Fix a mistaken assertion that only succeeds by accident.

Specifically, it succeeds because we get a pointer to the first of a block of
elements where the size of the block is greater than one. If one had a 1-point
quadrature formula, the assertion would fail.

diff --git a/examples/step-18/step-18.cc b/examples/step-18/step-18.cc
index 5796801b572fe8a59baa517e3878ae1e077d4a84..035991a0208a196547dff77cc5199a7976326a18 100644 (file)
--- a/examples/step-18/step-18.cc
+++ b/examples/step-18/step-18.cc
@@ -1742,7 +1742,7 @@ namespace Step18
           Assert(local_quadrature_points_history >=
                    &quadrature_point_history.front(),
                  ExcInternalError());
-          Assert(local_quadrature_points_history <
+          Assert(local_quadrature_points_history <=
                    &quadrature_point_history.back(),
                  ExcInternalError());