gcc/testsuite/gfortran.dg/null_2.f90

   1 ! { dg-do compile }
   2 !
   3 ! NULL(...) pointer is not allowed as operand
   4 ! PR fortran/20888
   5 !
   6 ! Contributed by Joost VandeVondele
   7 !
   8 PROGRAM main
   9   IMPLICIT NONE
  10   REAL, POINTER :: TEST
  11   NULLIFY(TEST)
  12   TEST => -NULL(TEST) ! { dg-error "Invalid context for NULL" }
  13   IF (TEST .EQ. NULL(TEST)) TEST=>NULL() ! { dg-error "Invalid context for NULL" }
  14   IF (NULL(TEST) .EQ. TEST) TEST=>NULL() ! { dg-error "Invalid context for NULL" }
  15 END PROGRAM main