Add missing assert in do_integrate_difference

Check number of components of exact_solution.

diff --git a/include/deal.II/numerics/vector_tools.templates.h b/include/deal.II/numerics/vector_tools.templates.h
index 6ac4f7d380a3b42e2761b636047c6bfb23e79d74..08954d19af2d64cb8d26bc6672cb0e5449fb7ad7 100644 (file)
--- a/include/deal.II/numerics/vector_tools.templates.h
+++ b/include/deal.II/numerics/vector_tools.templates.h
@@ -7245,7 +7245,10 @@ namespace VectorTools
       // on, if necessary, so have a read-write version of it:
       double exponent = exponent_1;
 
-      const unsigned int        n_components = dof.get_fe(0).n_components();
+      const unsigned int n_components = dof.get_fe(0).n_components();
+
+      Assert (exact_solution.n_components==n_components,
+              ExcDimensionMismatch(exact_solution.n_components, n_components));
 
       if (weight!=nullptr)
         {