Program: 61607
Project: 61607
Buggy source:
public ValueKind getValueKind(int ns,GraphTargetItem type,GraphTargetItem val){
  if (val instanceof BooleanAVM2Item) {
    BooleanAVM2Item bi=(BooleanAVM2Item)val;
    if (bi.value) {
      return new ValueKind(0,ValueKind.CONSTANT_True);
    }
 else {
      return new ValueKind(0,ValueKind.CONSTANT_False);
    }
  }
  boolean isNs=false;
  if (type instanceof NameAVM2Item) {
    if (((NameAVM2Item)type).getVariableName().equals("String_Node_Str")) {
      isNs=true;
    }
  }
  if ((type instanceof TypeItem) && (((TypeItem)type).fullTypeName.equals("String_Node_Str"))) {
    isNs=true;
  }
  if (val instanceof StringAVM2Item) {
    StringAVM2Item sval=(StringAVM2Item)val;
    if (isNs) {
      return new ValueKind(namespace(abc.constants.constant_namespace.get(ns).kind,sval.value),Namespace.KIND_NAMESPACE);
    }
 else {
      return new ValueKind(str(sval.value),ValueKind.CONSTANT_Utf8);
    }
  }
  if (val instanceof IntegerValueAVM2Item) {
    return new ValueKind(abc.constants.getIntId(((IntegerValueAVM2Item)val).value,true),ValueKind.CONSTANT_Int);
  }
  if (val instanceof FloatValueAVM2Item) {
    return new ValueKind(abc.constants.getDoubleId(((FloatValueAVM2Item)val).value,true),ValueKind.CONSTANT_Double);
  }
  if (val instanceof NanAVM2Item) {
    return new ValueKind(abc.constants.getDoubleId(Double.NaN,true),ValueKind.CONSTANT_Double);
  }
  if (val instanceof NullAVM2Item) {
    return new ValueKind(0,ValueKind.CONSTANT_Null);
  }
  if (val instanceof UndefinedAVM2Item) {
    return new ValueKind(0,ValueKind.CONSTANT_Undefined);
  }
  return null;
}

Fixed version (ground truth):
public ValueKind getValueKind(int ns,GraphTargetItem type,GraphTargetItem val){
  if (val instanceof BooleanAVM2Item) {
    BooleanAVM2Item bi=(BooleanAVM2Item)val;
    if (bi.value) {
      return new ValueKind(0,ValueKind.CONSTANT_True);
    }
 else {
      return new ValueKind(0,ValueKind.CONSTANT_False);
    }
  }
  boolean isNs=false;
  if (type instanceof NameAVM2Item) {
    if (((NameAVM2Item)type).getVariableName().equals("String_Node_Str")) {
      isNs=true;
    }
  }
  if ((type instanceof TypeItem) && (((TypeItem)type).fullTypeName.equals("String_Node_Str"))) {
    isNs=true;
  }
  if (val instanceof StringAVM2Item) {
    StringAVM2Item sval=(StringAVM2Item)val;
    if (isNs) {
      return new ValueKind(namespace(Namespace.KIND_NAMESPACE,sval.value),ValueKind.CONSTANT_Namespace);
    }
 else {
      return new ValueKind(str(sval.value),ValueKind.CONSTANT_Utf8);
    }
  }
  if (val instanceof IntegerValueAVM2Item) {
    return new ValueKind(abc.constants.getIntId(((IntegerValueAVM2Item)val).value,true),ValueKind.CONSTANT_Int);
  }
  if (val instanceof FloatValueAVM2Item) {
    return new ValueKind(abc.constants.getDoubleId(((FloatValueAVM2Item)val).value,true),ValueKind.CONSTANT_Double);
  }
  if (val instanceof NanAVM2Item) {
    return new ValueKind(abc.constants.getDoubleId(Double.NaN,true),ValueKind.CONSTANT_Double);
  }
  if (val instanceof NullAVM2Item) {
    return new ValueKind(0,ValueKind.CONSTANT_Null);
  }
  if (val instanceof UndefinedAVM2Item) {
    return new ValueKind(0,ValueKind.CONSTANT_Undefined);
  }
  return null;
}