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diff --git a/gcc/testsuite/gfortran.dg/whole_file_11.f90 b/gcc/testsuite/gfortran.dg/whole_file_11.f90
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+++ b/gcc/testsuite/gfortran.dg/whole_file_11.f90
@@ -0,0 +1,39 @@
+! { dg-do compile }
+! { dg-options "-fwhole-file" }
+!
+! Tests the fix PR40011 comment 16 in which the derived type lists in
+! different program units were getting mixed up.
+!
+! Contributed by Daniel Franck  <dfranke@gcc.gnu.org>
+!
+MODULE module_foo
+  TYPE :: foo_node
+    TYPE(foo_node_private), POINTER :: p
+  END TYPE
+
+  TYPE :: foo_node_private
+    TYPE(foo_node), DIMENSION(-1:1) :: link
+  END TYPE
+
+  TYPE :: foo
+    TYPE(foo_node) :: root
+  END TYPE
+END MODULE
+
+FUNCTION foo_insert()
+  USE module_foo, ONLY: foo, foo_node
+
+  INTEGER :: foo_insert
+  TYPE(foo_node) :: parent, current
+  INTEGER :: cmp
+
+  parent  = current
+  current = current%p%link(cmp)
+END FUNCTION
+
+FUNCTION foo_count()
+  USE module_foo, ONLY: foo
+  INTEGER :: foo_count
+END FUNCTION
+
+! { dg-final { cleanup-modules "module_foo" } }