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.