gcc/patches/gcc-5.2.0-gfortran-ice-segfault.patch

--- a/gcc/fortran/trans-expr.c	
+++ a/gcc/fortran/trans-expr.c	
@@ -6897,6 +6897,30 @@ alloc_scalar_allocatable_for_subcomponent_assignment (stmtblock_t *block,
 				       TREE_TYPE (tmp), tmp,
 				       fold_convert (TREE_TYPE (tmp), size));
     }
+  else if (cm->ts.type == BT_CLASS)
+    {
+      gcc_assert (expr2->ts.type == BT_CLASS || expr2->ts.type == BT_DERIVED);
+      if (expr2->ts.type == BT_DERIVED)
+	{
+	  tmp = gfc_get_symbol_decl (gfc_find_vtab (&expr2->ts));
+	  tmp = gfc_build_addr_expr (NULL_TREE, tmp);
+	  size = fold_convert (size_type_node, gfc_vptr_size_get (tmp));
+	}
+      else
+	{
+	  gfc_expr *e2vtab;
+	  gfc_se se;
+	  e2vtab = gfc_find_and_cut_at_last_class_ref (expr2);
+	  gfc_add_vptr_component (e2vtab);
+	  gfc_add_size_component (e2vtab);
+	  gfc_init_se (&se, NULL);
+	  gfc_conv_expr (&se, e2vtab);
+	  gfc_add_block_to_block (block, &se.pre);
+	  size = fold_convert (size_type_node, se.expr);
+	  gfc_free_expr (e2vtab);
+	}
+      size_in_bytes = size;
+    }
   else
     {
       /* Otherwise use the length in bytes of the rhs.  */
@@ -7068,6 +7092,14 @@ gfc_trans_subcomponent_assign (tree dest, gfc_component * cm, gfc_expr * expr,
 	  tmp = gfc_build_memcpy_call (tmp, se.expr, size);
 	  gfc_add_expr_to_block (&block, tmp);
 	}
+      else if (cm->ts.type == BT_CLASS && expr->ts.type == BT_CLASS)
+	{
+	  tmp = gfc_copy_class_to_class (se.expr, dest, integer_one_node,
+				   CLASS_DATA (cm)->attr.unlimited_polymorphic);
+	  gfc_add_expr_to_block (&block, tmp);
+	  gfc_add_modify (&block, gfc_class_vptr_get (dest),
+			  gfc_class_vptr_get (se.expr));
+	}
       else
 	gfc_add_modify (&block, tmp,
 			fold_convert (TREE_TYPE (tmp), se.expr));
1	niro	2629	--- a/gcc/fortran/trans-expr.c
2			+++ a/gcc/fortran/trans-expr.c
3			@@ -6897,6 +6897,30 @@ alloc_scalar_allocatable_for_subcomponent_assignment (stmtblock_t *block,
4			TREE_TYPE (tmp), tmp,
5			fold_convert (TREE_TYPE (tmp), size));
6			}
7			+ else if (cm->ts.type == BT_CLASS)
8			+ {
9			+ gcc_assert (expr2->ts.type == BT_CLASS \|\| expr2->ts.type == BT_DERIVED);
10			+ if (expr2->ts.type == BT_DERIVED)
11			+ {
12			+ tmp = gfc_get_symbol_decl (gfc_find_vtab (&expr2->ts));
13			+ tmp = gfc_build_addr_expr (NULL_TREE, tmp);
14			+ size = fold_convert (size_type_node, gfc_vptr_size_get (tmp));
15			+ }
16			+ else
17			+ {
18			+ gfc_expr *e2vtab;
19			+ gfc_se se;
20			+ e2vtab = gfc_find_and_cut_at_last_class_ref (expr2);
21			+ gfc_add_vptr_component (e2vtab);
22			+ gfc_add_size_component (e2vtab);
23			+ gfc_init_se (&se, NULL);
24			+ gfc_conv_expr (&se, e2vtab);
25			+ gfc_add_block_to_block (block, &se.pre);
26			+ size = fold_convert (size_type_node, se.expr);
27			+ gfc_free_expr (e2vtab);
28			+ }
29			+ size_in_bytes = size;
30			+ }
31			else
32			{
33			/* Otherwise use the length in bytes of the rhs. */
34			@@ -7068,6 +7092,14 @@ gfc_trans_subcomponent_assign (tree dest, gfc_component * cm, gfc_expr * expr,
35			tmp = gfc_build_memcpy_call (tmp, se.expr, size);
36			gfc_add_expr_to_block (&block, tmp);
37			}
38			+ else if (cm->ts.type == BT_CLASS && expr->ts.type == BT_CLASS)
39			+ {
40			+ tmp = gfc_copy_class_to_class (se.expr, dest, integer_one_node,
41			+ CLASS_DATA (cm)->attr.unlimited_polymorphic);
42			+ gfc_add_expr_to_block (&block, tmp);
43			+ gfc_add_modify (&block, gfc_class_vptr_get (dest),
44			+ gfc_class_vptr_get (se.expr));
45			+ }
46			else
47			gfc_add_modify (&block, tmp,
48			fold_convert (TREE_TYPE (tmp), se.expr));