Xcode 10 GM: XCUIScreen.main.screenshot() crashes with `dyld: lazy symbol binding failed`

When I run XCUIScreen.main.screenshot() (in Xcode 10 GM) from an XCTestCase the test crashes with:

dyld: lazy symbol binding failed: can't resolve symbol _XCStringFromRect in /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/lib/../../Library/Frameworks/XCTest.framework/XCTest because dependent dylib #12 could not be loaded
dyld: can't resolve symbol _XCStringFromRect in /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/lib/../../Library/Frameworks/XCTest.framework/XCTest because dependent dylib #12 could not be loaded