GNU bug report logs - #55870
GNU Emacs 26.3, Select All(C-x h) does not work

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From: Bruce <brucelam1982pi <at> anche.no>
To: Eli Zaretskii <eliz <at> gnu.org>, Po Lu <luangruo <at> yahoo.com>
Cc: 55870 <at> debbugs.gnu.org, larsi <at> gnus.org
Subject: bug#55870: GNU Emacs 26.3, Select All(C-x h) does not work
Date: Mon, 18 Jul 2022 08:24:49 +0800

>Bruce, can you build Emacs with that option enabled and provide us
>with the traces?
Enable that option in configure before "make" and "make install"?

Steps to trace it after new build?

>Also, do you have some software installed on your system that could
>automatically request the clipboard contents when Emacs puts text
>there?
I will check.

Thanks, :-)

On 2022/7/17 下午8:49, Eli Zaretskii wrote:
>> From: Po Lu <luangruo <at> yahoo.com>
>> Cc: brucelam1982pi <at> anche.no,  larsi <at> gnus.org,  55870 <at> debbugs.gnu.org
>> Date: Sun, 17 Jul 2022 19:57:20 +0800
>>
>> Eli Zaretskii <eliz <at> gnu.org> writes:
>>
>>> So the growing memory can only be explained by the consing of
>>> selection_value onto terminal->Vselection_alist, where selection_value
>>> is the text being copied by M-w?
>> The previous value of the selection will also be removed from
>> terminal->Vselection_alist, so it shouldn't cause memory usage to
>> constantly increase.
>>
>>> Can any of the potential requests in this situation allocate lots of
>>> memory?
>> Yes.  The string is copied each time another program requests the
>> selection, and we have to allocate a buffer the size of the encoded X
>> property data each time we want to send it to another client.
>>
>> But unfortunately I can't see any obvious memory leak here.  The
>> reporter should build with TRACE_SELECTION and send some of the output,
>> which could reveal, for example, bugs in the other program (possibly a
>> clipboard manager, since clipboard managers are a known problematic area
>> in the X world) that the code in xselect.c doesn't already take into
>> account.
> Bruce, can you build Emacs with that option enabled and provide us
> with the traces?
>
> Also, do you have some software installed on your system that could
> automatically request the clipboard contents when Emacs puts text
> there?  If so, perhaps disabling that software will resolve the
> problem.
>
> Thanks.

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