From: Simon Sticko <simon@sticko.se>
Date: Tue, 28 Apr 2020 15:05:19 +0000 (+0200)
Subject: Improve error message in SymmetricTensor constructor.
X-Git-Tag: v9.2.0-rc1~166^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F9980%2Fhead;p=dealii.git

Improve error message in SymmetricTensor constructor.
---

diff --git a/include/deal.II/base/symmetric_tensor.h b/include/deal.II/base/symmetric_tensor.h
index 073c004f57..6fb2799a54 100644
--- a/include/deal.II/base/symmetric_tensor.h
+++ b/include/deal.II/base/symmetric_tensor.h
@@ -1068,7 +1068,8 @@ SymmetricTensor<rank_, dim, Number>::SymmetricTensor(
   static_assert(rank == 2, "This function is only implemented for rank==2");
   for (unsigned int d = 0; d < dim; ++d)
     for (unsigned int e = 0; e < d; ++e)
-      Assert(t[d][e] == t[e][d], ExcInternalError());
+      Assert(t[d][e] == t[e][d],
+             ExcMessage("The incoming Tensor must be exactly symmetric."));
 
   for (unsigned int d = 0; d < dim; ++d)
     data[d] = t[d][d];