17a591a4aSRichard Smithmodule X {
27a591a4aSRichard Smith  module A { header "a.h" }
37a591a4aSRichard Smith  module B { header "b.h" }
47a591a4aSRichard Smith}
5*6561f92bSRichard Smithmodule Y {
6*6561f92bSRichard Smith  module C { header "c.h" }
7*6561f92bSRichard Smith  module D { header "d.h" }
8*6561f92bSRichard Smith}
9