cyclic dependency error

My project builds with bazel and via a tulsi-generated project, but fails with the following error using xchammer's generated xcode project:

```
Showing All Messages Cycle in dependencies between targets 'Arc-exception-safe' and 'Core'; building could produce unreliable results. Cycle path: Arc-exception-safe → Core → Arc-exception-safe Cycle details: → Target 'Arc-exception-safe': Libtool .../libArc-exception-safe.a normal Target 'Arc-exception-safe' has target dependency on Target 'Core' → Target 'Core' has target dependency on Target 'Arc-exception-safe'
```

Also, the first build always fails with "Xcode project was out-of-date so we updated it for you! Please build again.".

Oddly, before this, I was getting a different error where Texture classes were failing to link. Now, I no longer get that, as there seems to be some state that hangs around even if I delete the project directory and rebuild the project target. Is there a way to force regenerate or invalidate the generated project files?