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* bug#23781: 25.0.95; read-string with HIST lexically bound
@ 2016-06-17  5:19 Tino Calancha
  2016-06-17 15:25 ` Michael Heerdegen
  0 siblings, 1 reply; 18+ messages in thread
From: Tino Calancha @ 2016-06-17  5:19 UTC (permalink / raw)
  To: 23781


Hello,

recently i have noticed that arg HIST in read-from-minibuffer/read-string
needs to be dynamically bound.  If the file has the local variable
lexical-binding non-nil those functions just pick up one element of HIST.

In case this is a feature, it would be worth to mention it on the manual.


Following example reproduce the issue:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

I)

Create two files 'test-dynamic.el', 'test-lexical.el'
as follows:

*) test-dynamic.el:
(defun my-test-dynamic ()
   "Test of dynamic-binding."
   (interactive)
   (let ((values '("a" "b" "c")))
     (read-string "dynamic: " (car values) '(values . 1))))


*) test-lexical.el:
;; -*- lexical-binding: t; -*-

(defvar my-test-var nil)

(defun my-test-lexical-defvar ()
   "Test of lexical-binding with defvar."
   (interactive)
     (let ((values '("a" "b" "c")))
       (setq my-test-var values))
     (read-string "lexical-defvar: " (car my-test-var) '(my-test-var . 1)))

(defun my-test-lexical ()
   "Test of lexical-binding."
   (interactive)
   (let ((values '("a" "b" "c")))
     (read-string "lexical: " (car values) '(values . 1))))

II)
emacs -Q -l test-dynamic.el -l test-lexical.el

II.1)

M-x my-test-dynamic RET
;; minibuffer shows: dynamic: a
M-p
;; minibuffer shows: dynamic: b
M-p
;; minibuffer shows: dynamic: c

II.2) (Similar than II.1)

M-x my-test-lexical-defvar RET
;; minibuffer shows: lexical-defvar: a
M-p
;; minibuffer shows: lexical-defvar: b
M-p
;; minibuffer shows: lexical-defvar: c

II.3) (Different)
M-x my-test-lexical RET
;; minibuffer shows: lexical: a
M-p
;; user-error: Beginning of history; no preceding item


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

In GNU Emacs 25.0.95.1 (x86_64-pc-linux-gnu, GTK+ Version 3.20.6)
  of 2016-06-15 built on calancha-pc
Repository revision: d7084f2260943287cdfb5e3021ac33aab6a14c6d
Windowing system distributor 'The X.Org Foundation', version 11.0.11803000
System Description:    Debian GNU/Linux testing (stretch)

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11

Important settings:
   value of $LANG: en_US.UTF-8
   locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
   tooltip-mode: t
   global-eldoc-mode: t
   electric-indent-mode: t
   mouse-wheel-mode: t
   tool-bar-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
   line-number-mode: t
   transient-mark-mode: t

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Quit [2 times]
user-error: Beginning of history; no preceding item [2 times]
Quit

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Memory information:
((conses 16 86343 6478)
  (symbols 48 19751 0)
  (miscs 40 38 121)
  (strings 32 14375 4876)
  (string-bytes 1 409631)
  (vectors 16 11718)
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  (intervals 56 193 0)
  (buffers 976 11)
  (heap 1024 28246 991))






^ permalink raw reply	[flat|nested] 18+ messages in thread

end of thread, other threads:[~2016-07-01  4:07 UTC | newest]

Thread overview: 18+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2016-06-17  5:19 bug#23781: 25.0.95; read-string with HIST lexically bound Tino Calancha
2016-06-17 15:25 ` Michael Heerdegen
2016-06-23 23:01   ` Noam Postavsky
2016-06-23 23:18     ` Drew Adams
2016-06-25  0:26       ` Noam Postavsky
2016-06-25 10:12         ` Stephen Berman
2016-06-25 16:53           ` Noam Postavsky
2016-06-25 18:53             ` Stephen Berman
2016-06-25 19:46               ` Noam Postavsky
2016-06-25 22:07                 ` Stephen Berman
2016-06-25 23:42                   ` Michael Heerdegen
2016-06-26  3:34                     ` Noam Postavsky
2016-06-27  0:55                       ` Noam Postavsky
2016-07-01  4:07                         ` npostavs
2016-06-26  2:23                   ` Drew Adams
2016-06-25 21:00               ` Drew Adams
2016-06-25 20:42             ` Drew Adams
2016-06-24  2:24     ` Tino Calancha

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