Avoid use-after-scope when calling MappinQCache::initialize multiply

diff --git a/source/fe/mapping_q_cache.cc b/source/fe/mapping_q_cache.cc
index 8af4eb2b07b32dd635bdd829e0f79a27968ad1d1..96271efab4ab4181b88cd43cdf1c21ab01ca4506 100644 (file)
--- a/source/fe/mapping_q_cache.cc
+++ b/source/fe/mapping_q_cache.cc
@@ -94,6 +94,7 @@ MappingQCache<dim, spacedim>::initialize(
     const typename Triangulation<dim, spacedim>::cell_iterator &)>
     &compute_points_on_cell)
 {
+  clear_signal.disconnect();
   clear_signal = triangulation.signals.any_change.connect(
     [&]() -> void { this->support_point_cache.reset(); });