我通过XCode Organizer / Crashes选项卡获得了大量的应用崩溃报告
然而，堆栈跟踪没有显示任何异常类型，只是指向在后台线程中运行的递归方法（通过dispatch_async）（并且它不是无限递归，它是一种有限的搜索方法深度）。我无法弄清楚为什么会发生这种崩溃。我尝试在真实设备中重现崩溃，但不能。这可能是一个密集的CPU任务，并被操作系统杀死？我如何验证是否是这种情况？任何帮助都会很感激！
#0 (null) in _TFC11MyAppFree17SearcherP33_D7BE9E167FAD2091BF2475359F0659466searchfS0_FTSi5aSi4bSi_Si ()
#1 (null) in _TFC11MyAppFree17SearcherP33_D7BE9E167FAD2091BF2475359F0659466searchfS0_FTSi5aSi4bSi_Si at Searcher.swift:115
#2 (null) in _TFC11MyAppFree17SearcherP33_D7BE9E167FAD2091BF2475359F0659466searchfS0_FTSi5aSi4bSi_Si at Searcher.swift:115
#3 (null) in _TFC11MyAppFree17SearcherP33_D7BE9E167FAD2091BF2475359F0659466searchfS0_FTSi5aSi4bSi_Si at Searcher.swift:115
#4 (null) in _TFC11MyAppFree17SearcherP33_D7BE9E167FAD2091BF2475359F0659466searchfS0_FTSi5aSi4bSi_Si at Searcher.swift:115
#5 (null) in _TFC11MyAppFree17SearcherP33_D7BE9E167FAD2091BF2475359F0659466searchfS0_FTSi5aSi4bSi_Si at Searcher.swift:115
#6 (null) in _TFC11MyAppFree17SearcherP33_D7BE9E167FAD2091BF2475359F0659466searchfS0_FTSi5aSi4bSi_Si at Searcher.swift:115
#7 (null) in _TFC11MyAppFree17SearcherP33_D7BE9E167FAD2091BF2475359F0659466searchfS0_FTSi5aSi4bSi_Si at Searcher.swift:115
#8 (null) in _TFC11MyAppFree17SearcherP33_D7BE9E167FAD2091BF2475359F0659466searchfS0_FTSi5aSi4bSi_Si at Searcher.swift:115