byte-compile of ecb-snap fails

stack backtrace follows (i'm on emacs-23.2)

 Debugger entered--Lisp error: (void-variable warning-suppress-types)
  display-warning(bytecomp "Symbol's value as variable is void: filename"
:error "*Compile-Log*")
  byte-compile-log-warning("Symbol's value as variable is void: filename"
nil :error)
  byte-compile-report-error((void-variable filename))
  byte-compile-from-buffer(#<buffer  *Compiler Input*>
"/home/t.brannan/emacs-contrib/ecb-snap/ecb-analyse.el")
  byte-compile-file("/home/t.brannan/emacs-contrib/ecb-snap/ecb-analyse.el")
  (if (or force (not ...) (file-newer-than-file-p file elc-file))
(byte-compile-file file))
  (let ((elc-file ...)) (if (or force ... ...) (byte-compile-file file)))

ecb-compile-file-if-necessary("/home/t.brannan/emacs-contrib/ecb-snap/ecb-analyse.el"
nil)
  (if (save-match-data (and ... ...)) (ecb-compile-file-if-necessary file
force-all))
  (while --cl-dolist-temp-- (setq file (car --cl-dolist-temp--)) (if
(save-match-data ...) (ecb-compile-file-if-necessary file force-all)) (setq
--cl-dolist-temp-- (cdr --cl-dolist-temp--)))
  (let ((--cl-dolist-temp-- files) file) (while --cl-dolist-temp-- (setq
file ...) (if ... ...) (setq --cl-dolist-temp-- ...)) nil)
  (catch (quote --cl-block-nil--) (let (... file) (while --cl-dolist-temp--
... ... ...) nil))
  (cl-block-wrapper (catch (quote --cl-block-nil--) (let ... ... nil)))
  (block nil (let (... file) (while --cl-dolist-temp-- ... ... ...) nil))
  (dolist (file files) (if (save-match-data ...)
(ecb-compile-file-if-necessary file force-all)))
  (save-excursion (dolist (file files) (if ... ...)))
  (let ((files ...)) (save-excursion (dolist ... ...)))
  ecb-byte-compile(nil)
  call-interactively(ecb-byte-compile t nil)
  execute-extended-command(nil)
  call-interactively(execute-extended-command nil nil)
  recursive-edit()
  byte-code("\306
@\307=\203!\310\311\312\"\210\313\311!\211A@)\242\314=\203!\310\315\312\"\210\316
!\210\317 \210\320 !\210\f\203d\321ed\"
V\203Web\210\322
\245y\210`db\210\322
\245
Zy\210`|\210)\323c\210eb\210\324\325\326
\"\210\327\306!\210\324\330!\210\331\312\324\330!\210\212\332
\210+\331\207" [unread-command-char debugger-args x debugger-buffer
noninteractive debugger-batch-max-lines -1 debug backtrace-debug 4 t
backtrace-frame lambda 5 pop-to-buffer debugger-mode debugger-setup-buffer
count-lines 2 "...\n" message "%s" buffer-string kill-emacs "" nil
recursive-edit middlestart buffer-read-only standard-output] 4)
  debug(error (error "Attempt to insert a non-directory:
/scp:[email protected]:
/usr/local/vwh/library/perl/Nimbus/Product/Registration.pm/"))
  signal(error ("Attempt to insert a non-directory:
/scp:[email protected]:
/usr/local/vwh/library/perl/Nimbus/Product/Registration.pm/"))
  error("Attempt to insert a non-directory: %s"
"/scp:[email protected]:
/usr/local/vwh/library/perl/Nimbus/Product/Registration.pm/")
  dired-insert-subdir("/scp:[email protected]:/usr/local/vwh/library/perl/Nimbus/Product/Registration.pm/"
nil nil)
  dired-maybe-insert-subdir("/scp:[email protected]:/usr/local/vwh/library/perl/Nimbus/Product/Registration.pm"
nil)
  call-interactively(dired-maybe-insert-subdir nil nil)

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