Fix #6259 error spam and deployment hang with combined arms forces

megamek/src/megamek/client/bot/BotClient.java

@@ -140,9 +140,12 @@ public void gameTurnChange(GameTurnChangeEvent e) {
             public void gamePhaseChange(GamePhaseChangeEvent e) {
                 calculatedTurnThisPhase = false;
                 if (e.getOldPhase().isSimultaneous(getGame())) {
-                    logger.info("%s: Calculated %d / %d turns for phase %s",
+                    logger.info(
+                        String.format("%s: Calculated %d / %d turns for phase %s",
                             getName(), calculatedTurnsThisPhase,
-                            getGame().getEntitiesOwnedBy(getLocalPlayer()), e.getOldPhase());
+                            getGame().getEntitiesOwnedBy(getLocalPlayer()), e.getOldPhase()
+                        )
+                    );
                 }
                 calculatedTurnsThisPhase = 0;
             }
@@ -654,7 +657,6 @@ public double getMassOfAllInBuilding(final Game game, final Coords coords) {
             return dest;
         }
 
-        logger.error("Returning no deployment position; THIS IS BAD!");
         // If NONE of them are acceptable, then just return null.
         return null;
     }

megamek/src/megamek/client/bot/princess/Princess.java

@@ -803,7 +803,11 @@ protected Coords rankDeploymentCoords(Entity deployedUnit, List<Coords> possible
             logger.debug(sb.toString());
         }
         // Fall back on old method
-        return super.getFirstValidCoords(deployedUnit, possibleDeployCoords);
+        Coords bestCandidate = super.getFirstValidCoords(deployedUnit, possibleDeployCoords);
+        if (bestCandidate == null) {
+            logger.error("Returning no deployment position; THIS IS BAD!");
+        }
+        return bestCandidate;
     }
 
     @Override

megamek/src/megamek/common/EquipmentType.java

@@ -546,9 +546,11 @@ public boolean hasModeType(String modeType) {
         }
 
         // Avoid Concurrent Modification exception with this one simple trick!
-        for (Iterator<EquipmentMode> iterator = modes.iterator(); iterator.hasNext();) {
-            if (iterator.next().getName().equals(modeType)) {
-                return true;
+        synchronized (modes) {
+            for (Iterator<EquipmentMode> iterator = modes.iterator(); iterator.hasNext(); ) {
+                if (iterator.next().getName().equals(modeType)) {
+                    return true;
+                }
             }
         }
 

megamek/src/megamek/common/Game.java

@@ -1475,6 +1475,9 @@ public synchronized List<Entity> getEntitiesVector(Coords c, boolean ignore) {
         if (entityPosLookup.isEmpty() && !inGameTWEntities().isEmpty()) {
             resetEntityPositionLookup();
         }
+        // For sanity check
+        GamePhase phase = getPhase();
+
         Set<Integer> posEntities = entityPosLookup.get(c);
         List<Entity> vector = new ArrayList<>();
         if (posEntities != null) {
@@ -1492,9 +1495,9 @@ public synchronized List<Entity> getEntitiesVector(Coords c, boolean ignore) {
                 if (e.isTargetable() || ignore) {
                     vector.add(e);
 
-                    // Sanity check
+                    // Sanity check: report out-of-place entities if it's not the deployment phase
                     HashSet<Coords> positions = e.getOccupiedCoords();
-                    if (!positions.contains(c)) {
+                    if (!phase.isDeployment() && !positions.contains(c)) {
                         logger.error(e.getDisplayName() + " is not in " + c + "!");
                     }
                 }

megamek/src/megamek/common/weapons/lasers/LaserWeapon.java

@@ -72,7 +72,9 @@ public int getModesCount(Mounted<?> mounted) {
         }
 
         //Only works if laser pulse module's "Pulse" modes are added last.
-        return (int) modes.stream().filter(mode -> !mode.getName().startsWith("Pulse")).count();
+        synchronized (modes) {
+            return (int) modes.stream().filter(mode -> !mode.getName().startsWith("Pulse")).count();
+        }
     }
 
     @Override