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#37888: 27.0.50; Streams and errors in element generation Date: Thu, 24 Oct 2019 13:38:27 +0200 Message-ID: <87ftjis79o.fsf@web.de> References: <87eez3eduv.fsf@web.de> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="131978"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: Nicolas Petton To: 37888@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Oct 24 14:37:37 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 (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1iNcMy-000Y9m-73 for geb-bug-gnu-emacs@m.gmane.org; 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d=web.de; s=dbaedf251592; t=1571917099; bh=JaZgNhziRLnQ2Vg+6Xpp4qEGPfqzWcddubgXHB1+4HM=; h=X-UI-Sender-Class:From:To:Cc:Subject:References:Date:In-Reply-To; b=EgypzoDOw3vX8cd09xfm64rjzfef7o1MNnEFLRX1pXI7OTkcU3m/J8w19dcn2zDNS HkE0yNe0XnneMiPI4ZyHAmGLAVrgp0aHmNts2YbCFBzK8VvK1nfP9lAUJHEpJyFKUu DR7/v8R95JTs2Ol3k0PYAYiS4+BV7zOVktVferm8= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Original-Received: from drachen.dragon ([94.218.222.9]) by smtp.web.de (mrweb002 [213.165.67.108]) with ESMTPSA (Nemesis) id 0MDPUT-1iDSxa0D4H-00Gr3j; Thu, 24 Oct 2019 13:38:19 +0200 In-Reply-To: <87eez3eduv.fsf@web.de> (Michael Heerdegen's message of "Wed, 23 Oct 2019 16:27:36 +0200") X-Provags-ID: V03:K1:V9/dgGleg8IFTp/K+vfm3JpmV5zXpJMinGQtOvdjRB0KyttF12a wER9GF5WA5su/A9LR6FEWeniNJUZESpqSTwEABeitkwZ2dc8zIWZu9Sbvd2m9C1gqpHo9Zh +NuLy6Gq4mrLEYmoSYCZ7JUtQtuPU41pXtAHjzPgnM8U4u83yLf6TksS29BF5+uDhUX1mt4 lEkpU3O+CjtssRQwn7jjw== X-UI-Out-Filterresults: notjunk:1;V03:K0:GCmEwOM9PmU=:QTpybxKybkkJYysQJP0E9V E0NduSPdWrW43JFhwlq9xVexaZsqY8yWYbko/zewK/bbXKXgu7neG8lA3krTpN46l+vwzRVIz RS9oPbnkYtc3oBEn5IIqrsDxo8bwpRJpfg8CxnmwQ5cwaU/wVyJ2M1z641IsP+3IyLQaw0bIU A2IahQsjLD35bGL20Dg40L29HN0PC3caRA61dKdaOgFxWK49RRGBF2SiDglLvW2smb+Y0BRU1 jUBZuwjagVcgNeT3RIBNCc2ehyTqQ7uIvQKqRPejlur5X2hLNsP0KX+POC/wmS5pHqdSEzWGe D9z8IZKo9PqF1tDY23eBd/6/ZE4S5a37oYyx1kzAQXIueH+zEtSvo3+tswt2dVm2YxiIZ6Wz3 JEBEIEkxcgMi5qAFdXDx0uukdNXqyuFychBzJ6tgWI3Fd32xEWncdLBJQ8050veH4yJjOxw6v kTSsqrRmuqJWACNyJVE19xtGZwY0i9BL99imWbaPfC2awISJsnUXVAE5H4luXrFP91DKVNZh5 i5lfLaP8T5tu2QCFO6o4FXGqJ6Qq9VV5E+dal8ReXGhKgSYWDVj7riqD9e/U+qFtekKrCX4FF Lz3ZUJ91OZjbELzp7XPTtpgkY8IOPv+zgsvW0/VakA7DWre1K26oI0mevbxkN0phKc5SJON4h CpHe/lrtfazY2DTat58i7rdy+cQS+kSASy/d284LqKQ3ejKEOxtQY5PXPLMrk9Zcg+2bMPX/E MYV42Op2E9p+Ck9Hrj5EnVFydYQEz8nWP4zt4USi3PtZoH8+ZiG1jVjnHkLEObXSn0I36FZG 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:170119 Archived-At: Hello again, Btw, AFAIU this problem pertains any form of nonlocal exit, not only errors. Using nonlocal exits in stream element generation (e.g. via `while-no-input') is a common use case for me. My suggested should fix this. Regards, Michael. > consider this case (it appeared to me in real life): > > (defun test-stream (n) > (stream-cons n (if (< n 0) (error "test") (test-stream (1- n))))) > > (setq my-stream (test-stream 10)) > > (condition-case nil (seq-length my-stream) > (error (message "Hmm, didn't work so well"))) > > Now, what happened to `my-stream' after evaluating this? If you try to > use it, you get a quite confusing error: > > (seq-length my-stream) > > |-- stream--force: Wrong type argument: streamp, (((n . -1) t) nil ...)