I found an easy to reproduce error. I don't think I can add much else other than showing you the command to trigger it:

CL-USER> (lisp-implementation-version)
"1.2.2.83-0a62cf4"
CL-USER> (sb-introspect:find-function-callees (find-method #'print-object () '(t t)))
Unhandled memory fault at #x0.
   [Condition of type SB-SYS:MEMORY-FAULT-ERROR]

Regards,
Elias