Predicate instance? in Guile 2.2.3 doesn't work for non-struct objects.
In order to reproduce the bug give the following commands in Guile: ---cut here--- (import (oop goops)) (instance? 1) ---cut here--- The actual output is: ---cut here---<unnamed port>:2:0: In procedure struct_vtable: Wrong type argument in position 1 (expecting struct): 1
Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue. ---cut here--- I use Guile on Ubuntu 18.04. - Tommi Höynälänmaa
