Path: csiph.com!goblin2!goblin1!goblin.stu.neva.ru!usenet.stanford.edu!individual.net!not-for-mail From: Allodoxaphobia Newsgroups: gnu.bash.bug Subject: Re: Regular Expression matching operation =~ Date: 23 Sep 2019 17:14:50 GMT Lines: 22 Approved: bug-bash@gnu.org Message-ID: References: <932d9cd1-fcfc-c085-a909-291c4013a9ed@case.edu> Reply-To: If_you_must-Reply_to@my.sig.adr NNTP-Posting-Host: lists.gnu.org X-Trace: usenet.stanford.edu 1569258899 1269 209.51.188.17 (23 Sep 2019 17:14:59 GMT) X-Complaints-To: action@cs.stanford.edu To: gnu-bash-bug@moderators.individual.net Envelope-to: bug-bash@gnu.org X-Orig-X-Trace: individual.net dhJAk0RXrS2v9u9w4znzigVweA6NfFVoHJ7vkVEe+kMw6/dxRV Cancel-Lock: sha1:+ZVM/cAmFP5FzyaPzA9GA4wg6dE= User-Agent: slrn/1.0.3 (FreeBSD) X-Originating-IP: 130.133.4.5 X-ZEDAT-Hint: R X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 130.133.4.7 X-BeenThere: bug-bash@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Bug reports for the GNU Bourne Again SHell List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Mailman-Original-Message-ID: X-Mailman-Original-References: <932d9cd1-fcfc-c085-a909-291c4013a9ed@case.edu> Xref: csiph.com gnu.bash.bug:15416 On Mon, 23 Sep 2019 09:21:44 -0400, Chet Ramey wrote: > On 9/22/19 5:44 PM, Allodoxaphobia wrote: > >> In moving a bash ver. 4.3.48 (Ubuntu) program to a bash ver. 5.0.11 >> (FreeBSD) environment I encountered either a bug, a quirk, or >> an undocumented feature. > > It's not exactly undocumented, more undefined. You can't count on > the NUL character or the empty string doing anything in particular. Thanks. The "undocumented" action made it so much easier for some coding logic in my linux/Ubuntu environement. :-) Thanks, also, to Grisha Levit for more details about the "why". Regards, Jonesy -- Marvin L Jones | Marvin | W3DHJ.net | linux 38.238N 104.547W | @ jonz.net | Jonesy | FreeBSD * Killfiling google & XXXXbanter.com: jonz.net/ng.htm