Embed vue-validator in my custom component cause validator undefined error

[303248153]

Hello, I'm trying to embed validator component in my custom component, here is the template

<template>
    <validator name="validation">
        <form novalidate>
            <slot></slot>
        </form>
    </validator>
</template>

When I do this I get an error "a is undefined", and a is from

setupValidate: function setupValidate(t, i, e) {
            var n = this.params,
                a = this.validator = this.vm._validatorMaps[t];this.field 

Looks like contents slot get evaluate first, how can I resolve this problem?