Program: 31658
Project: 31658
Buggy source:
private void registerDefaultFieldConverters(ClassInfo classInfo){
  for (  FieldInfo fieldInfo : classInfo.fieldsInfo().fields()) {
    if (!fieldInfo.hasConverter()) {
      if (fieldInfo.getDescriptor().contains(dateSignature) || (fieldInfo.getTypeParameterDescriptor() != null && fieldInfo.getTypeParameterDescriptor().contains(dateSignature))) {
        setDateFieldConverter(fieldInfo);
      }
 else       if (fieldInfo.getDescriptor().contains(bigIntegerSignature) || (fieldInfo.getTypeParameterDescriptor() != null && fieldInfo.getTypeParameterDescriptor().contains(bigIntegerSignature))) {
        setBigIntegerFieldConverter(fieldInfo);
      }
 else       if (fieldInfo.getDescriptor().contains(bigDecimalSignature) || (fieldInfo.getTypeParameterDescriptor() != null && fieldInfo.getTypeParameterDescriptor().contains(bigDecimalSignature))) {
        setBigDecimalConverter(fieldInfo);
      }
 else       if (fieldInfo.getDescriptor().contains(byteArraySignature)) {
        fieldInfo.setConverter(ConvertibleTypes.getByteArrayBase64Converter());
      }
 else       if (fieldInfo.getDescriptor().contains(byteArrayWrapperSignature)) {
        fieldInfo.setConverter(ConvertibleTypes.getByteArrayWrapperBase64Converter());
      }
 else {
        if (fieldInfo.getAnnotations().get(Convert.CLASS) != null) {
          Class<?> entityAttributeType=ClassUtils.getType(fieldInfo.getDescriptor());
          String graphTypeDescriptor=fieldInfo.getAnnotations().get(Convert.CLASS).get(Convert.GRAPH_TYPE,null);
          if (graphTypeDescriptor == null) {
            throw new MappingException("String_Node_Str" + entityAttributeType.getName() + "String_Node_Str"+ classInfo.name()+ '.'+ fieldInfo.getName()+ "String_Node_Str");
          }
          fieldInfo.setConverter(new ProxyAttributeConverter(entityAttributeType,ClassUtils.getType(graphTypeDescriptor),this.conversionCallbackRegistry));
        }
        Class descriptorClass=getDescriptorClass(fieldInfo.getDescriptor());
        Class typeParamDescriptorClass=getDescriptorClass(fieldInfo.getTypeParameterDescriptor());
        for (        Class enumClass : enumTypes) {
          if (descriptorClass != null && descriptorClass.equals(enumClass) || (typeParamDescriptorClass != null && typeParamDescriptorClass.equals(enumClass))) {
            setEnumFieldConverter(fieldInfo,enumClass);
          }
        }
      }
    }
  }
}

Fixed version (ground truth):
private void registerDefaultFieldConverters(ClassInfo classInfo,FieldInfo fieldInfo){
  if (!fieldInfo.hasConverter()) {
    if (fieldInfo.getDescriptor().contains(dateSignature) || (fieldInfo.getTypeParameterDescriptor() != null && fieldInfo.getTypeParameterDescriptor().contains(dateSignature))) {
      setDateFieldConverter(fieldInfo);
    }
 else     if (fieldInfo.getDescriptor().contains(bigIntegerSignature) || (fieldInfo.getTypeParameterDescriptor() != null && fieldInfo.getTypeParameterDescriptor().contains(bigIntegerSignature))) {
      setBigIntegerFieldConverter(fieldInfo);
    }
 else     if (fieldInfo.getDescriptor().contains(bigDecimalSignature) || (fieldInfo.getTypeParameterDescriptor() != null && fieldInfo.getTypeParameterDescriptor().contains(bigDecimalSignature))) {
      setBigDecimalConverter(fieldInfo);
    }
 else     if (fieldInfo.getDescriptor().contains(byteArraySignature)) {
      fieldInfo.setConverter(ConvertibleTypes.getByteArrayBase64Converter());
    }
 else     if (fieldInfo.getDescriptor().contains(byteArrayWrapperSignature)) {
      fieldInfo.setConverter(ConvertibleTypes.getByteArrayWrapperBase64Converter());
    }
 else {
      if (fieldInfo.getAnnotations().get(Convert.CLASS) != null) {
        Class<?> entityAttributeType=ClassUtils.getType(fieldInfo.getDescriptor());
        String graphTypeDescriptor=fieldInfo.getAnnotations().get(Convert.CLASS).get(Convert.GRAPH_TYPE,null);
        if (graphTypeDescriptor == null) {
          throw new MappingException("String_Node_Str" + entityAttributeType.getName() + "String_Node_Str"+ classInfo.name()+ '.'+ fieldInfo.getName()+ "String_Node_Str");
        }
        fieldInfo.setConverter(new ProxyAttributeConverter(entityAttributeType,ClassUtils.getType(graphTypeDescriptor),this.conversionCallbackRegistry));
      }
      Class descriptorClass=getDescriptorClass(fieldInfo.getDescriptor());
      Class typeParamDescriptorClass=getDescriptorClass(fieldInfo.getTypeParameterDescriptor());
      for (      Class enumClass : enumTypes) {
        if (descriptorClass != null && descriptorClass.equals(enumClass) || (typeParamDescriptorClass != null && typeParamDescriptorClass.equals(enumClass))) {
          setEnumFieldConverter(fieldInfo,enumClass);
        }
      }
    }
  }
}