--- /dev/null
+diff -Naur ParaView-5.6.0-bfaf7b82_SRC_orig/VTK/Rendering/OpenGL2/vtkStateStorage.h ParaView-5.6.0-bfaf7b82_SRC_modif/VTK/Rendering/OpenGL2/vtkStateStorage.h
+--- ParaView-5.6.0-bfaf7b82_SRC_orig/VTK/Rendering/OpenGL2/vtkStateStorage.h 2019-06-25 16:00:38.000000000 +0300
++++ ParaView-5.6.0-bfaf7b82_SRC_modif/VTK/Rendering/OpenGL2/vtkStateStorage.h 2019-07-12 11:32:00.000000000 +0300
+@@ -51,8 +51,11 @@
+
+ #include <algorithm>
+ #include <string>
++#include <vector>
+
+-#ifndef NDEBUG // a debug implementation
++// uncomment the folowing line to add in state debugging information
++//#define USE_STATE_DEBUGGING 1
++#ifdef USE_STATE_DEBUGGING
+
+ class VTKRENDERINGOPENGL2_EXPORT vtkStateStorage
+ {
+@@ -120,7 +123,7 @@
+ this->Storage.insert(this->Storage.end(), start, start + sizeof(T));
+ }
+
+-#else // release implementation
++#else // normal implementation
+
+ class VTKRENDERINGOPENGL2_EXPORT vtkStateStorage
+ {
+@@ -157,7 +160,7 @@
+ this->Storage.insert(this->Storage.end(), start, start + sizeof(T));
+ }
+
+-#endif // Release implementation
++#endif // normal implementation
+
+ #endif // vtkStateStorage_h
+