gistfile1.txt

akren:~ % guile3 -q 
GNU Guile 3.0.7

scheme@(guile-user)> (load "tst.scm")
;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
;;;       or pass the --no-auto-compile argument to disable.
;;; compiling /home/andrew/tst.scm
WARNING: (gentst): `foo' imported from both (gentst1) and (gentst2)
;;; compiled /home/andrew/.cache/guile/ccache/3.0-LE-8-4.5/home/andrew/tst.scm.go
#<<generic> foo (1)>ice-9/boot-9.scm:1685:16: In procedure raise-exception:
No applicable method for #<<generic> foo (1)> in call (foo #<<gentst1> 8049eef30>)

Entering a new prompt.  Type `,bt' for a backtrace or `,q' to continue.

tst.scm

(use-modules (oop goops))
(default-duplicate-binding-handler '(merge-generics replace warn-override-core warn last))

(add-to-load-path (dirname (current-filename)))

(use-modules (gentst))

(display foo)
(test)