This is not a bug, I think. It's only warnings appeared when invoking stumpwm. It said:
You are using ASDF version 3.3.1 (probably from (require "asdf") or loaded
by quicklisp) and have an older version of ASDF (and older than 2.27 at
that) registered at #P"/usr/local/lib/common-lisp/asdf/asdf.asd". Having an
ASDF installed and registered is the normal way of configuring ASDF to
upgrade itself, and having an old version registered is a configuration
error. ASDF will ignore this configured system rather than downgrade itself.
In the future, you may want to either: (a) upgrade this configured ASDF to a
newer version, (b) install a newer ASDF and register it in front of the
former in your configuration, or (c) uninstall or unregister this and any
other old version of ASDF from your configuration. Note that the older ASDF
might be registered implicitly through configuration inherited from your
system installation, in which case you might have to specify
:ignore-inherited-configuration in your in your
~/.config/common-lisp/source-registry.conf or other source-registry
configuration file, environment variable or lisp parameter. Indeed, a likely
offender is an obsolete version of the cl-asdf debian or ubuntu package,
that you might want to upgrade (if a recent enough version is available) or
else remove altogether (since most implementations ship with a recent asdf);
if you lack the system administration rights to upgrade or remove this
package, then you might indeed want to either install and register a more
recent version, or use :ignore-inherited-configuration to avoid registering
the old one. Please consult ASDF documentation and/or experts.
WARNING: System definition file #P"/usr/local/lib/common-lisp/cl-ppcre/cl-ppcre.
asd" contains definition for system "cl-ppcre-test". Please only define "cl-ppcr
e" and secondary systems with a name starting with "cl-ppcre/" (e.g. "cl-ppcre/t
est") in that file.
I even don't know if it's related with stumpwm. I run maxima and sbcl, no warnings appear.
Is it possible to eliminate them? Thanks!