From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Fri, 5 Feb 2021 16:31:11 +0000 (-0700)
Subject: Avoid using a function in a context in which it makes no sense.
X-Git-Tag: v9.3.0-rc1~491^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=125fdbdf4dd174388cf9467e58de7a7c151bad77;p=dealii.git

Avoid using a function in a context in which it makes no sense.
---

diff --git a/source/grid/tria.cc b/source/grid/tria.cc
index b209875d17..42c6d73a6a 100644
--- a/source/grid/tria.cc
+++ b/source/grid/tria.cc
@@ -13528,8 +13528,11 @@ template <int dim, int spacedim>
 bool
 Triangulation<dim, spacedim>::all_reference_cells_are_hyper_cube() const
 {
-  return (this->reference_cells.size() == 0) ||
-         (this->reference_cells.size() == 1 &&
+  Assert(this->reference_cells.size() > 0,
+         ExcMessage("You can't ask about the kinds of reference "
+                    "cells used by this triangulation if the "
+                    "triangulation doesn't yet have any cells in it."));
+  return (this->reference_cells.size() == 1 &&
           this->reference_cells[0] == ReferenceCell::get_hypercube<dim>());
 }