Fix an exception type.

The documentation of the function states that we should use
ExcInterpolationNotImplemented.

diff --git a/source/fe/fe_system.cc b/source/fe/fe_system.cc
index 076464baa796f307cfae1f5998849d32620f0db2..ca306f75f2ede891bf2cc64763ba6f06e1b2852c 100644 (file)
--- a/source/fe/fe_system.cc
+++ b/source/fe/fe_system.cc
@@ -1958,7 +1958,9 @@ get_subface_interpolation_matrix (const FiniteElement<dim,spacedim> &x_source_fe
     }
   else
     {
-      Assert(fe_other_system != nullptr, ExcInternalError());
+      // we should have caught this at the start, but check again anyway
+      Assert(fe_other_system != nullptr, (typename FiniteElement<dim,spacedim>::
+                                          ExcInterpolationNotImplemented()));
     }
 }