gcc/testsuite/gfortran.dg/derived_recursion.f90

   1 ! { dg-do compile }
   2 ! { dg-options "-O0" }
   3 ! Tests patch for PR24158 - The module would compile, in spite
   4 ! of the recursion between the derived types. This would cause
   5 ! an ICE in the commented out main program. The standard demands
   6 ! that derived type components be already defined, to break
   7 ! recursive derived type definitions.
   8 !
   9 ! Contributed by Paul Thomas <pault@gcc.gnu.org>
  10 !
  11 module snafu
  12   type       ::   a
  13     integer    :: v
  14     type(b)    :: i ! { dg-error "not been previously defined" }
  15   end type a
  16   type       ::   b
  17     type(a)    :: i
  18   end type b
  19   type (a)   :: foo
  20 end module snafu
  21
  22 !  use snafu
  23 !  foo%v = 1
  24 !  end