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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/64209] [OOP] runtime segfault with CLASS(*), INTENT(OUT) dummy argument
Date: Thu, 18 Dec 2014 22:07:00 -0000
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X-Bugzilla-Who: janus at gcc dot gnu.org
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64209

janus at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |janus at gcc dot gnu.org

--- Comment #4 from janus at gcc dot gnu.org ---
The following patch is sufficient to make the reduced test case in comment 2
work:


Index: gcc/fortran/trans-expr.c
===================================================================
--- gcc/fortran/trans-expr.c    (Revision 218874)
+++ gcc/fortran/trans-expr.c    (Arbeitskopie)
@@ -980,6 +980,9 @@ gfc_trans_class_init_assign (gfc_code *code)
       src.expr = gfc_build_addr_expr (NULL_TREE, src.expr);

       tmp = gfc_build_memcpy_call (dst.expr, src.expr, memsz.expr);
+
+      tmp = build3_loc (input_location, COND_EXPR, TREE_TYPE (tmp),
+            src.expr, tmp, build_empty_stmt (input_location));
     }

   if (code->expr1->symtree->n.sym->attr.optional


However, the original test case in comment 0 still segfaults, so there seems to
be yet another problem.