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e28974bc04
This re-works the portable `run()` API that consumes the `EventLoop` and runs the loop on the calling thread until the app exits. This can be supported across _all_ platforms and compared to the previous `run() -> !` API is now able to return a `Result` status on all platforms except iOS and Web. Fixes: #2709 By moving away from `run() -> !` we stop calling `std::process::exit()` internally as a means to kill the process without returning which means it's possible to return an exit status and applications can return from their `main()` function normally. This also fixes Android support where an Activity runs in a thread but we can't assume to have full ownership of the process (other services could be running in separate threads). Additionally all examples have generally been updated so that `main()` returns a `Result` from `run()` Fixes: #2709
