59:17 +0200 (CEST) Injection-Info: dont-email.me; posting-host="0345d965feb7de85f7a1793c751a4a5d"; logging-data="3097424"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19VEANe1kjOlui0r8ifaoMPcPBMTB2ImiA=" User-Agent: slrn/1.0.3 (Linux) Cancel-Lock: sha1:P/skGnSWOh150ziln9GK4d4XmH4= Bytes: 2035 MitchAlsup1 <mitchalsup@aol.com> schrieb: > On Mon, 2 Sep 2024 5:55:34 +0000, Thomas Koenig wrote: > >> George Neuner <gneuner2@comcast.net> schrieb: >> >>> I'm not going to argue about whether UB in code is wrong. The >>> question I have concerns what to do with something that explicitly is >>> mentioned as UB in some standard N, but was not addressed in previous >>> standards. >>> >>> Was it always UB? Or should it be considered ID until it became UB? >> >> Can you give an exapmple? > > Memcopy() with overlapping pointers. Does anybody have the first edition of K&R around to check what is explicity stated there? If both were intended to have the same functionality, it would have been strange to define both.