Program: 32696
Project: 32696
Buggy source:
public Builder(){
  super();
  serializers=new HashMap<>();
  deserializers=new HashMap<>();
  deserializersByName=new HashMap<>();
  instanceCreators=new HashMap<>();
  builderOptions=new DefaultVPackBuilderOptions();
  serializeNullValues=false;
  instanceCreators.put(Collection.class,VPackInstanceCreators.COLLECTION);
  instanceCreators.put(List.class,VPackInstanceCreators.LIST);
  instanceCreators.put(Set.class,VPackInstanceCreators.SET);
  instanceCreators.put(Map.class,VPackInstanceCreators.MAP);
  serializers.put(String.class,VPackSerializers.STRING);
  serializers.put(Boolean.class,VPackSerializers.BOOLEAN);
  serializers.put(boolean.class,VPackSerializers.BOOLEAN);
  serializers.put(Integer.class,VPackSerializers.INTEGER);
  serializers.put(int.class,VPackSerializers.INTEGER);
  serializers.put(Long.class,VPackSerializers.LONG);
  serializers.put(long.class,VPackSerializers.LONG);
  serializers.put(Short.class,VPackSerializers.SHORT);
  serializers.put(short.class,VPackSerializers.SHORT);
  serializers.put(Double.class,VPackSerializers.DOUBLE);
  serializers.put(double.class,VPackSerializers.DOUBLE);
  serializers.put(Float.class,VPackSerializers.FLOAT);
  serializers.put(float.class,VPackSerializers.FLOAT);
  serializers.put(BigInteger.class,VPackSerializers.BIG_INTEGER);
  serializers.put(BigDecimal.class,VPackSerializers.BIG_DECIMAL);
  serializers.put(Number.class,VPackSerializers.NUMBER);
  serializers.put(Character.class,VPackSerializers.CHARACTER);
  serializers.put(char.class,VPackSerializers.CHARACTER);
  serializers.put(Date.class,VPackSerializers.DATE);
  serializers.put(VPackSlice.class,VPackSerializers.VPACK);
  deserializers.put(String.class,VPackDeserializers.STRING);
  deserializers.put(Boolean.class,VPackDeserializers.BOOLEAN);
  deserializers.put(boolean.class,VPackDeserializers.BOOLEAN);
  deserializers.put(Integer.class,VPackDeserializers.INTEGER);
  deserializers.put(int.class,VPackDeserializers.INTEGER);
  deserializers.put(Long.class,VPackDeserializers.LONG);
  deserializers.put(long.class,VPackDeserializers.LONG);
  deserializers.put(Short.class,VPackDeserializers.SHORT);
  deserializers.put(short.class,VPackDeserializers.SHORT);
  deserializers.put(Double.class,VPackDeserializers.DOUBLE);
  deserializers.put(double.class,VPackDeserializers.DOUBLE);
  deserializers.put(Float.class,VPackDeserializers.FLOAT);
  deserializers.put(float.class,VPackDeserializers.FLOAT);
  deserializers.put(BigInteger.class,VPackDeserializers.BIG_INTEGER);
  deserializers.put(BigDecimal.class,VPackDeserializers.BIG_DECIMAL);
  deserializers.put(Number.class,VPackDeserializers.NUMBER);
  deserializers.put(Character.class,VPackDeserializers.CHARACTER);
  deserializers.put(char.class,VPackDeserializers.CHARACTER);
  deserializers.put(Date.class,VPackDeserializers.DATE);
}

Fixed version (ground truth):
public Builder(){
  super();
  serializers=new HashMap<>();
  deserializers=new HashMap<>();
  deserializersByName=new HashMap<>();
  instanceCreators=new HashMap<>();
  builderOptions=new DefaultVPackBuilderOptions();
  serializeNullValues=false;
  instanceCreators.put(Collection.class,VPackInstanceCreators.COLLECTION);
  instanceCreators.put(List.class,VPackInstanceCreators.LIST);
  instanceCreators.put(Set.class,VPackInstanceCreators.SET);
  instanceCreators.put(Map.class,VPackInstanceCreators.MAP);
  serializers.put(String.class,VPackSerializers.STRING);
  serializers.put(Boolean.class,VPackSerializers.BOOLEAN);
  serializers.put(boolean.class,VPackSerializers.BOOLEAN);
  serializers.put(Integer.class,VPackSerializers.INTEGER);
  serializers.put(int.class,VPackSerializers.INTEGER);
  serializers.put(Long.class,VPackSerializers.LONG);
  serializers.put(long.class,VPackSerializers.LONG);
  serializers.put(Short.class,VPackSerializers.SHORT);
  serializers.put(short.class,VPackSerializers.SHORT);
  serializers.put(Double.class,VPackSerializers.DOUBLE);
  serializers.put(double.class,VPackSerializers.DOUBLE);
  serializers.put(Float.class,VPackSerializers.FLOAT);
  serializers.put(float.class,VPackSerializers.FLOAT);
  serializers.put(BigInteger.class,VPackSerializers.BIG_INTEGER);
  serializers.put(BigDecimal.class,VPackSerializers.BIG_DECIMAL);
  serializers.put(Number.class,VPackSerializers.NUMBER);
  serializers.put(Character.class,VPackSerializers.CHARACTER);
  serializers.put(char.class,VPackSerializers.CHARACTER);
  serializers.put(Date.class,VPackSerializers.DATE);
  serializers.put(VPackSlice.class,VPackSerializers.VPACK);
  deserializers.put(String.class,VPackDeserializers.STRING);
  deserializers.put(Boolean.class,VPackDeserializers.BOOLEAN);
  deserializers.put(boolean.class,VPackDeserializers.BOOLEAN);
  deserializers.put(Integer.class,VPackDeserializers.INTEGER);
  deserializers.put(int.class,VPackDeserializers.INTEGER);
  deserializers.put(Long.class,VPackDeserializers.LONG);
  deserializers.put(long.class,VPackDeserializers.LONG);
  deserializers.put(Short.class,VPackDeserializers.SHORT);
  deserializers.put(short.class,VPackDeserializers.SHORT);
  deserializers.put(Double.class,VPackDeserializers.DOUBLE);
  deserializers.put(double.class,VPackDeserializers.DOUBLE);
  deserializers.put(Float.class,VPackDeserializers.FLOAT);
  deserializers.put(float.class,VPackDeserializers.FLOAT);
  deserializers.put(BigInteger.class,VPackDeserializers.BIG_INTEGER);
  deserializers.put(BigDecimal.class,VPackDeserializers.BIG_DECIMAL);
  deserializers.put(Number.class,VPackDeserializers.NUMBER);
  deserializers.put(Character.class,VPackDeserializers.CHARACTER);
  deserializers.put(char.class,VPackDeserializers.CHARACTER);
  deserializers.put(Date.class,VPackDeserializers.DATE);
  deserializers.put(VPackSlice.class,VPackDeserializers.VPACK);
}