diff --git a/GeoModelCore/GeoModelKernel/GeoModelKernel/GeoLogVol.h b/GeoModelCore/GeoModelKernel/GeoModelKernel/GeoLogVol.h index 2a214623383bdeee5d3e6a98235724f14f5fa42a..af7175eaf488eb47091368b6018ed55b714cc51e 100644 --- a/GeoModelCore/GeoModelKernel/GeoModelKernel/GeoLogVol.h +++ b/GeoModelCore/GeoModelKernel/GeoModelKernel/GeoLogVol.h @@ -35,6 +35,7 @@ class GeoLogVol : public RCBase // Returns the material of the logical volume. const GeoMaterial* getMaterial () const { + std::shared_lock lock{m_mutex}; return m_material; }