props defined in extended component's mixins are not registered

[thedamon]

In a setup where a component defines a prop through a mixin, the web-component that extends that component does not have access to the mixin's props

Pseudocode:

const mixin = { props: { 'test' } };

const base = {
 name: 'v-base',
 mixins: [mixin]
};

const extender = {
 name: 'v-extender',
 extends: base
}

const mixiner = {
 name: 'v-extender',
 extends: base,
 mixins: [mixin]
}

extender.test // <-- not defined
mixiner.test // <-- works

It's straightforward to work around this and may just be something that was never consciously implemented?