From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Michael Heerdegen Newsgroups: gmane.emacs.bugs Subject: bug#34852: 26.1; seq-intersection ignores nil as element Date: Fri, 15 Mar 2019 00:42:39 +0100 Message-ID: <8736np58gg.fsf@web.de> References: <87zhpxabn3.fsf@tcd.ie> <87va0lmwlg.fsf@web.de> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="169349"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: "Basil L. Contovounesios" , Nicolas Petton , 34852@debbugs.gnu.org, "Miguel V. S. Frasson" To: Stefan Monnier Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Mar 15 00:51:16 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1h4a84-000hwP-Ly for geb-bug-gnu-emacs@m.gmane.org; Fri, 15 Mar 2019 00:51:16 +0100 Original-Received: from localhost ([127.0.0.1]:46715 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h4a83-0005Dg-Lv for geb-bug-gnu-emacs@m.gmane.org; Thu, 14 Mar 2019 19:51:15 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:46593) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h4a7r-0004yc-1D for bug-gnu-emacs@gnu.org; Thu, 14 Mar 2019 19:51:03 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1h4a09-0000wd-Lh for bug-gnu-emacs@gnu.org; Thu, 14 Mar 2019 19:43:07 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:58886) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1h4a06-0000uo-NV for bug-gnu-emacs@gnu.org; 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Thu, 14 Mar 2019 19:42:58 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=web.de; s=dbaedf251592; t=1552606963; bh=9CiEJGwpQp3xeCtK/4/f7j3U7EXV4pZBD9Bboeb3Li4=; h=X-UI-Sender-Class:From:To:Cc:Subject:References:Date:In-Reply-To; b=cJ0pHsYDiizkDrigsD7vFEqUVKRw8qphiUQ1xxjLHQIkRWFnvzkH+CljFOTiRTSoV +2oPd+18iH/UlKDA6wcFl+31E2StABaPp0iwhWcrRErkIbH1hVCcozrfVDCzOnDtjV KoO0oE1GY+romD/jLwC+cj+42HRPpqOqDV+n/zcE= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Original-Received: from drachen.dragon ([88.67.111.211]) by smtp.web.de (mrweb101 [213.165.67.124]) with ESMTPSA (Nemesis) id 0MRl5x-1hSxX13NTV-00SwJ0; Fri, 15 Mar 2019 00:42:42 +0100 In-Reply-To: (Stefan Monnier's message of "Thu, 14 Mar 2019 19:14:23 -0400") X-Provags-ID: V03:K1:z3AgDuYN98e44b8rCAsMTdA5X6tomMq7BOdzMBrbaa+6FeTNmC4 jRT/NsOmX6GY9/l/VNb+ZmRqbtI+m8ItRA8+TvWD9AmUxhyO3WNjJMqy9xWgQi/u3E2ZpFk 7eA+9/8TQkv8W6Vvs+qPowg9AmgmIY6cCs0hsPiPzlUeQj2ml72BsXcT1RUhdj69DHtrU0J CEaKaVLKSs+8eWgGU3r6A== X-UI-Out-Filterresults: notjunk:1;V03:K0:6sAz0U2XNm0=:tqj2Se8E1i1WTXLJgYfdy3 imo+AWzokMHQMGVLM8GTUqS/Bd2hOgKxMSAyAWjQhDs+hLVOJta3jDDaWSqX8CMfOVzDHYhmR TS6IscumvgFkw4kTutOdRlPHWq5z+bV0YMFxbHkRX3mmyVTDoAjUzZwK8iD+RqxgT74Ysi+Gh rnKdPL1zUrW0xpTWFCr09qlEqMiHIzhkwte/9uXQtLEZ9ESaVWYOzKVzBQWhOYkpxfQNI+6ws tWzNxz0Iuhlqu950jY720UrM/5Fvxkj3QymFenEW5mPJq1UDvW0qjIowOdzWvWkaiiobGcgqw PK0p/1KY3UtaBVTSTcXEdaZXqo+XjEMrCVQ47SrfDMjX+MO4qGCmtTQjWK1iTtJjtJpwrSNKe AIPGNPqG1NLgxxzuKyylWKxkPqXK4izQgE39SbWiecvO1WpjaKWJD3nL0s+MnpTi3LuVQNWYt cNhEz85r0XWX2fZj7bjxeMATrpsMIsdRWwGSzrGu/eAw0PthgNhxTpxflAQt7mcbp+1K5hTct wMyj/o0enhYr1T0Ixns71Rk0ICAWCLw1DU/1G/JseX2m8AQ8bJU8XuETUJEzoF7Fb31CrHhfv S8zlz0syuHQJJtNlUGN3kxQ+tnimxL3oQghPloUW3+binPd+KJ/YsFPgPFgwC0y50eMbYwWWD wtZa18qT1ZVN8fhYxgfw8/xdJWHCRFh/5GmCNa541zRbxREJA3ITHae2+8WfC0W2curkWo9X5 Q+AmwD1gjGLq02Ays9kl4hR5D6TqxYI9atASbq/c4FUmhSZdqGjWe8te54ku65aypyVIl4BX X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:156366 Archived-At: Stefan Monnier writes: > > (seq-contains nil '(nil t foo) (lambda (x) t)) -> nil > > It returns *nil* if testfn fails, or *nil* (ELT) if it succeds. > > Just because it sometimes does doesn't mean it always does: > > (seq-contains '(0 3 4) 1 #'<) > > returns 3 Maybe it's too late here, but why is that a counterexample for > If ELT=3Dnil, seq-contains currently returns nil anyway;" The first element is returned for that the test succeeds, what's special about it? < is not symmetrical, though, so it's a weird kind of equality test. Michael.