Backtrace:
In unknown file:
   ?:  9  (let ((full-name #)) (let (#) (if already # #)))
    ...
   ?: 10  (begin (if # #) (make-modules-in # full-name))
   ?: 11* (if (or # #) (try-load-module name))
   ?: 12  [try-load-module (gnucash report standard-reports)]
   ?: 13  (or (begin (try-module-linked name)) (try-module-autoload name) ...)
   ?: 14* [try-module-autoload (gnucash report standard-reports)]
   ?: 15  (let* (# # # #) (resolve-module dir-hint-module-name #f) (and # #))
    ...
   ?: 16  (letrec ((load-file #)) (dynamic-wind (lambda () #) (lambda () #) ...) ...)
   ?: 17* [dynamic-wind #<procedure #f ()> #<procedure #f ()> #<procedure #f ()>]
   ?: 18* [#<procedure #f ()>]
   ?: 19* (let ((file #)) (cond (# => #) (# => #)))
   ?: 20  [#<procedure #f #> "/home/me/unstable/gnucash/share/gnucash/guil$
   ?: 21  [load-file #<primitive-procedure primitive-load> ...]
   ?: 22* [save-module-excursion #<procedure #f ()>]
   ?: 23  (let (# #) (dynamic-wind # thunk #))
   ?: 24  [dynamic-wind #<procedure #f ()> #<procedure #f ()> #<procedure #f ()>]
   ?: 25* [#<procedure #f ()>]
   ?: 26* [primitive-load "/home/me/unstable/gnucash/share/gnucash/guile-m$
In /home/me/unstable/gnucash/share/gnucash/guile-modules/gnucash/report/standard-reports.scm:
 160: 27* (define gnc:register-report-create-internal #)
 160: 28* (@ # gnc:register-report-create-internal)

/home/me/unstable/gnucash/share/gnucash/guile-modules/gnucash/report/standard-reports.scm:160:45: In expression (@ (gnucash report standard-reports ...) gnc:register-report-create-internal):
/home/me/unstable/gnucash/share/gnucash/guile-modules/gnucash/report/standard-reports.scm:160:45: Unbound variable: @