Don't crash on array type with erroneous length expression.

From-SVN: r168176

diff --git a/gcc/go/gofrontend/types.cc b/gcc/go/gofrontend/types.cc
index c0914cac78e520f0c358b600832d9b32b5137362..7a9bfc74028403a8871f6219472afe569cd5e335 100644 (file)
--- a/gcc/go/gofrontend/types.cc
+++ b/gcc/go/gofrontend/types.cc
@@ -4359,8 +4359,12 @@ Array_type::get_length_tree(Gogo* gogo)
          // expression.  FIXME: This won't work in general.
          Translate_context context(gogo, NULL, NULL, NULL_TREE);
          tree len = this->length_->get_tree(&context);
-         len = convert_to_integer(integer_type_node, len);
-         this->length_tree_ = save_expr(len);
+         if (len != error_mark_node)
+           {
+             len = convert_to_integer(integer_type_node, len);
+             len = save_expr(len);
+           }
+         this->length_tree_ = len;
        }
     }
   return this->length_tree_;