[Addon Info] React warns unique "key" prop when using PropTypes.oneOfType

[lhnrd]

Issue details

The warning below appeared after I updated addon-info to 3.3.3. It happens when I use PropTypes.oneOfType, I think it got something to do with PropTables rendering.

warning.js:33 Warning: Each child in an array or iterator should have a unique "key" prop.

Check the render method of `OneOfType`. See https://fb.me/react-warning-keys for more information.
    in span (created by OneOfType)
    in OneOfType (created by PrettyPropType)
    in PrettyPropType (created by PropTable)
    in td (created by glamorous(td))
    in glamorous(td) (created by PropTable)
    in tr (created by PropTable)
    in tbody (created by PropTable)
    in table (created by glamorous(table))
    in glamorous(table) (created by PropTable)
    in PropTable
    in Unknown (created by Story)
    in div (created by Story)
    in div (created by Story)
    in div (created by Story)
    in div (created by Story)
    in div (created by Story)
    in Story
    in ThemeProvider

Steps to reproduce

1. Create a component
2. Add a story with withInfo
3. Add PropTypes.oneOfType to component's propTypes

Please specify which version of Storybook and optionally any affected addons that you're running

• @storybook/react 3.3.3
• @storybook/addon-info 3.3.3

[igor-dv]

Don't we use "merged" label until it's published? Or are there new policies? =)

[Hypnosphi]

Sorry I forgot about github magic words