Skip poi folders for snapshot restores.

New to 1.14, Mojang stores .mca files which don't contain chunks in the
poi folder.

Note: we explicitly filter *out* the poi folder, instead of filtering
*to* the regions folder, since old versions of minecraft had regions
directly in the world folder (instead of a regions subfolder).

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

@@ -1307,14 +1307,16 @@ public class EditSession implements Extent, AutoCloseable {
         checkNotNull(origin);
         checkArgument(radius >= 0, "radius >= 0 required");
 
+        Mask waterloggedMask = null;
+        if (waterlogged) {
+            Map<String, String> stateMap = new HashMap<>();
+            stateMap.put("waterlogged", "true");
+            waterloggedMask = new BlockStateMask(this, stateMap, true);
+        }
         MaskIntersection mask = new MaskIntersection(
                 new BoundedHeightMask(0, getWorld().getMaxY()),
                 new RegionMask(new EllipsoidRegion(null, origin, Vector3.at(radius, radius, radius))),
-                waterlogged ? new MaskUnion(
-                                getWorld().createLiquidMask(),
-                                new BlockStateMask(this, new HashMap<String, String>() {{
-                                    put("waterlogged", "true");
-                                }}, true))
+                waterlogged ? new MaskUnion(getWorld().createLiquidMask(), waterloggedMask)
                             : getWorld().createLiquidMask());
 
         BlockReplace replace;

worldedit-core/src/main/java/com/sk89q/worldedit/command/SnapshotUtilCommands.java

@@ -133,7 +133,9 @@ public class SnapshotUtilCommands {
 
             if (restore.hadTotalFailure()) {
                 String error = restore.getLastErrorMessage();
-                if (error != null) {
+                if (!restore.getMissingChunks().isEmpty()) {
+                    player.printError("Chunks were not present in snapshot.");
+                } else if (error != null) {
                     player.printError("Errors prevented any blocks from being restored.");
                     player.printError("Last error: " + error);
                 } else {

worldedit-core/src/main/java/com/sk89q/worldedit/world/storage/TrueZipMcRegionChunkStore.java

@@ -101,6 +101,7 @@ public class TrueZipMcRegionChunkStore extends McRegionChunkStore {
                     // Check for file
                     if (pattern.matcher(testEntry.getName()).matches()) {
                         folder = testEntry.getName().substring(0, testEntry.getName().lastIndexOf('/'));
+                        if (folder.endsWith("poi")) continue;
                         name = folder + "/" + name;
                         break;
                     }

worldedit-core/src/main/java/com/sk89q/worldedit/world/storage/ZippedMcRegionChunkStore.java

@@ -87,6 +87,7 @@ public class ZippedMcRegionChunkStore extends McRegionChunkStore {
                 if (testEntry.getName().startsWith(worldName + "/")) {
                     if (pattern.matcher(testEntry.getName()).matches()) { // does entry end in .mca
                         folder = testEntry.getName().substring(0, testEntry.getName().lastIndexOf('/'));
+                        if (folder.endsWith("poi")) continue;
                         name = folder + "/" + name;
                         break;
                     }