From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Atticus Newsgroups: gmane.lisp.guile.bugs Subject: bug#21855: eq? 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X-Mailman-Approved-At: Sat, 07 Nov 2015 12:05:04 -0500 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 208.118.235.43 X-Mailman-Approved-At: Sat, 07 Nov 2015 17:17:43 -0500 X-BeenThere: bug-guile@gnu.org List-Id: "Bug reports for GUILE, GNU's Ubiquitous Extension Language" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Original-Sender: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.lisp.guile.bugs:7881 Archived-At: So I wanted to try out gnu guix and thus make myself more familiar with guile first. While running some tests I encountered a problem/bug with eq?: $ guile -v guile (GNU Guile) 2.1.1 $ guile scheme@(guile-user)> (define (multirember a lat) (cond ((null? lat) '()) ((eq? (car lat) a) (multirember a (cdr lat))) (else (cons (car lat) (multirember a (cdr lat)))))) scheme@(guile-user)> (multirember '(a b) '(x y (a b) z (a b))) $1 = (x y z) So why does guile return (x y z)? I expected (x y (a b) z (a b)). I know eq? should only be used with symbols (and thus this example is more theoretical) but nevertheless the return value is not right, since (eq? '(a b) '(a b)) returns #f (Btw same in guile 2.0.11).