Program: 174567
Project: 174567
Buggy source:
public void readEntityFromNBT(NBTTagCompound compound){
  super.readEntityFromNBT(compound);
  if (compound.hasKey("String_Node_Str")) {
    this.setGemCut(compound.getInteger("String_Node_Str"));
    this.setGemPlacement(compound.getInteger("String_Node_Str"));
  }
 else {
    this.convertGems(compound.getInteger("String_Node_Str"));
  }
  if (!this.isGemPlacementDefined() || !this.isCorrectGemPlacement()) {
    int placementIndex=this.rand.nextInt(this.placements.size());
    this.setGemPlacement(this.placements.get(placementIndex).id);
  }
  if (!this.isGemCutDefined() || !this.isCorrectGemCut()) {
    int cutIndex=this.rand.nextInt(this.cuts.size());
    this.setGemCut(this.cuts.get(cutIndex).id);
  }
  this.applyGemPlacementBuffs();
  this.setHasVisor(compound.getBoolean("String_Node_Str"));
  if (compound.hasKey("String_Node_Str")) {
    this.setInsigniaColor(compound.getInteger("String_Node_Str"));
  }
 else {
    this.setInsigniaColor(12);
  }
  this.setHairStyle(compound.getInteger("String_Node_Str"));
  this.setDefective(compound.getBoolean("String_Node_Str"));
  this.setPrimary(compound.getBoolean("String_Node_Str"));
  NBTTagList fusionMembers=compound.getTagList("String_Node_Str",10);
  for (int i=0; i < fusionMembers.tagCount(); ++i) {
    this.fusionMembers.add(fusionMembers.getCompoundTagAt(i));
  }
  this.setFusionCount(compound.getInteger("String_Node_Str"));
  this.setFusionPlacements(compound.getString("String_Node_Str"));
  this.setSpecial(compound.getInteger("String_Node_Str"));
  String ownerId;
  if (compound.hasKey("String_Node_Str",8)) {
    ownerId=compound.getString("String_Node_Str");
  }
 else {
    String tempId=compound.getString("String_Node_Str");
    ownerId=PreYggdrasilConverter.convertMobOwnerIfNeeded(this.getServer(),tempId);
  }
  if (!ownerId.isEmpty()) {
    this.setOwnerId(UUID.fromString(ownerId));
  }
  String leaderId;
  if (compound.hasKey("String_Node_Str",8)) {
    leaderId=compound.getString("String_Node_Str");
  }
 else {
    String tempId=compound.getString("String_Node_Str");
    leaderId=PreYggdrasilConverter.convertMobOwnerIfNeeded(this.getServer(),tempId);
  }
  if (!leaderId.isEmpty()) {
    this.setLeader(UUID.fromString(leaderId));
  }
  NBTTagList owners=compound.getTagList("String_Node_Str",10);
  for (int i=0; i < owners.tagCount(); ++i) {
    NBTTagCompound nbt=owners.getCompoundTagAt(i);
    String jointId;
    if (nbt.hasKey("String_Node_Str",8)) {
      jointId=nbt.getString("String_Node_Str");
    }
 else {
      String tempId=nbt.getString("String_Node_Str");
      jointId=PreYggdrasilConverter.convertMobOwnerIfNeeded(this.getServer(),tempId);
    }
    if (!jointId.isEmpty()) {
      this.jointOwners.add(UUID.fromString(jointId));
    }
  }
  if (compound.hasKey("String_Node_Str") && compound.hasKey("String_Node_Str") && compound.hasKey("String_Node_Str")) {
    this.restPosition=new BlockPos(compound.getDouble("String_Node_Str"),compound.getDouble("String_Node_Str"),compound.getDouble("String_Node_Str"));
  }
  if (this.stayAI != null) {
    this.stayAI.setSitting(compound.getBoolean("String_Node_Str"));
  }
  this.isSitting=compound.getBoolean("String_Node_Str");
  this.servitude=compound.getInteger("String_Node_Str");
  this.fallbackServitude=compound.getInteger("String_Node_Str");
  this.timeUntilBetrayal=compound.getInteger("String_Node_Str");
  this.wantsToFuse=compound.getBoolean("String_Node_Str");
  if (compound.hasKey("String_Node_Str")) {
    this.pitch=compound.getFloat("String_Node_Str");
  }
 else {
    this.pitch=0.7F + (this.rand.nextFloat() / 2);
  }
  if (compound.hasKey("String_Node_Str")) {
    this.setDimensionOfCreation(compound.getInteger("String_Node_Str"));
  }
 else {
    this.setDimensionOfCreation(this.dimension);
  }
  this.setAttackAI();
}

Fixed version (ground truth):
public void readEntityFromNBT(NBTTagCompound compound){
  super.readEntityFromNBT(compound);
  if (compound.hasKey("String_Node_Str")) {
    this.setGemCut(compound.getInteger("String_Node_Str"));
    this.setGemPlacement(compound.getInteger("String_Node_Str"));
  }
 else {
    this.convertGems(compound.getInteger("String_Node_Str"));
  }
  if (!this.isGemPlacementDefined() || !this.isGemCutDefined() || !this.isCorrectCutPlacement()) {
    this.setNewCutPlacement();
  }
  this.applyGemPlacementBuffs();
  this.setHasVisor(compound.getBoolean("String_Node_Str"));
  if (compound.hasKey("String_Node_Str")) {
    this.setInsigniaColor(compound.getInteger("String_Node_Str"));
  }
 else {
    this.setInsigniaColor(12);
  }
  this.setHairStyle(compound.getInteger("String_Node_Str"));
  this.setDefective(compound.getBoolean("String_Node_Str"));
  this.setPrimary(compound.getBoolean("String_Node_Str"));
  NBTTagList fusionMembers=compound.getTagList("String_Node_Str",10);
  for (int i=0; i < fusionMembers.tagCount(); ++i) {
    this.fusionMembers.add(fusionMembers.getCompoundTagAt(i));
  }
  this.setFusionCount(compound.getInteger("String_Node_Str"));
  this.setFusionPlacements(compound.getString("String_Node_Str"));
  this.setSpecial(compound.getInteger("String_Node_Str"));
  String ownerId;
  if (compound.hasKey("String_Node_Str",8)) {
    ownerId=compound.getString("String_Node_Str");
  }
 else {
    String tempId=compound.getString("String_Node_Str");
    ownerId=PreYggdrasilConverter.convertMobOwnerIfNeeded(this.getServer(),tempId);
  }
  if (!ownerId.isEmpty()) {
    this.setOwnerId(UUID.fromString(ownerId));
  }
  String leaderId;
  if (compound.hasKey("String_Node_Str",8)) {
    leaderId=compound.getString("String_Node_Str");
  }
 else {
    String tempId=compound.getString("String_Node_Str");
    leaderId=PreYggdrasilConverter.convertMobOwnerIfNeeded(this.getServer(),tempId);
  }
  if (!leaderId.isEmpty()) {
    this.setLeader(UUID.fromString(leaderId));
  }
  NBTTagList owners=compound.getTagList("String_Node_Str",10);
  for (int i=0; i < owners.tagCount(); ++i) {
    NBTTagCompound nbt=owners.getCompoundTagAt(i);
    String jointId;
    if (nbt.hasKey("String_Node_Str",8)) {
      jointId=nbt.getString("String_Node_Str");
    }
 else {
      String tempId=nbt.getString("String_Node_Str");
      jointId=PreYggdrasilConverter.convertMobOwnerIfNeeded(this.getServer(),tempId);
    }
    if (!jointId.isEmpty()) {
      this.jointOwners.add(UUID.fromString(jointId));
    }
  }
  if (compound.hasKey("String_Node_Str") && compound.hasKey("String_Node_Str") && compound.hasKey("String_Node_Str")) {
    this.restPosition=new BlockPos(compound.getDouble("String_Node_Str"),compound.getDouble("String_Node_Str"),compound.getDouble("String_Node_Str"));
  }
  if (this.stayAI != null) {
    this.stayAI.setSitting(compound.getBoolean("String_Node_Str"));
  }
  this.isSitting=compound.getBoolean("String_Node_Str");
  this.servitude=compound.getInteger("String_Node_Str");
  this.fallbackServitude=compound.getInteger("String_Node_Str");
  this.timeUntilBetrayal=compound.getInteger("String_Node_Str");
  this.wantsToFuse=compound.getBoolean("String_Node_Str");
  if (compound.hasKey("String_Node_Str")) {
    this.pitch=compound.getFloat("String_Node_Str");
  }
 else {
    this.pitch=0.7F + (this.rand.nextFloat() / 2);
  }
  if (compound.hasKey("String_Node_Str")) {
    this.setDimensionOfCreation(compound.getInteger("String_Node_Str"));
  }
 else {
    this.setDimensionOfCreation(this.dimension);
  }
  this.setAttackAI();
}