Problem loading in SBCL on Mojave

[Patrick May]

        I’m running Mojave 10.14.2 and SBCL 1.5.0.  When I try to load CFFI, I 
get this error:

* (ql:quickload :cffi)
To load "cffi":
  Load 1 ASDF system:
    cffi
; Loading "cffi"
[package cffi-utils]..............................
[package cffi-features]...........................
[package cffi-sys]....; 
; caught ERROR:
;   READ error during COMPILE-FILE:
;   
;     Lock on package SB-ALIEN violated when interning SHARED-OBJECT-FILE while 
in
;     package CFFI-SYS.
;   See also:
;     The SBCL Manual, Node "Package Locks"
;   
;     (in form starting at line: 306, column: 0, position: 10629)

Then I’m dumped into the debugger.  The same thing occurs using 
(asdf:load-system :cffi).  I’ve cleared ~/.cache/common-lisp, but no joy.  Any 
thoughts appreciated.

Thanks,

Patrick