bug#21959: [25.1.50.1] No way to save customization from emacs -Q

["Andreas Röhler" <andreas.roehler@easy-emacs.de>]

  On 20.11.2015 10:05, Andreas Röhler wrote:
>  On 20.11.2015 09:24, Eli Zaretskii wrote:
>>> Date: Fri, 20 Nov 2015 08:24:23 +0100
>>> From: Andreas Röhler<andreas.roehler@easy-emacs.de>
>>> CC: 21959@debbugs.gnu.org
>>>
>>>>        If Emacs was invoked with the `-q' or `--no-init-file' options
>>>>     (*note Initial Options::), it will not let you save your 
>>>> customizations
>>>>     in your initialization file.  This is because saving 
>>>> customizations
>>>>     from such a session would wipe out all the other customizations 
>>>> you
>>>>     might have on your initialization file.
>>>>
>>> Hmm, maybe not link saving and wiping out?
>>> What is the rational for theses connection?
>> AFAIU, Customize cannot _update_ your settings (which might include
>> customizations of more than one feature) without _loading_ them from
>> your ~/.emacs first.  All it can do is to write out the few (usually,
>> just one) customizations you did in the "emacs -Q" session, replacing
>> whatever was there before.  This effectively "wipes out" what you had
>> there.
>

Emacs was started -Q, but init-file and custom-file loaded manually 
afterwards.