(module foo
  ()
  (import scheme)
  (set! bar "baz")
  bar)


;csc -feature compiling-extension -setup-mode -s -d0 -O2 -S foo1.scm -j  ;foo                                                                                               ;                                                               
;
;Warning: reference to possibly unbound identifier `bar'
;
;Error: module unresolved: foo