[asdf-devel] CMUCL error with 20c

[Orivej Desh]

Not being strictly related, it might be of some value to know that ABCL
1.0.1 fails with a similar error while loading some systems (not the
testsuite; I noticed ironclad) because of a bug in a CLOS implementation
which prevented %component-encoding from appearing in some components,
but which was fixed in 1.1.0-dev (so I didn't try to find when it was
fixed).