应用程序崩溃，但没有测试飞行坠毁报告

I have one user (with an iPhone 5) reporting that my app crashes on launch about 15 seconds after the screen goes black (the splash screen is black). The user downloaded a TestFlight build where I included checkpoints in the App delegate, but I don't get evidence that those checkpoints are crossed, and I never get a crash report.I have one user (with an iPhone 5) reporting th