oops, i did it again

h2/src/main/org/h2/mvstore/MVMap.java

@@ -1516,7 +1516,6 @@ public class MVMap<K, V> extends AbstractMap<K, V>
             }
             oldRootReference = rootReference;
             ++attempt;
-Thread.yield();
             CursorPos pos = traverseDown(rootReference.root, key);
             Page p = pos.page;
             int index = pos.index;

h2/src/main/org/h2/mvstore/MVStore.java

@@ -1420,7 +1420,9 @@ public final class MVStore {
         }
 
         public void visit(long pos) {
-            assert DataUtils.isPageSaved(pos);
+            if (!DataUtils.isPageSaved(pos)) {
+                return;
+            }
             register(DataUtils.getPageChunkId(pos));
             if (DataUtils.getPageType(pos) != DataUtils.PAGE_TYPE_LEAF) {
                 int chunkIds[];