GNU bug report logs - #16201
24.3.50; error expanding pcase with a pred clause

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Michael Heerdegen <michael_heerdegen <at> web.de>
Subject: bug#16201: closed (Re: bug#16201: 24.3.50; error expanding pcase
 with a pred clause)
Date: Fri, 03 Jan 2014 04:42:02 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#16201: 24.3.50; error expanding pcase with a pred clause

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 16201 <at> debbugs.gnu.org.

-- 
16201: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=16201
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Michael Heerdegen <michael_heerdegen <at> web.de>
Cc: 16201-done <at> debbugs.gnu.org
Subject: Re: bug#16201: 24.3.50; error expanding pcase with a pred clause
Date: Thu, 02 Jan 2014 23:41:03 -0500

> sorry if this is a known issue.

It wasn't, thank you.

>   pcase-bug.el:3:1:Error: Wrong type argument: stringp, nil

Should be fixed now, thank you,


        Stefan

[Message part 3 (message/rfc822, inline)]

From: Michael Heerdegen <michael_heerdegen <at> web.de>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3.50; error expanding pcase with a pred clause
Date: Fri, 20 Dec 2013 15:45:10 +0100

Hi,

sorry if this is a known issue.

In emacs -Q (current trunk), save the following snipped

--8<---------------cut here---------------start------------->8---
(require 'pcase)

(defun test-buffer-file-name ()
  (pcase buffer-file-name
    (`nil                   'not-a-file)
    ((pred file-writable-p) 'writable)
    (_                      'not-writable)))
--8<---------------cut here---------------end--------------->8---

into a file.  Then, M-: (byte-compile-file buffer-file-name).  You get
an error:

  pcase-bug.el:3:1:Error: Wrong type argument: stringp, nil

Same with C-x C-e with point after the defun.

BTW, (require 'pcase) is necessary in the recipe.  If pcase has not yet
been loaded, the error doesn't happen.  Instead you can compile or eval
the defun (once), and it works as expected!


Thanks,

Michael.




In GNU Emacs 24.3.50.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.8.4)
 of 2013-12-20 on drachen
Windowing system distributor `The X.Org Foundation', version 11.0.11403000
System Description:	Debian GNU/Linux testing (jessie)

Configured using:
 `configure --prefix=/usr/local/built/'

Important settings:
  value of $LC_ALL: de_DE.utf8
  value of $LC_COLLATE: C
  value of $LC_TIME: C
  value of $LANG: de_DE.utf8
  locale-coding-system: utf-8-unix

Major mode: Emacs-Lisp

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