gcc/testsuite/gfortran.dg/used_dummy_types_6.f90

   1 ! { dg-do compile }
   2 ! Tests the fix for PR30554, the USE statements in potential_energy
   3 ! would cause a segfault because the pointer_info for nfree coming
   4 ! from constraint would not find the existing symtree coming directly
   5 ! from atom.
   6 !
   7 ! The last two modules came up subsequently to the original fix.  The
   8 ! PRIVATE statement caused a revival of the original problem.  This
   9 ! was tracked down to an interaction between the symbols being set
  10 ! referenced during module read and the application of the access
  11 ! attribute.
  12 !
  13 ! Contributed by Tobias Burnus <burnus@gcc.gnu.org>
  14
  15 MODULE ATOMS
  16 INTEGER :: NFREE = 0
  17 END MODULE ATOMS
  18
  19 MODULE CONSTRAINT
  20 USE ATOMS, ONLY: NFREE
  21 CONTAINS
  22    SUBROUTINE ENERGY_CONSTRAINT ( HESSIAN )
  23    REAL , DIMENSION(1:(3*NFREE*(3*NFREE+1))/2):: HESSIAN
  24    END SUBROUTINE ENERGY_CONSTRAINT
  25 END MODULE CONSTRAINT
  26
  27 MODULE POTENTIAL_ENERGY
  28 USE ATOMS
  29 USE CONSTRAINT,         ONLY : ENERGY_CONSTRAINT
  30 END MODULE POTENTIAL_ENERGY
  31
  32 MODULE P_CONSTRAINT
  33 USE ATOMS, ONLY: NFREE
  34 PRIVATE
  35 PUBLIC :: ENERGY_CONSTRAINT
  36 CONTAINS
  37    SUBROUTINE ENERGY_CONSTRAINT ( HESSIAN )
  38    REAL , DIMENSION(1:(3*NFREE*(3*NFREE+1))/2):: HESSIAN
  39    END SUBROUTINE ENERGY_CONSTRAINT
  40 END MODULE P_CONSTRAINT
  41
  42 MODULE P_POTENTIAL_ENERGY
  43 USE ATOMS
  44 USE CONSTRAINT,         ONLY : ENERGY_CONSTRAINT
  45 END MODULE P_POTENTIAL_ENERGY