Spring @Autowired lateinit var throw kotlin.UninitializedPropertyAccessException in custom validator when persistent data by Jpa.

java version:11 kotlin version:1.3.41 springboot version: 2.1.6.RELEASE spring version: 5.1.8.RELEASE

Success when validate params in controller, throw UninitializedPropertyAccessException when validate entity classes before persistent data by jpa.

Use java also throws NPE.

/**用户名的校验器。*/
open class UsernameValidator : ConstraintValidator<Username, String> {
    @Autowired private lateinit var validationProperties: ValidationProperties

    override fun isValid(value: String, context: ConstraintValidatorContext): Boolean {
        //6~16位的字母、数字和下划线。
        return value.matches(validationProperties.username.toRegex())
    }
}

//No problems in Controller

//Service
    override fun registerByEmail(form: EmailRegisterForm): User {
        val savedUser = User(
            nickname = form.nickname,
            username = form.username,
            email = form.email,
            password = passwordEncoder.encode(form.password)
        )
        savedUser.activateCode = UUID.randomUUID().toString()
               //throws `UninitializedPropertyAccessException` Here!!!
        return userRepository.save(savedUser)
    }

IU-191.8026.42, JRE 11.0.2 9-b159.64x64 JetBrains s.r.o, OS Windows 10(amd64) v10.0 , screens 1366x768

Comment From: sdeleuze

Hi, sorry for the delay. Could you please provide a reproducer?

Comment From: spring-projects-issues

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Comment From: spring-projects-issues

Closing due to lack of requested feedback. If you would like us to look at this issue, please provide the requested information and we will re-open the issue.