EXC_BAD_ACCESS on app.swipeLeft()

Hello John! Thank you very much for your blog post about UI Tests! It was very infromative and explanatory. I wanted to check out attached example also and unfortunately I am getting the exception all over again.

exception is raised on the first: `app.swipeLeft()` action.
`Thread 1: EXC_BAD_ACCESS (code=1, address=0x0)`
I am using Xcode version: 9.4.1 (9F2000)

Console log:
```
Test Suite 'OnboardingUITests' started at 2018-09-21 09:02:04.447
Test Case '-[ExampleUITests.OnboardingUITests testGoingThroughOnboarding]' started.
t = 0.00s Start Test at 2018-09-21 09:02:04.449
t = 0.16s Set Up
t = 0.18s Open com.johnsundell.Example
t = 0.25s Launch com.johnsundell.Example
t = 3.83s Wait for com.johnsundell.Example to idle
t = 7.18s Swipe left Target Application 0x6000000c9b50
t = 7.18s Wait for com.johnsundell.Example to idle
t = 7.22s Find the Target Application 0x6000000c9b50
t = 7.34s Synthesize event
```

Has anybody else experienced such behaviour? I would be very grateful if you could guide me to any possible solution.