GNU bug report logs - #31869
27.0.50; Character widget unable to read newline character

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Package: emacs; Reported by: Michael Heerdegen <michael_heerdegen@HIDDEN>; merged with #15925, #21771, #28183; dated Sun, 17 Jun 2018 06:40:01 UTC; Maintainer for emacs is bug-gnu-emacs@HIDDEN.

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To: Michael Heerdegen <michael_heerdegen@HIDDEN>
Subject: Re: bug#31869: 27.0.50;
 Character widget unable to read newline character
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Bug#15925, 21771, 28183.




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#31869; Package emacs. Full text available.
Merged 15925 21771 28183 31869. Request was from Glenn Morris <rgm@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

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From: Michael Heerdegen <michael_heerdegen@HIDDEN>
To: bug-gnu-emacs@HIDDEN
Subject: 27.0.50; Character widget unable to read newline character
Date: Sun, 17 Jun 2018 08:39:15 +0200
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Hello,

a recipe for emacs -Q:

(require 'whitespace)
(customize-option 'whitespace-display-mappings)

Make a change and undo it immediately so that the contents are unchanged
but customize lets you "Set for current session".  Do that and you get
the

"error custom-variable-set: This field should contain a single
character"

If I remove the entry for the newline character, it succeeds.

For debugging purposes I changed the :valid-regexp of the character
widget definition in wid-edit.el to ".*" and it seems that the newline
character is read in as empty string.

TIA,

Michael.



In GNU Emacs 27.0.50 (build 14, x86_64-pc-linux-gnu, GTK+ Version 3.22.29)
 of 2018-06-17 built on drachen
Repository revision: adb53168e7567462a9db9ae3c9b53f588f2fe580
Windowing system distributor 'The X.Org Foundation', version 11.0.11906000
System Description: Debian GNU/Linux buster/sid





Acknowledgement sent to Michael Heerdegen <michael_heerdegen@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs@HIDDEN. Full text available.
Report forwarded to bug-gnu-emacs@HIDDEN:
bug#31869; Package emacs. Full text available.
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Last modified: Sun, 17 Jun 2018 16:30:02 UTC

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