Don't crash on erroneous result variable.

Fixes issue 1320.

From-SVN: r167573

diff --git a/gcc/go/gofrontend/gogo-tree.cc b/gcc/go/gofrontend/gogo-tree.cc
index 41e621e2c90e2334c04bf12017ead1a5eef90d16..09f0d7cbd8cac744c12c93f9db8471a5b6873eaa 100644 (file)
--- a/gcc/go/gofrontend/gogo-tree.cc
+++ b/gcc/go/gofrontend/gogo-tree.cc
@@ -1550,14 +1550,18 @@ Function::build_tree(Gogo* gogo, Named_object* named_function)
       else if ((*p)->is_result_variable())
        {
          tree var_decl = (*p)->get_tree(gogo, named_function);
-         if ((*p)->result_var_value()->is_in_heap())
+         if (var_decl != error_mark_node
+             && (*p)->result_var_value()->is_in_heap())
            {
              gcc_assert(TREE_CODE(var_decl) == INDIRECT_REF);
              var_decl = TREE_OPERAND(var_decl, 0);
            }
-         gcc_assert(TREE_CODE(var_decl) == VAR_DECL);
-         DECL_CHAIN(var_decl) = declare_vars;
-         declare_vars = var_decl;
+         if (var_decl != error_mark_node)
+           {
+             gcc_assert(TREE_CODE(var_decl) == VAR_DECL);
+             DECL_CHAIN(var_decl) = declare_vars;
+             declare_vars = var_decl;
+           }
        }
     }
   *pp = NULL_TREE;