problem with SBCL 1.0.6/7: don't know how to dump #<STANDARD-METHOD

I ran into a problem with SBCL 1.0.6/7 (haven't tried earlier).  Below
is the abbreviated build output and the steps I took to produce it.

mkennedy@azathoth:~/clg/systems$ sbcl --no-userinit --no-sysinit
This is SBCL 1.0.7, an implementation of ANSI Common Lisp.
More information about SBCL is available at <http://www.sbcl.org/>.

SBCL is free software, provided as is, with absolutely no warranty.
It is mostly in the public domain; some portions are provided under
BSD-style licenses.  See the CREDITS and COPYING files in the
distribution for more information.
* (require :asdf)

("ASDF")
*      (setf
         (logical-pathname-translations "clg")
         '(("**;*.*.*" "/home/mkennedy/clg/**/")))

(("**;*.*.*" "/home/mkennedy/clg/**/"))

* (asdf:oos 'asdf:load-op :gtk)

; loading system definition from /home/mkennedy/clg/systems/gtk.asd into
; #<PACKAGE "ASDF0">
; loading system definition from /home/mkennedy/clg/systems/clg-tools.asd into
; #<PACKAGE "ASDF1">
; registering #<SYSTEM CLG-TOOLS {ADA8071}> as CLG-TOOLS
; loading system definition from /usr/local/lib/sbcl/sb-posix/sb-posix.asd into
; #<PACKAGE "ASDF1">
; loading system definition from /usr/local/lib/sbcl/sb-grovel/sb-grovel.asd
; into #<PACKAGE "ASDF2">
; registering #<SYSTEM SB-GROVEL {B0B38A9}> as SB-GROVEL
; registering #<SYSTEM SB-POSIX {B0DCC51}> as SB-POSIX
; registering #<SYSTEM SB-POSIX-TESTS {B2130A1}> as SB-POSIX-TESTS
STYLE-WARNING: Couldn't grovel for SIGEMT (unknown to the C compiler).
STYLE-WARNING: Couldn't grovel for SIGINFO (unknown to the C compiler).
STYLE-WARNING: Couldn't grovel for O_NOFOLLOW (unknown to the C compiler).
...
; /home/mkennedy/clg/gffi/virtual-slots.fasl written
; compilation finished in 0:00:01
; compiling file "/home/mkennedy/clg/gffi/proxy.lisp" (written 20 JUN
2007 06:13:45 AM):
; compiling (IN-PACKAGE "GFFI")
; compiling (DEFVAR *INSTANCE-CACHE* ...)
; compiling (DEFUN CACHE-INSTANCE ...)
; compiling (DEFUN FIND-CACHED-INSTANCE ...)
; compiling (DEFUN INSTANCE-CACHED-P ...)
; compiling (DEFUN REMOVE-CACHED-INSTANCE ...)
; compiling (DEFUN LIST-CACHED-INSTANCES ...)
; compiling (DEFVAR *INVALIDATED-INSTANCE-CACHE* ...)
; compiling (DEFUN CACHE-INVALIDATED-INSTANCE ...)
; compiling (DEFUN FIND-INVALIDATED-INSTANCE ...)
; compiling (DEFUN LIST-INVALIDATED-INSTANCES ...)
; compiling (DEFVAR *FOREIGN-INSTANCE-LOCATIONS* ...)
; compiling (DEFCLASS PROXY ...)
; compiling (DEFGENERIC INSTANCE-FINALIZER ...)
; compiling (DEFGENERIC REFERENCE-FUNCTION ...)
; compiling (DEFGENERIC UNREFERENCE-FUNCTION ...)
; compiling (DEFGENERIC INVALIDATE-INSTANCE ...)
; compiling (DEFGENERIC ALLOCATE-FOREIGN ...)
; compiling (DEFUN FOREIGN-LOCATION ...)
; compiling (DEFUN (SETF FOREIGN-LOCATION) ...)
; compiling (DEFUN PROXY-VALID-P ...)
; compiling (DEFMETHOD REFERENCE-FUNCTION ...)
; compiling (DEFMETHOD UNREFERENCE-FUNCTION ...)
; compiling (DEFMETHOD PRINT-OBJECT ...)
; compiling (DEFMETHOD INITIALIZE-INSTANCE ...)
; compiling (DEFMETHOD INSTANCE-FINALIZER ...)
; compiling (DEFMETHOD INSTANCE-FINALIZER ...)
; compiling (DEFMETHOD INVALIDATE-INSTANCE ...)
; compiling (DEFCLASS PROXY-CLASS ...)
; compiling (DEFCLASS DIRECT-ALIEN-SLOT-DEFINITION ...)
; compiling (DEFCLASS EFFECTIVE-ALIEN-SLOT-DEFINITION ...)
; compiling (DEFCLASS DIRECT-VIRTUAL-ALIEN-SLOT-DEFINITION ...)
; compiling (DEFCLASS EFFECTIVE-VIRTUAL-ALIEN-SLOT-DEFINITION ...)
; compiling (DEFGENERIC FOREIGN-SIZE-P ...)
; compiling (DEFGENERIC MOST-SPECIFIC-PROXY-SUPERCLASS ...)
; compiling (DEFGENERIC DIRECT-PROXY-SUPERCLASS ...)
; compiling (DEFMETHOD FOREIGN-SIZE-P ...)
; compiling (DEFMETHOD MOST-SPECIFIC-PROXY-SUPERCLASS ...)
; compiling (DEFMETHOD DIRECT-PROXY-SUPERCLASS ...)
; compiling (DEFMETHOD SHARED-INITIALIZE ...);
; caught ERROR:
;   don't know how to dump #<STANDARD-METHOD SHARED-INITIALIZE (PROXY-CLASS
;                                                               T)
{B6E04C1}> (default MAKE-LOAD-FORM method called).

; compiling (DEFMETHOD DIRECT-SLOT-DEFINITION-CLASS ...);

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