Fixed console commands not working due to null Worlds.

src/main/java/com/sk89q/worldedit/EditSession.java

@@ -104,14 +104,14 @@ public class EditSession implements Extent {
     protected final World world;
     private final ChangeSet changeSet = new BlockOptimizedHistory();
 
-    private final FastModeExtent fastModeExtent;
-    private final ChunkLoadingExtent chunkLoadingExtent;
-    private final LastAccessExtentCache cacheExtent;
-    private final BlockQuirkExtent quirkExtent;
-    private final DataValidatorExtent validator;
+    private @Nullable FastModeExtent fastModeExtent;
+    private @Nullable ChunkLoadingExtent chunkLoadingExtent;
+    private @Nullable LastAccessExtentCache cacheExtent;
+    private @Nullable BlockQuirkExtent quirkExtent;
+    private @Nullable DataValidatorExtent validator;
     private final BlockBagExtent blockBagExtent;
     private final MultiStageReorder reorderExtent;
-    private final ChangeSetExtent changeSetExtent;
+    private @Nullable ChangeSetExtent changeSetExtent;
     private final MaskingExtent maskingExtent;
     private final BlockChangeLimiter changeLimiter;
 
@@ -150,12 +150,12 @@ public class EditSession implements Extent {
      */
     EditSession(EventBus eventBus, World world, int maxBlocks, @Nullable BlockBag blockBag, EditSessionEvent event) {
         checkNotNull(eventBus);
-        checkNotNull(world);
         checkArgument(maxBlocks >= -1, "maxBlocks >= -1 required");
         checkNotNull(event);
 
         this.world = world;
 
+        if (world != null) {
             Extent extent;
 
             // This extents are ALWAYS used
@@ -180,6 +180,16 @@ public class EditSession implements Extent {
             this.bypassReorderHistory = blockBagExtent;
             this.bypassHistory = reorderExtent;
             this.bypassNone = extent;
+        } else {
+            Extent extent = new NullExtent();
+            extent = blockBagExtent = new BlockBagExtent(extent, blockBag);
+            extent = reorderExtent = new MultiStageReorder(extent, false);
+            extent = maskingExtent = new MaskingExtent(extent, Masks.alwaysTrue());
+            extent = changeLimiter = new BlockChangeLimiter(extent, maxBlocks);
+            this.bypassReorderHistory = extent;
+            this.bypassHistory = extent;
+            this.bypassNone = extent;
+        }
     }
 
     private Extent wrapExtent(Extent extent, EventBus eventBus, EditSessionEvent event, Stage stage) {
@@ -285,8 +295,10 @@ public class EditSession implements Extent {
      * @param enabled true to enable
      */
     public void setFastMode(boolean enabled) {
+        if (fastModeExtent != null) {
             fastModeExtent.setEnabled(enabled);
         }
+    }
 
     /**
      * Return fast mode status.
@@ -296,7 +308,7 @@ public class EditSession implements Extent {
      * @return true if enabled
      */
     public boolean hasFastMode() {
-        return fastModeExtent.isEnabled();
+        return fastModeExtent != null ? fastModeExtent.isEnabled() : false;
     }
 
     /**