我们用的 bugly 收集bug，报了一些 JSDownloaderDelegator 的崩溃提示 SIGBUS BUS_ADRALN，引擎宝宝是 3.10
dtddz_pro-mobile void* std::__1::__thread_proxy<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_deletestd::__1::__thread_struct >, void (__JSDownloaderDelegator::)(), __JSDownloaderDelegator> >(void*) + 3416556
10 QuartzCore CA::Display::DisplayLink::dispatch_items(unsigned long long, unsigned long long, unsigned long long) + 672
11 IOKit IODispatchCalloutFromCFMessage + 392
12 CoreFoundation ___CFMachPortPerform + 188
13 CoreFoundation _CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION + 56
14 CoreFoundation ___CFRunLoopDoSource1 + 440
15 CoreFoundation ___CFRunLoopRun + 2196
16 CoreFoundation CFRunLoopRunSpecific + 436