Revert "Drop a patch - moonrise includes it"

This reverts commit 4d16ae0.

patches/server/0021-Make-EntityCollisionContext-a-live-representation.patch

@@ -0,0 +1,105 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Paul Sauve <[email protected]>
+Date: Sun, 9 May 2021 18:35:05 -0500
+Subject: [PATCH] Make EntityCollisionContext a live representation
+
+While Context is in the name, it is not used as a context. Instead it is
+always created, use temporarily, then thrown away. This means having a
+lot of fields to initialize and make space for is useless. I cannot find
+anywhere in the codebase where this is used as a context which may be
+saved for later, so this should be safe assuming plugins don't use it
+for some strange reason.
+
+diff --git a/src/main/java/net/minecraft/world/phys/shapes/EntityCollisionContext.java b/src/main/java/net/minecraft/world/phys/shapes/EntityCollisionContext.java
+index 88a4a72bb390947dc17e5da09a99b2d1b3ac4621..284c76ddb9724b44bb2e93f590685c728e843e6d 100644
+--- a/src/main/java/net/minecraft/world/phys/shapes/EntityCollisionContext.java
++++ b/src/main/java/net/minecraft/world/phys/shapes/EntityCollisionContext.java
+@@ -17,50 +17,69 @@ public class EntityCollisionContext implements CollisionContext {
+             return defaultValue;
+         }
+     };
+-    private final boolean descending;
+-    private final double entityBottom;
+-    private final ItemStack heldItem;
+-    private final Predicate<FluidState> canStandOnFluid;
++    // Pufferfish start - remove these and pray no plugin uses them
++    // private final boolean descending;
++    // private final double entityBottom;
++    // private final ItemStack heldItem;
++    // private final Predicate<FluidState> canStandOnFluid;
++    // Pufferfish end
+     @Nullable
+     private final Entity entity;
+
+     protected EntityCollisionContext(boolean descending, double minY, ItemStack heldItem, Predicate<FluidState> walkOnFluidPredicate, @Nullable Entity entity) {
+-        this.descending = descending;
+-        this.entityBottom = minY;
+-        this.heldItem = heldItem;
+-        this.canStandOnFluid = walkOnFluidPredicate;
++        // Pufferfish start - remove these
++        // this.descending = descending;
++        // this.entityBottom = minY;
++        // this.heldItem = heldItem;
++        // this.canStandOnFluid = walkOnFluidPredicate;
++        // Pufferfish end
+         this.entity = entity;
+     }
+
+     @Deprecated
+     protected EntityCollisionContext(Entity entity) {
+-        this(
+-            entity.isDescending(),
+-            entity.getY(),
+-            entity instanceof LivingEntity ? ((LivingEntity)entity).getMainHandItem() : ItemStack.EMPTY,
+-            entity instanceof LivingEntity ? ((LivingEntity)entity)::canStandOnFluid : fluidState -> false,
+-            entity
+-        );
++        // Pufferfish start - remove this
++        // this(
++        //     entity.isDescending(),
++        //     entity.getY(),
++        //     entity instanceof LivingEntity ? ((LivingEntity)entity).getMainHandItem() : ItemStack.EMPTY,
++        //     entity instanceof LivingEntity ? ((LivingEntity)entity)::canStandOnFluid : fluidState -> false,
++        //     entity
++        // );
++        // Pufferfish end
++        this.entity = entity;
+     }
+
+     @Override
+     public boolean isHoldingItem(Item item) {
+-        return this.heldItem.is(item);
++        // Pufferfish start
++        Entity entity = this.entity;
++        if (entity instanceof LivingEntity livingEntity) {
++            return livingEntity.getMainHandItem().is(item);
++        }
++        return ItemStack.EMPTY.is(item);
++        // Pufferfish end
+     }
+
+     @Override
+     public boolean canStandOnFluid(FluidState stateAbove, FluidState state) {
+-        return this.canStandOnFluid.test(state) && !stateAbove.getType().isSame(state.getType());
++        // Pufferfish start
++        Entity entity = this.entity;
++        if (entity instanceof LivingEntity livingEntity) {
++            return livingEntity.canStandOnFluid(state) && !stateAbove.getType().isSame(state.getType());
++        }
++        return false;
++        // Pufferfish end
+     }
+
+     @Override
+     public boolean isDescending() {
+-        return this.descending;
++        return this.entity != null && this.entity.isDescending(); // Pufferfish
+     }
+
+     @Override
+     public boolean isAbove(VoxelShape shape, BlockPos pos, boolean defaultValue) {
+-        return this.entityBottom > (double)pos.getY() + shape.max(Direction.Axis.Y) - 1.0E-5F;
++        return (this.entity == null ? -Double.MAX_VALUE : entity.getY()) > (double)pos.getY() + shape.max(Direction.Axis.Y) - 1.0E-5F; // Pufferfish
+     }
+
+     @Nullable