1 files changed, 59 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/module_write_1.f90 b/gcc/testsuite/gfortran.dg/module_write_1.f90
new file mode 100644
index 000000000..3b488ce55
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/module_write_1.f90
@@ -0,0 +1,59 @@
+! { dg-do compile }
+!
+! PR fortran/41869
+!
+! Was ICEing while module write of symbol 'vs_str' in m_dom_dom
+! because of "len" being private in fox_m_fsys_format.
+!
+module fox_m_fsys_array_str
+contains
+  pure function str_vs(vs) result(s)
+    character, dimension(:), intent(in) :: vs
+    character(len=size(vs)) :: s
+    s = transfer(vs, s)
+  end function str_vs
+  pure function vs_str(s) result(vs)
+    character(len=*), intent(in) :: s
+    character, dimension(len(s)) :: vs
+    vs = transfer(s, vs)
+  end function vs_str
+end module fox_m_fsys_array_str
+
+module fox_m_fsys_format
+  private
+  interface str
+    module procedure  str_logical_array
+  end interface str
+  interface len
+    module procedure str_logical_array_len
+  end interface
+  public :: str
+contains
+  pure function str_logical_array_len(la) result(n)
+    logical, dimension(:), intent(in)   :: la
+  end function str_logical_array_len
+  pure function str_logical_array(la) result(s)
+    logical, dimension(:), intent(in)   :: la
+    character(len=len(la)) :: s
+  end function str_logical_array
+  pure function checkFmt(fmt) result(good)
+    character(len=*), intent(in) :: fmt
+    logical :: good
+    good = len(fmt) > 0
+  end function checkFmt
+end module fox_m_fsys_format
+
+module m_dom_dom
+  use fox_m_fsys_array_str, only: str_vs, vs_str
+end module m_dom_dom
+
+module FoX_dom
+  use fox_m_fsys_format
+  use m_dom_dom
+end module FoX_dom
+
+use FoX_dom
+implicit none
+print *, vs_str("ABC")
+end
+! { dg-final { cleanup-modules "fox_m_fsys_array_str fox_m_fsys_format m_dom_dom fox_dom" } }