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Thanks for the PR! I think though that this'll need to be conditional as accessing the cxx method can panic for non-host targets. Mind either changing cxx to return an Option or have a similar check?

I've made it return a Result, since unwrapping an Option wouldn't provide a useful error message.

@bors: r+

Thanks!

📌 Commit f98ffb5 has been approved by alexcrichton

@bors rollup