[Bug Report] v-radio-group not selected initially with value type of "Object"

[haugero]

Environment

Vuetify Version: 2.2.12
Vue Version: 2.6.11
Browsers: Chrome 80.0.3987.87
OS: Mac OS 10.15.3

Steps to reproduce

Just open Codepen link and see the radio group

Expected Behavior

The radio button "two" is initially selected

Actual Behavior

No radio button is selected initially

Reproduction Link

https://codepen.io/ohauger/pen/gOpPpje

Other comments

I also tried to set the "value-comparator" with my own compare function BUT the function never get's called

[jacekkarczmarczyk]

Not a bug

VRadioGroup/VRadio doesn't have value comparator, you need to use the same object:

https://codepen.io/jkarczm/pen/YzXWRMe

[KaelWD]

[jacekkarczmarczyk]

how did i miss it

[KaelWD]

Or is it a bug? valueComparator was added in 78964e3 but then radios were refactored to use VItemGroup instead, which doesn't have valueComparator.

[ElijahKotyluk]

One of the base mixins for VRadioGroup is Comparable, but if you pass value-comparator a function it doesn't ever get called.

[Tofandel]

Revisiting this, I just encountered this bug, the value comparator mixin is indeed applied on the VRadioGroup but never used, effectively making the whole radio group with object as values case invalid #1316

As for the doc part it also inherits the "multiple" prop and the doc picks it up, but it doesn't make sense to have multiple values for VRadioGroup, I don't know if anything can be done there