https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70949

--- Comment #1 from Gerhard Steinmetz <gerhard.steinmetz.fort...@t-online.de> 
---
This variant works :
(as known from several other PRs : change "class" to "type")


$ cat z2.f90
program p
   type t1
   end type
   type t2
      type(t1), pointer :: q
   end type
   type(t1), pointer :: a
   type(t2) :: c

   allocate(a)
   c%q => a
   print *, 'a', associated(a, f(c))

contains

   function f(x) result (z)
      type(t2), intent(in) :: x
      type(t1), pointer :: z
      z => x%q
   end
end

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