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+! { dg-do compile }
+!
+! PR fortran/39290
+! Subroutine/function ambiguity in generics.
+!
+ interface q
+ subroutine qr(f)
+ implicit real(f)
+ external f
+ end subroutine
+ subroutine qc(f)
+ implicit complex(f)
+ external f
+ end subroutine ! { dg-error "Ambiguous interfaces" }
+ end interface q
+ end