@tyfoo Thanks for this PR. However, the issue you discribed is already fixed by #1922.
@shaurya947 Should we close this one?

@oliviertassinari thanks for the quick feedback.

I am not sure #1922 solves this issue, as clock.jsx does not use muiTheme from the context.

I believe the issue is cause by line 96 in clock.jsx:

let styles = {
      root: {},

      container: {
        height: 280,
        padding: 10,
      },
    };

which it then passes to prepareStyles in line 118:

<div style={this.prepareStyles(styles.root)}>

I believe that gets passed down as undefined or null which throws and exception in ensureDirection.

@oliviertassinari I'm thinking if we can solve the problem at its root (prepareStyles)

See my last comment on #1674 guys

@oliviertassinari @shaurya947 Thanks for the feedback. Should I close this PR?

@tyfoo Yes, I think that we can close this PR since the orignal issue is solved.