perform a cleanup of tables and iterators when chunk becomes impassable

changelog.txt

@@ -5,7 +5,8 @@ Date: 23. 11. 2021
     - RealSimplyData fixed missing map parameter in onUnitGroupCreated (Thanks illiander42 for reporting)
   Bugfixes:
     - Fixed chunkPassScanning not checking for enemy structures when determining passability
-    - Potential bugfix for evolutionTable being nil, still need a save to verify
+    - Fixed chunks that become impassable not being properly removed from all tables and iterators (Thanks ZwerOxotnik for reporting)
+    - Potential bugfix for evolutionTable being nil, still need a save to verify (Thanks ZwerOxotnik for reporting)
     - Corrected Krastorio2 position parameter wanting xy pair. (Krastorio2 1.1.6 that is currently published at the time of this update is broken still, see thread https://mods.factorio.com/mod/Rampant/discussion/5f44980455e55634147d01f4)
 
 ---------------------------------------------------------------------------------------------------

libs/ChunkProcessor.lua

@@ -7,11 +7,13 @@ local chunkProcessor = {}
 
 local chunkUtils = require("ChunkUtils")
 local queryUtils = require("QueryUtils")
+local mapUtils = require("MapUtils")
 
 -- constants
 
 -- imported functions
 
+local removeChunkFromMap = mapUtils.removeChunkFromMap
 local setPositionInQuery = queryUtils.setPositionInQuery
 local registerEnemyBaseStructure = chunkUtils.registerEnemyBaseStructure
 local unregisterEnemyBaseStructure = chunkUtils.unregisterEnemyBaseStructure
@@ -102,8 +104,7 @@ function chunkProcessor.processPendingChunks(universe, tick, flush)
                 local chunk = initialScan(oldChunk, map, tick)
                 if (chunk == -1) then
                     removeProcessQueueChunk(map.processQueue, oldChunk)
-                    universe.chunkIdToChunk[oldChunk.id] = nil
-                    map[x][y] = nil
+                    removeChunkFromMap(map, x, y, oldChunk.id)
                 end
             else
                 local initialChunk = createChunk(map, x, y)
@@ -117,8 +118,8 @@ function chunkProcessor.processPendingChunks(universe, tick, flush)
                         chunk
                     )
                 else
-                    universe.chunkIdToChunk[initialChunk.id] = nil
                     map[x][y] = nil
+                    universe.chunkIdToChunk[initialChunk.id] = nil
                 end
             end
 
@@ -195,8 +196,7 @@ function chunkProcessor.processScanChunks(universe)
 
         if (chunkPassScan(chunk, map) == -1) then
             removeProcessQueueChunk(map.processQueue, chunk)
-            map[chunk.x][chunk.y] = nil
-            map.universe.chunkIdToChunk[chunk.id] = nil
+            removeChunkFromMap(map, chunk.x, chunk.y, chunk.id)
         end
     end
 end

libs/MapProcessor.lua

@@ -426,17 +426,17 @@ function mapProcessor.processVengence(universe)
         end
     else
         universe.deployVengenceIterator = next(vengenceQueue, chunkId)
+        vengenceQueue[chunkId] = nil
         local map = vengencePack.map
         if not map.surface.valid then
-            vengenceQueue[chunkId] = nil
             return
         end
+        local chunk = getChunkById(vengencePack.map, chunkId)
         if universe.enabledMigration and (universe.random() < 0.075) then
-            formVengenceSettler(map, getChunkById(vengencePack.map, chunkId))
+            formVengenceSettler(map, chunk)
         else
-            formVengenceSquad(map, getChunkById(vengencePack.map, chunkId))
+            formVengenceSquad(map, chunk)
         end
-        vengenceQueue[chunkId] = nil
     end
 end
 

libs/MapUtils.lua

@@ -76,6 +76,73 @@ function mapUtils.nextMap(universe)
     until mapIterator == universe.mapIterator
 end
 
+function mapUtils.removeChunkFromMap(map, x, y, chunkId)
+    local universe = map.universe
+    map[x][y] = nil
+    universe.chunkIdToChunk[chunkId] = nil
+    universe.chunkToActiveNest[chunkId] = nil
+    universe.chunkToActiveRaidNest[chunkId] = nil
+    universe.chunkToDrained[chunkId] = nil
+    universe.chunkToRetreats[chunkId] = nil
+    universe.chunkToRallys[chunkId] = nil
+    universe.chunkToPassScan[chunkId] = nil
+    universe.chunkToNests[chunkId] = nil
+    universe.vengenceQueue[chunkId] = nil
+    universe.processActiveNest[chunkId] = nil
+    universe.chunkToVictory[chunkId] = nil
+    map.chunkToBase[chunkId] = nil
+    map.chunkToTurrets[chunkId] = nil
+    map.chunkToTraps[chunkId] = nil
+    map.chunkToUtilities[chunkId] = nil
+    map.chunkToHives[chunkId] = nil
+    map.chunkToNestIds[chunkId] = nil
+    map.chunkToHiveIds[chunkId] = nil
+    map.chunkToTrapIds[chunkId] = nil
+    map.chunkToTurretIds[chunkId] = nil
+    map.chunkToUtilityIds[chunkId] = nil
+    map.chunkToPlayerBase[chunkId] = nil
+    map.chunkToResource[chunkId] = nil
+    map.chunkToPlayerCount[chunkId] = nil
+    map.chunkToSquad[chunkId] = nil
+    map.chunkToPassable[chunkId] = nil
+    map.chunkToPathRating[chunkId] = nil
+    map.chunkToDeathGenerator[chunkId] = nil
+
+    if universe.processActiveNestIterator == chunkId then
+        universe.processActiveNestIterator = nil
+    end
+    if universe.victoryScentIterator == chunkId then
+        universe.victoryScentIterator = nil
+    end
+    if universe.processNestIterator == chunkId then
+        universe.processNestIterator = nil
+    end
+    if universe.chunkToDrainedIterator == chunkId then
+        universe.chunkToDrainedIterator = nil
+    end
+    if universe.chunkToRetreatIterator == chunkId then
+        universe.chunkToRetreatIterator = nil
+    end
+    if universe.chunkToRallyIterator == chunkId then
+        universe.chunkToRallyIterator = nil
+    end
+    if universe.chunkToPassScanIterator == chunkId then
+        universe.chunkToPassScanIterator = nil
+    end
+    if universe.processActiveSpawnerIterator == chunkId then
+        universe.processActiveSpawnerIterator = nil
+    end
+    if universe.processActiveRaidSpawnerIterator == chunkId then
+        universe.processActiveRaidSpawnerIterator = nil
+    end
+    if universe.processMigrationIterator == chunkId then
+        universe.processMigrationIterator = nil
+    end
+    if universe.deployVengenceIterator == chunkId then
+        universe.deployVengenceIterator = nil
+    end
+end
+
 --[[
     1 2 3
     \|/