如何找到如下所示引发异常的代码？
这只发生在少数设备上，比如iPhone6运行iOS 10
以及
Application received signal SIGSEGV (null)
0 CoreFoundation 0x00000001831e01d8 <redacted> + 148
1 libobjc.A.dylib 0x0000000181c1855c objc_exception_throw + 56
2 CoreFoundation 0x00000001831e0108 <redacted> + 0
3 xxx 0x100464a00 xxx + 4606464
4 libsystem_platform.dylib 0x000000018226f338 _sigtramp + 36
5 UIKit 0x000000018902b588 <redacted> + 80
6 QuartzCore 0x00000001864ee448 <redacted> + 208
7 QuartzCore 0x00000001864e30e8 <redacted> + 292
8 QuartzCore 0x00000001864e2fa8 <redacted> + 32
9 QuartzCore 0x000000018645fc64 <redacted> + 252
10 QuartzCore 0x00000001864870d0 <redacted> + 512
11 QuartzCore 0x0000000186487af0 <redacted> + 120
12 CoreFoundation 0x000000018318d7dc <redacted> + 32
13 CoreFoundation 0x000000018318b40c <redacted> + 372
14 CoreFoundation 0x00000001830ba068 CFRunLoopRunSpecific + 476
15 WebCore 0x0000000187c5ba2c <redacted> + 456
16 libsystem_pthread.dylib 0x0000000182273860 <redacted> + 240
17 libsystem_pthread.dylib 0x0000000182273770 <redacted> + 0
18 libsystem_pthread.dylib 0x0000000182270dbc thread_start + 4