tapestry5.4-beta-2 validate flow is stranger

[Zhou Yongcheng]

when execute component self validate, can not get the input value.
the following is the detail, I input 200 on the age textfield. but age = 0
in onValidateFromAge() method, stranger.
       @Log
void onValidateFromAge() throws ValidationException {
log.debug("age = " + age);   // NG  expected = 200, result = 0
if (age > 100) {
throw new ValidationException("age must be less 100");
}
}
 @Log
void onValidateFromInputForm() throws ValidationException {
log.debug("ageForm ---" + age);   // OK expected = 200, result = 200
log.debug("nameForm ---" + name);
if ("refused".equals(name)) {
throw new ValidationException("you have been refused!");
}
log.debug("----------after validate-----------");
}