From: Peter Munch <peterrmuench@gmail.com>
Date: Mon, 27 Jul 2020 12:14:06 +0000 (+0200)
Subject: Add assert to connectivity.h
X-Git-Tag: v9.3.0-rc1~1247^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=71738fff0bbe61e69fd6b5c245b9f3b5b5a74bf8;p=dealii.git

Add assert to connectivity.h
---

diff --git a/include/deal.II/grid/connectivity.h b/include/deal.II/grid/connectivity.h
index 0031386b45..747450b7c1 100644
--- a/include/deal.II/grid/connectivity.h
+++ b/include/deal.II/grid/connectivity.h
@@ -1545,6 +1545,8 @@ namespace internal
     Connectivity<T>
     build_connectivity(const std::vector<CellData<dim>> &cells)
     {
+      AssertThrow(cells.size() > 0, ExcMessage("No cells have been provided!"));
+
       // vector of possible cell entity types
       std::vector<std::shared_ptr<CellTypeBase>> cell_types_impl(8);