emacs: Warning (bytecomp): 'loop' is an obsolete alias (as of 27.1); use 'cl-loop' instead.

Error on Debian 13:

Warning (bytecomp): 'loop' is an obsolete alias (as of 27.1); use 'cl-loop' instead.

Unfortunately emacs does not show a stack trace, see https://emacs.stackexchange.com/q/13532/12191.

Finding the culprit:

$ cd .config/emacs
$ ag --el loop|grep -v cl-loop|grep loop
elpa/yaxception-20150105.1452/yaxception.el:390:  (loop for s in (apropos-internal "^[a-z\\-:/]+$")
elpa/genrnc-20140612.1237/genrnc.el:302:  (loop for f in (list genrnc--trang-jar-name genrnc--xsd2rng-jar-name genrnc--xsd2rng-xsl-name)
elpa/yaxception-20150105.1540/yaxception.el:172:        (loop for e in catch_or_finally

After that I simply removed genrnc and yaxception.