Program: 62124
Project: 62124
Buggy source:
public boolean compareSame(FullMultinameTreeItem other){
  if (multinameIndex != other.multinameIndex) {
    return false;
  }
  GraphTargetItem tiName=name;
  if (name != null) {
    name=name.getThroughDuplicate();
  }
  while (tiName instanceof LocalRegTreeItem) {
    if (((LocalRegTreeItem)tiName).computedValue != null) {
      tiName=((LocalRegTreeItem)tiName).computedValue.getThroughNotCompilable().getThroughDuplicate();
    }
  }
  GraphTargetItem tiName2=other.name;
  if (tiName2 != null) {
    tiName2=tiName2.getThroughDuplicate();
  }
  while (tiName2 instanceof LocalRegTreeItem) {
    if (((LocalRegTreeItem)tiName2).computedValue != null) {
      tiName2=((LocalRegTreeItem)tiName2).computedValue.getThroughNotCompilable().getThroughDuplicate();
    }
  }
  if (tiName != tiName2) {
    return false;
  }
  GraphTargetItem tiNameSpace=namespace;
  if (tiNameSpace != null) {
    tiNameSpace=tiNameSpace.getThroughDuplicate();
  }
  while (tiNameSpace instanceof LocalRegTreeItem) {
    if (((LocalRegTreeItem)tiNameSpace).computedValue != null) {
      tiNameSpace=((LocalRegTreeItem)tiNameSpace).computedValue.getThroughNotCompilable().getThroughDuplicate();
    }
  }
  GraphTargetItem tiNameSpace2=other.namespace;
  if (tiNameSpace2 != null) {
    tiNameSpace2=tiNameSpace2.getThroughDuplicate();
  }
  while (tiNameSpace2 instanceof LocalRegTreeItem) {
    if (((LocalRegTreeItem)tiNameSpace2).computedValue != null) {
      tiNameSpace2=((LocalRegTreeItem)tiNameSpace2).computedValue.getThroughNotCompilable().getThroughDuplicate();
    }
  }
  if (tiNameSpace != tiNameSpace2) {
    return false;
  }
  return true;
}

Fixed version (ground truth):
public boolean compareSame(FullMultinameTreeItem other){
  if (multinameIndex != other.multinameIndex) {
    return false;
  }
  GraphTargetItem tiName=name;
  if (name != null) {
    name=name.getThroughDuplicate();
  }
  while (tiName instanceof LocalRegTreeItem) {
    if (((LocalRegTreeItem)tiName).computedValue != null) {
      tiName=((LocalRegTreeItem)tiName).computedValue.getThroughNotCompilable().getThroughDuplicate();
    }
 else {
      break;
    }
  }
  GraphTargetItem tiName2=other.name;
  if (tiName2 != null) {
    tiName2=tiName2.getThroughDuplicate();
  }
  while (tiName2 instanceof LocalRegTreeItem) {
    if (((LocalRegTreeItem)tiName2).computedValue != null) {
      tiName2=((LocalRegTreeItem)tiName2).computedValue.getThroughNotCompilable().getThroughDuplicate();
    }
 else {
      break;
    }
  }
  if (tiName != tiName2) {
    return false;
  }
  GraphTargetItem tiNameSpace=namespace;
  if (tiNameSpace != null) {
    tiNameSpace=tiNameSpace.getThroughDuplicate();
  }
  while (tiNameSpace instanceof LocalRegTreeItem) {
    if (((LocalRegTreeItem)tiNameSpace).computedValue != null) {
      tiNameSpace=((LocalRegTreeItem)tiNameSpace).computedValue.getThroughNotCompilable().getThroughDuplicate();
    }
  }
  GraphTargetItem tiNameSpace2=other.namespace;
  if (tiNameSpace2 != null) {
    tiNameSpace2=tiNameSpace2.getThroughDuplicate();
  }
  while (tiNameSpace2 instanceof LocalRegTreeItem) {
    if (((LocalRegTreeItem)tiNameSpace2).computedValue != null) {
      tiNameSpace2=((LocalRegTreeItem)tiNameSpace2).computedValue.getThroughNotCompilable().getThroughDuplicate();
    }
  }
  if (tiNameSpace != tiNameSpace2) {
    return false;
  }
  return true;
}