Fixed crash when Destructor tries to break secured network block

CHANGELOG.md

@@ -8,6 +8,7 @@
 - Fixed "Clear" and "Create Pattern" buttons not working correctly when using Grid Filter tabs (raoulvdberge)
 - Fixed Wrench in Dismantling Mode voiding Storage Block contents (raoulvdberge)
 - Fixed OPs not having global permissions on secured storage systems (raoulvdberge)
+- Fixed crash when Destructor tries to break secured network block (raoulvdberge)
 
 ### 1.4
 - Added Security Manager (raoulvdberge)

src/main/java/com/raoulvdberge/refinedstorage/RSUtils.java

@@ -327,6 +327,13 @@ public final class RSUtils {
     }
 
     public static void sendNoPermissionMessage(EntityPlayer player) {
+        // When a fake player isn't allowed to do something, we can't send a no permission message because there is no connection associated to the fake player.
+        // For example when a Destructor is attempting to break a network block on a secured network with the fake player.
+        // So, we first check if there is a connection.
+        if (player instanceof EntityPlayerMP && ((EntityPlayerMP) player).connection == null) {
+            return;
+        }
+
         player.sendMessage(new TextComponentTranslation("misc.refinedstorage:security.no_permission").setStyle(new Style().setColor(TextFormatting.RED)));
     }