nightly build error

[<don...@is...>]

...
;;  Loaded file /home/clisp-build/clisp/src/clos-class4.lisp
;;  Loading file /home/clisp-build/clisp/src/clos-class5.lisp ...
WARNING:
DEFGENERIC: redefining function SHARED-INITIALIZE in /home/clisp-build/clisp/src/clos-class5.lisp, was defined in top-level
*** - EVAL: undefined function WARN-IF-GF-ALREADY-CALLED
Bye.
make: *** [interpreted.mem] Error 1