Mine

Backtrace:
In current input:
   1: 0* [gnc:report-menu-setup]
   ?: 1  (letrec (# # # ...) (gnc:add-extension income-expense-menu) ...)
In /opt/gnome/share/gnucash/guile-modules/gnucash/report/report-gnome.scm:
 118: 2* [gnc:hook-run-danglers "hook_report" . {#f}]
In /opt/gnome/share/gnucash/scm/hooks.scm:
  22: 3  [gnc:hook-run-danglers-real "hook_report" {#f}]

/opt/gnome/share/gnucash/scm/hooks.scm:22:3: In procedure gnc:hook-run-danglers-real in expression (gnc:hook-run-danglers-real hook args):
/opt/gnome/share/gnucash/scm/hooks.scm:22:3: Wrong type argument in position 2: #f