ERROR: undefined-find-nth m n seq quot ;
: check-trivial-find ( m n seq quot -- m n seq quot )
- pick 0 = [ throw-undefined-find-nth ] when ; inline
+ pick 0 = [ undefined-find-nth ] when ; inline
: find-nth-from ( m n seq quot -- i/f elt/f )
check-trivial-find [ f ] 3dip '[