From: Peter Munch <peterrmuench@gmail.com>
Date: Thu, 25 Mar 2021 22:02:05 +0000 (+0100)
Subject: FETools::Compositing::compute_nonzero_components(): add assert
X-Git-Tag: v9.3.0-rc1~241^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F11965%2Fhead;p=dealii.git

FETools::Compositing::compute_nonzero_components(): add assert
---

diff --git a/include/deal.II/fe/fe_tools.templates.h b/include/deal.II/fe/fe_tools.templates.h
index 48512f06fc..ee985f56ea 100644
--- a/include/deal.II/fe/fe_tools.templates.h
+++ b/include/deal.II/fe/fe_tools.templates.h
@@ -375,7 +375,10 @@ namespace FETools
       const bool do_tensor_product)
     {
       AssertDimension(fes.size(), multiplicities.size());
-
+      Assert(
+        fes.size() > 0,
+        ExcMessage(
+          "This function only makes sense if at least one FiniteElement is provided."));
       // first count the number of dofs and components that will emerge from the
       // given FEs
       unsigned int n_shape_functions = 0;