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+! { dg-do run }
+! { dg-options "-Wreturn-type" }
+! PR fortran/33941
+! The problem was that the intrinsic operators
+! were written to the module file as '/=' etc.
+! but this format was not understood on reading.
+!
+! Test case by Toby White, stripped down by
+! Dominique d'Humieres and Francois-Xavier Coudert
+
+module foo
+contains
+  function pop(n) result(item)          ! { dg-warning "not set" }
+    integer :: n
+    character(len=merge(1, 0, n > 0)) :: item
+  end function pop
+  function push(n) result(item)         ! { dg-warning "not set" }
+    integer :: n
+    character(len=merge(1, 0, n /= 0)) :: item
+  end function push
+end module foo
+
+program test
+  use foo
+  if(len(pop(0)) /= 0) call abort()
+  if(len(pop(1)) /= 1) call abort()
+  if(len(push(0)) /= 0) call abort()
+  if(len(push(1)) /= 1) call abort()
+end program
+! { dg-final { cleanup-modules "foo" } }