re PR fortran/79230 ([OOP] Run time error: double free or corruption)

gcc/fortran/ChangeLog:

2017-02-05  Andre Vehreschild  <vehre@gcc.gnu.org>

	PR fortran/79230
	* trans-array.c (structure_alloc_comps): Ignore pointer components when
	freeing structures.

gcc/testsuite/ChangeLog:

2017-02-05  Andre Vehreschild  <vehre@gcc.gnu.org>

	PR fortran/79230
	* gfortran.dg/der_ptr_component_2.f90: New test.

From-SVN: r245191

gcc/fortran/ChangeLog

+2017-02-05  Andre Vehreschild  <vehre@gcc.gnu.org>
+
+	PR fortran/79230
+	* trans-array.c (structure_alloc_comps): Ignore pointer components when
+	freeing structures.
+
 2017-01-25  Maxim Ostapenko  <m.ostapenko@samsung.com>
 
 	PR lto/79061

gcc/fortran/trans-array.c

@@ -8220,9 +8220,17 @@ structure_alloc_comps (gfc_symbol * der_type, tree decl,
 
 	  /* Shortcut to get the attributes of the component.  */
 	  if (c->ts.type == BT_CLASS)
-	    attr = &CLASS_DATA (c)->attr;
+	    {
+	      attr = &CLASS_DATA (c)->attr;
+	      if (attr->class_pointer)
+		continue;
+	    }
 	  else
-	    attr = &c->attr;
+	    {
+	      attr = &c->attr;
+	      if (attr->pointer)
+		continue;
+	    }
 
 	  if ((c->ts.type == BT_DERIVED && !c->attr.pointer)
 	     || (c->ts.type == BT_CLASS && !CLASS_DATA (c)->attr.class_pointer))

gcc/testsuite/ChangeLog

+2017-02-05  Andre Vehreschild  <vehre@gcc.gnu.org>
+
+	PR fortran/79230
+	* gfortran.dg/der_ptr_component_2.f90: New test.
+
 2017-02-05  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc.target/sparc/20170205-1.c: New test.

gcc/testsuite/gfortran.dg/der_ptr_component_2.f90

+! { dg-do run }
+!
+! Freeing the width_data lead to double free. This testcase tests that
+! pr79230 is fixed now.
+
+program main_ut
+  implicit none
+
+  type :: data_t
+     character, allocatable :: c1
+  end type
+
+  type :: t1_t
+     character, allocatable :: c2
+     class(data_t), pointer :: width_data
+  end type
+
+  call evaluator
+
+contains
+
+  subroutine evaluator
+    type(data_t), target :: par_real
+    type(t1_t) :: field
+    field%width_data => par_real
+  end subroutine
+
+end
+
+