From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Sun, 26 Dec 2021 17:58:25 +0000 (-0700)
Subject: Add an assertion to GridGenerator::flatten_triangulation().
X-Git-Tag: v9.4.0-rc1~706^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F13132%2Fhead;p=dealii.git

Add an assertion to GridGenerator::flatten_triangulation().
---

diff --git a/source/grid/grid_generator.cc b/source/grid/grid_generator.cc
index b47c8a7a6e..2e2444664e 100644
--- a/source/grid/grid_generator.cc
+++ b/source/grid/grid_generator.cc
@@ -7500,6 +7500,9 @@ namespace GridGenerator
            ExcMessage(
              "This function cannot be used on "
              "parallel::distributed::Triangulation objects as inputs."));
+    Assert(in_tria.has_hanging_nodes() == false,
+           ExcMessage("This function does not work for meshes that have "
+                      "hanging nodes."));
 
 
     const unsigned int spacedim = std::min(spacedim1, spacedim2);