(header ((h) ihello provides) ((sut) illegal_silent component) ((w) iworld requires))
<external>.h.hello -> ...
... -> sut.h.hello
sut.w.hello -> ...
... -> <external>.w.hello
... <- <external>.w.return
sut.w.return <- ...
... <- sut.h.return
<external>.h.return <- ...
(trail "h.hello" "w.hello" "w.return" "h.return")
test/all/illegal_silent/illegal_silent.dzn:56:20: error: illegal
<external>.h.hello -> ...
... -> sut.h.hello
sut.w.cruel -> ...
... -> <external>.w.cruel
<illegal>
test/all/illegal_silent/illegal_silent.dzn:56:20: error: illegal
(trail "h.hello" "w.cruel" "<illegal>")
(labels "h.hello")
(eligible)
