Scoped Slot delegate to child component. Slot is in child component always set, also if it not set

[MaximilianFranke]

Version

2.5.17

Reproduction link

https://codesandbox.io/s/j1451yzrm5

Steps to reproduce

Open sample

What is expected?

The output of the second sample should be:
....
Child component...has scopedslot: false
....

What is actually happening?

The output of the second sample is:
....
Child component...has scopedslot: true
....

[MaximilianFranke]

also interesting if you remove the v-if in Parent.vue the default of the basicslot is still rendered but the default of the scopedslot isn't anymore.

[posva]

It's because it's a function, so you have to call it to check if the result is undefined (or an empty array in the future #8056). In the Parent component there's always the scoped slot in the template but that's not the case in App.vue, so the function may also not exist