From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Vivien Kraus via "Bug reports for GUILE, GNU's Ubiquitous Extension Language" Newsgroups: gmane.lisp.guile.bugs Subject: bug#50719: Cannot add a no-applicable-method implementation for a generic with no method Date: Tue, 21 Sep 2021 11:42:51 +0200 Message-ID: Reply-To: Vivien Kraus Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="=-t4obxiZUOFzRhSIF1JLF" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="14560"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Evolution 3.34.2 To: 50719@debbugs.gnu.org Original-X-From: bug-guile-bounces+guile-bugs=m.gmane-mx.org@gnu.org Tue Sep 21 11:44:21 2021 Return-path: Envelope-to: guile-bugs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mScK4-0003ZX-TI for guile-bugs@m.gmane-mx.org; 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charset="UTF-8" Content-Transfer-Encoding: 8bit Dear guile, The following program should just return 'foo, but it enters an infinite loop: (use-modules (oop goops)) (define-class ()) (define-method (no-method (generic ) args) 'foo) (define-method (no-applicable-method (generic ) args) 'foo) (define hello (make #:name 'hello)) (hello) I don’t know GOOPS enough to understand what happens, but when I slightly change the last line: (use-modules (oop goops)) (define-class ()) (define-method (no-method (generic ) args) 'foo) (define-method (no-applicable-method (generic ) args) 'foo) (define hello (make #:name 'hello)) (apply-generic hello '()) Now it returns 'foo, as expected. So my guess is that the infinite loops happens during the memoization phase. More specifically, the no- applicable-method is called over and over again. Please find a failing test case attached. Best regards, Vivien --=-t4obxiZUOFzRhSIF1JLF Content-Disposition: attachment; filename*0=0001-goops-cannot-override-no-applicable-method-for-a-gen.pat; filename*1=ch Content-Type: text/x-patch; name="0001-goops-cannot-override-no-applicable-method-for-a-gen.patch"; charset="UTF-8" Content-Transfer-Encoding: base64 RnJvbSA0MzVkNGQ3NTY5YTI1ZGRhMDU0ODljM2VkYTMwODZlMGRiZjUzMWFmIE1vbiBTZXAgMTcg MDA6MDA6MDAgMjAwMQpGcm9tOiBWaXZpZW4gS3JhdXMgPHZpdmllbkBwbGFuZXRlLWtyYXVzLmV1 PgpEYXRlOiBUdWUsIDIxIFNlcCAyMDIxIDExOjQwOjQzICswMjAwClN1YmplY3Q6IFtQQVRDSF0g Z29vcHM6IGNhbm5vdCBvdmVycmlkZSBuby1hcHBsaWNhYmxlLW1ldGhvZCBmb3IgYSBnZW5lcmlj CiB0aGF0IGhhcyBubyBtZXRob2RzCgotLS0KIHRlc3Qtc3VpdGUvdGVzdHMvZ29vcHMudGVzdCB8 IDE5ICsrKysrKysrKysrKysrKysrKysKIDEgZmlsZSBjaGFuZ2VkLCAxOSBpbnNlcnRpb25zKCsp CgpkaWZmIC0tZ2l0IGEvdGVzdC1zdWl0ZS90ZXN0cy9nb29wcy50ZXN0IGIvdGVzdC1zdWl0ZS90 ZXN0cy9nb29wcy50ZXN0CmluZGV4IGIwNmJhOThiMi4uNjI2ZWVhYWNkIDEwMDY0NAotLS0gYS90 ZXN0LXN1aXRlL3Rlc3RzL2dvb3BzLnRlc3QKKysrIGIvdGVzdC1zdWl0ZS90ZXN0cy9nb29wcy50 ZXN0CkBAIC03NjEsMyArNzYxLDIyIEBACiAgICAgICAgICAgICAgICM6bWV0YWNsYXNzIDxyZWRl ZmluYWJsZS1tZXRhPikpKQogICAgICAgKHBhc3MtaWYtZXF1YWwgMTIzIChnZXQtdGhlLWJhciAo bWFrZSA8Zm9vPikpKQogICAgICAgKHBhc3MtaWYtZXF1YWwgMTIzIChnZXQtdGhlLWJhciAobWFr ZSA8cmVkZWZpbmFibGUtZm9vPikpKSkpKQorCisod2l0aC10ZXN0LXByZWZpeCAiQ2FuIG92ZXJy aWRlIG5vLWFwcGxpY2FibGUtbWV0aG9kIGluIGEgZ2VuZXJpYyB3aXRob3V0IG1ldGhvZHMiCisg IChsZXQgKChwYXRpZW5jZS1uby1tZXRob2QgMTApCisgICAgICAgIChwYXRpZW5jZS1uby1hcHBs aWNhYmxlLW1ldGhvZCAxMCkpCisgICAgKGRlZmluZS1jbGFzcyA8bXktZ2VuZXJpYz4gKDxnZW5l cmljPikpCisgICAgKGRlZmluZS1tZXRob2QgKG5vLW1ldGhvZCAoZ2VuZXJpYyA8bXktZ2VuZXJp Yz4pIGFyZ3MpCisgICAgICAod2hlbiAoPSBwYXRpZW5jZS1uby1tZXRob2QgMCkKKyAgICAgICAg KGVycm9yICJJbmZpbml0ZSBsb29wIGRldGVjdGVkIGluIG5vLW1ldGhvZCIpKQorICAgICAgKHNl dCEgcGF0aWVuY2Utbm8tbWV0aG9kICgtIHBhdGllbmNlLW5vLW1ldGhvZCAxKSkKKyAgICAgICdm b28pCisgICAgKGRlZmluZS1tZXRob2QgKG5vLWFwcGxpY2FibGUtbWV0aG9kIChnZW5lcmljIDxt eS1nZW5lcmljPikgYXJncykKKyAgICAgICh3aGVuICg9IHBhdGllbmNlLW5vLWFwcGxpY2FibGUt bWV0aG9kIDApCisgICAgICAgIChlcnJvciAiSW5maW5pdGUgbG9vcCBkZXRlY3RlZCBpbiBuby1h cHBsaWNhYmxlLW1ldGhvZCIpKQorICAgICAgKHNldCEgcGF0aWVuY2Utbm8tYXBwbGljYWJsZS1t ZXRob2QgKC0gcGF0aWVuY2Utbm8tYXBwbGljYWJsZS1tZXRob2QgMSkpCisgICAgICAnZm9vKQor ICAgIChkZWZpbmUgaGVsbG8KKyAgICAgIChtYWtlIDxteS1nZW5lcmljPgorICAgICAgICAjOm5h bWUgJ2hlbGxvKSkKKyAgICAocGFzcy1pZi1lcXVhbCAoaGVsbG8pICdmb28pKSkKLS0gCjIuMzMu MAoK --=-t4obxiZUOFzRhSIF1JLF--