Gnucash busted

[Jonathan Corbet]

I've been using the gnucash development releases in Fedora without
trouble - until recently.  Now, on startup, it gives me:

Backtrace:
In current input:
   1: 0* [gnc:main]
In /usr/share/gnucash/guile-modules/gnucash/main.scm:
 241: 1  (if (not (gnc:handle-command-line-args)) (gnc:shutdown 1))
 241: 2* [not ...
 241: 3*  [gnc:handle-command-line-args]
In /usr/share/gnucash/scm/command-line.scm:
 187: 4   (let ((remaining-arguments #) (result #t)) (do (# # #) (#) ...) ...)
 190: 5*  (do ((rest (cdr #)) (quit? #f) (item #f)) ((or quit? (null? rest))) ...)
 199: 6*  (if (not #) (begin # # #) (if # # #))
 199: 7*  [not ...
 199: 8*   [string=? "--" ...
 200: 9*    (make-shared-substring item 0 (min (string-length item) 2))

/usr/share/gnucash/scm/command-line.scm:200:26: In expression (make-shared-substring item 0 ...):
/usr/share/gnucash/scm/command-line.scm:200:26: Unbound variable: make-shared-substring

Both 1.9.5 and 1.9.6 have done this.  Is something generally broken, or
is this a bit of special behavior just for me?

Thanks,

jon