Fixes

-Assert if callEntitiesFunction is called for system which is not alive
-cleanup and formatting

dub.json

@@ -63,7 +63,7 @@
 			],
 			"dflags": [
 				"-unittest",
-				"-cov"
+				"-cov=ctfe"
 			]
 		},
 		{

source/bubel/ecs/manager.d

@@ -73,7 +73,6 @@ export struct EntityManager
     {
         if (gEntityManager is null)
         {
-            //gEntityManager = Mallocator.make!EntityManager(threads_count);
             gEntityManager = Mallocator.make!EntityManager(threads_count, page_size, block_pages_count);
 
             with (gEntityManager)
@@ -334,17 +333,19 @@ export struct EntityManager
         allocator.freeMemory();
     }
 
-
     /************************************************************************************************************************
     Unregister given system form EntityManager.
     */
     void unregisterSystem(Sys)()
     {
         assert(register_state, "unregisterSystem must be called between beginRegister() and endRegister().");
+
         ushort system_id = becsID!Sys;
         System* system = getSystem(system_id);
+
         assert(system, "System was not registered");
         assert(system.isAlive, "System already unregistered");
+
         system.destroy();
         *system = System.init;
     }
@@ -923,8 +924,7 @@ export struct EntityManager
                 __traits(getMember, input_data, comp_info.name) = (
                     cast(typeof(
                         (typeof(__traits(getMember, Sys.EntitiesData, comp_info.name))).init[0]
-                    )*)
+                    )*)(cast(void*) block + info.deltas[system.m_components[iii]])
-                    (cast(void*) block + info.deltas[system.m_components[iii]])
                 )[offset .. entities_count];
             }
 
@@ -1177,8 +1177,10 @@ export struct EntityManager
         system.m_priority = priority;
         //(cast(Sys*) system.m_system_pointer).__ecsInitialize();
         //system.jobs =  (cast(Sys*) system.m_system_pointer)._ecs_jobs;
-        static if(__traits(hasMember, Sys ,"__becs_jobs_count"))system.jobs = Mallocator.makeArray!(Job)(Sys.__becs_jobs_count);
+        static if (__traits(hasMember, Sys, "__becs_jobs_count"))
-        else system.jobs = Mallocator.makeArray!(Job)(32);
+            system.jobs = Mallocator.makeArray!(Job)(Sys.__becs_jobs_count);
+        else
+            system.jobs = Mallocator.makeArray!(Job)(32);
 
         static if (OnUpdateOverloadNum != -1)
         {
@@ -1404,6 +1406,8 @@ export struct EntityManager
         System* system = getSystem(becsID!Sys);
         assert(system != null,
             "System must be registered in EntityManager before any funcion can be called.");
+        assert(system.isAlive(), "System must be alive (registered) in order to call entities function on its entities");
+
         if (!system.m_any_system_caller)
             return;
 
@@ -1922,8 +1926,7 @@ export struct EntityManager
                 addSystemCaller(*info, cast(uint) i);
             }
 
-            info.comp_add_info = Mallocator.makeArray!(EntityInfo*)(gEntityManager.components.length);
+            info.comp_add_info = Mallocator.makeArray!(EntityInfo*)(info.deltas.length);
-            //info.comp_rem_info = Mallocator.makeArray!(EntityInfo*)(gEntityManager.components.length);
             info.comp_rem_info = Mallocator.makeArray!(EntityInfo*)(info.deltas.length);
 
             foreach (comp; info.components)
@@ -2082,7 +2085,9 @@ export struct EntityManager
         }
 
         ///call Custom Entity Filter test if function exists
-        if(system.m_filter_entity && !(cast(bool function(void* system_pointer, EntityInfo* info) @nogc nothrow)system.m_filter_entity)(system, &entity))return;
+        if (system.m_filter_entity && !(cast(bool function(void* system_pointer, EntityInfo* info) @nogc nothrow) system
+                .m_filter_entity)(system, &entity))
+            return;
 
         entity.systems[system_id] = true;
     }
@@ -2127,7 +2132,8 @@ export struct EntityManager
         System* system = &systems[system_id];
 
         connectListenerToEntityInfo(info, system_id);
-        if(!info.systems[system_id])return;
+        if (!info.systems[system_id])
+            return;
 
         uint index = 0;
         for (; index < passes[system.m_pass].system_callers.length; index++)
@@ -3135,9 +3141,8 @@ export struct EntityManager
         foreach (ref system; systems)
         {
             if (system.isAlive() == false)
-            {
                 continue;
-            }
+
             if (system.enabled && system.m_end)
                 (cast(void function(void*)) system.m_end)(system.m_system_pointer);
         }
@@ -3491,7 +3496,8 @@ export struct EntityManager
 
         export bool hasComponent(ushort component_id)
         {
-            if(component_id >= deltas.length || !deltas[component_id])return false;
+            if (component_id >= deltas.length || !deltas[component_id])
+                return false;
             return true;
         }
 
@@ -3643,7 +3649,6 @@ export struct EntityManager
 
         export void execute() nothrow @nogc
         {
-            //gEntityManager.getThreadID();
             foreach (ref caller; callers)
             {
                 caller.thread_id = gEntityManager.threadID();