don't jump on air anymore

src/main/java/baritone/bot/pathing/movement/MovementHelper.java

@@ -121,6 +121,9 @@ public interface MovementHelper extends ActionCosts, Helper {
         if (block instanceof BlockLadder || block instanceof BlockVine) {
             return true;
         }
+        if (block instanceof BlockAir) {
+            return false;
+        }
         if (isWater(block)) {
             return isWater(pos.up()); // You can only walk on water if there is water above it
         }

src/main/java/baritone/bot/pathing/movement/movements/MovementAscend.java

@@ -49,6 +49,9 @@ public class MovementAscend extends Movement {
             if (!MovementHelper.isAir(positionsToPlace[0]) && !MovementHelper.isWater(positionsToPlace[0])) {
                 return COST_INF;
             }
+            if (true) {
+                return COST_INF;
+            }
             for (BlockPos against1 : against) {
                 if (BlockStateInterface.get(against1).isBlockNormalCube()) {
                     return JUMP_ONE_BLOCK_COST + WALK_ONE_BLOCK_COST + PLACE_ONE_BLOCK_COST + getTotalHardnessOfBlocksToBreak(ts);