this._validityWatchers[name] is not a function 单页面路由跳转的时候报错，刷新之后正常了

[fuyidaotang]

TypeError: this._validityWatchers[name] is not a function
at Vue$3.unregister (eval at (app.js:886), :407:37)
at Vue$3.boundFn [as unregister] (eval at (app.js:616), :126:14)
at Validation.unregister (eval at (app.js:886), :558:29)
at VueComponent.destroyed (eval at (app.js:886), :1158:16)
at callHook (eval at (app.js:616), :2479:19)
at VueComponent.Vue.$destroy (eval at (app.js:616), :2463:5)
at destroy$1 (eval at (app.js:616), :2682:19)
at invokeDestroyHook (eval at (app.js:616), :4144:59)
at invokeDestroyHook (eval at (app.js:616), :4149:9)
at invokeDestroyHook (eval at (app.js:616), :4149:9)
麻烦能够尽快告诉我哪里错了吗

[ra100]

I'm getting same error, when trying to hide/remove component that has validator. I'm using v-if to show/hide form.
And related to #338