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  1. Minecraft: Java Edition
  2. MC-113935

onInitialSpawn modifies world even if mob was not spawned

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    • Confirmed
    • (Unassigned)

      The bug

      The method net.minecraft.entity.EntityLiving.onInitialSpawn(DifficultyInstance, IEntityLivingData) (respectively methods overriding it) modify the world even if the mob the method was called for was not spawned.

      How to reproduce

      This can currently be seen with MC-103516. The additional mob is spawned but the mob the method was called for is not spawned.

      Affected classes

      Based on 1.11.2 decompiled using MCP 9.35 rc1

      Class Description
      EntitySpider Spawns skeleton 1
      EntityZombie Spawns chicken or sets IsChickenJockey of existing chicken to true 1
      EntityOcelot Spawns other ocelots

      1 Currently blocked by MC-111747 which describes that position and bounding box are not instantly updated when an entity starts riding another entity

            Unassigned Unassigned
            marcono1234 [Mod] Marcono1234
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              Created:
              Updated:
              Resolved:
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