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[debbugs-tracker] bug#20307: closed (25.0.50; (regexp-opt nil ...) retur

From: GNU bug Tracking System
Subject: [debbugs-tracker] bug#20307: closed (25.0.50; (regexp-opt nil ...) returns "")
Date: Sat, 02 Mar 2019 15:25:02 +0000

Your message dated Sat, 2 Mar 2019 16:24:09 +0100
with message-id <address@hidden>
and subject line Re: bug#20307: [PATCH] make regexp-opt return a no-match 
return value with empty input
has caused the debbugs.gnu.org bug report #20307,
regarding 25.0.50; (regexp-opt nil ...) returns ""
to be marked as done.

(If you believe you have received this mail in error, please contact

20307: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=20307
GNU Bug Tracking System
Contact address@hidden with problems
--- Begin Message --- Subject: 25.0.50; (regexp-opt nil ...) returns "" Date: Sun, 12 Apr 2015 11:50:09 +0200 User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux)

M-: (regexp-opt nil) RET


M-: (regexp-opt nil t) RET

return "".  However, they should return a regexp matching _nothing_
rather than everything, and the second invocation should also count as
one \(\) pairing.

So something like "[b-a]" and "\([b-a]\)" or
"[^[:unibyte:][:multibyte:]]" or something similarly contorted.

In GNU Emacs (i686-pc-linux-gnu, GTK+ Version 3.12.2)
 of 2015-03-04 on lola
Repository revision: ca2b0e220ee6b2cab538e84703559696ce477e71
Windowing system distributor `The X.Org Foundation', version 11.0.11600000
System Description:     Ubuntu 14.10

Configured using:
 `configure --without-toolkit-scroll-bars'

Configured features:

Important settings:
  value of $LC_MONETARY: en_US.UTF-8
  value of $LC_NUMERIC: en_US.UTF-8
  value of $LC_TIME: en_US.UTF-8
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Group

Minor modes in effect:
  gnus-undo-mode: t
  diff-auto-refine-mode: t
  TeX-PDF-mode: t
  desktop-save-mode: t
  minibuffer-electric-default-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  line-number-mode: t

Recent messages:
nnml: Reading incoming mail (no new mail)...done
Reading active file from private via nnml...done
Reading active file from archive via nnfolder...done
Reading active file via nndraft...done
Reading active file from /home/dak3/Mail/family via nndir...done
Checking new news...done
Opening nnml server on private...done
Expiring articles...done
"" [2 times]

Load-path shadows:
None found.

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Memory information:
((conses 8 624077 47421)
 (symbols 24 53351 145)
 (miscs 20 1251 1014)
 (strings 16 106692 17355)
 (string-bytes 1 3514198)
 (vectors 8 38616)
 (vector-slots 4 967485 13436)
 (floats 8 355 575)
 (intervals 28 23406 1055)
 (buffers 520 305)
 (heap 1024 69082 6867))

David Kastrup

--- End Message ---
--- Begin Message --- Subject: Re: bug#20307: [PATCH] make regexp-opt return a no-match return value with empty input Date: Sat, 2 Mar 2019 16:24:09 +0100
2 mars 2019 kl. 15.57 skrev Eli Zaretskii <address@hidden>:
>> New patch attached.
> Fine with me, thanks.

Thank you, pushed.

--- End Message ---

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