flang/test/Semantics/modfile54.f90

! RUN: %python %S/test_errors.py %s %flang_fc1 -pedantic
!ERROR: Some modules in this compilation unit form one or more cycles of dependence
module m1
  use m2
end

!PORTABILITY: A USE statement referencing module 'm2' appears earlier in this compilation unit
module m2
  use m3
end

!PORTABILITY: A USE statement referencing module 'm3' appears earlier in this compilation unit
module m3
  use m1
end