Invalid categories supplied to VictoryAxis in 0.24.1

[kujon]

Consider the following snippet:

<VictoryChart>
    <VictoryGroup
        data={[
            {x: 0, y: 2},
            {x: 5, y: 5}
        ]}
    >
        <VictoryLine />
        <VictoryAxis dependentAxis />
        <VictoryAxis />
    </VictoryGroup>
</VictoryChart>

In Victory 0.24.1 this results in the following prop types error:

warning.js:33 Warning: Failed prop type: Invalid prop `categories` of type `object` supplied to `VictoryAxis`, expected an array.
    in VictoryAxis (created by App)
    in VictoryGroup (created by App)
    in svg (created by VictoryContainer)
    in div (created by VictoryContainer)
    in VictoryContainer
    in VictoryChart (created by App)
    in div (created by App)
    in App

VictoryAxis turns out to be getting an empty object as categories upon inspection.