TIL: CoreSimulator logs

Adding an Intent Extension to an existing WatchKit app, and trying to run the project in the simulator immediately after will not work, at least on the latest Xcode9 beta.

The error message does not look very helpful:

Somehow I recalled reading a few days ago that the simulator logs to ~/Library/Logs/CoreSimulator/CoreSimulator.log

So I checked the logs in Console, and I found this:

And there is the actual reason. A Siri Intent extension without actual intents is preventing the app from installing in the simulator.

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