GNU bug report logs - #28595
In mode-line-format, `:propertize' drops some existing text properties

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Message #16 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Clément Pit--Claudel <clement.pitclaudel <at> live.com>
To: Eli Zaretskii <eliz <at> gnu.org>, bug-gnu-emacs <at> gnu.org,
 28595-done <at> debbugs.gnu.org
Subject: Re: bug#28595: In mode-line-format, `:propertize' drops some existing
 text properties
Date: Tue, 26 Sep 2017 01:10:40 +0200

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

On 2017-09-25 20:52, Eli Zaretskii wrote:
> On September 24, 2017 2:03:02 PM GMT+01:00, "Clément Pit--Claudel" <clement.pitclaudel <at> live.com> wrote:
>> Hi all,
>>
>> Based on the docs, the three following forms should yield the same
>> results:
>>
>> (format-mode-line `(:propertize #("AB" 1 2 (x 0)) y 0))
>> (format-mode-line `(:propertize ("A" #("B" 0 1 (x 0))) y 0))
>> (format-mode-line '(:propertize ("A" (:propertize "B" x 0)) y 0))
>>
>> But they don't:
>>
>> (format-mode-line `(:propertize #("AB" 1 2 (x 0)) y 0))
>> => #("AB" 0 2 (y 0)) ;; x 0 is dropped
>>
>> (format-mode-line '(:propertize ("A" (:propertize "B" x 0)) y 0))
>> ⇒ #("AB" 0 1 (y 0) 1 2 (x 0)) ;; y 0 is dropped on 1..2
>>
>> (format-mode-line `(:propertize ("A" #("B" 0 1 (x 0))) y 0))
>> ⇒ #("AB" 0 1 (y 0) 1 2 (y 0 x 0)) ;; Seems right
>>
>> Am I misreading the docs?
>> Clément.
> 
> You already asked the same in bug#26291.

Ouch. Sorry.

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