I have gotten the following crash now two times in an app that is otherwise used a lot and is running fine:
Reason: -[NSNull startAccessingSecurityScopedResource]: unrecognized selector sent to instance 0x1f277c230
Stacktrace: (
0 CoreFoundation 0x000000019c48087c B37A1273-B0C2-312E-9E0B-7143FB645C69 + 968828
1 libobjc.A.dylib 0x000000019479fc00 objc_exception_throw + 60
2 CoreFoundation 0x000000019c51119c B37A1273-B0C2-312E-9E0B-7143FB645C69 + 1560988
3 CoreFoundation 0x000000019c3c5ff8 B37A1273-B0C2-312E-9E0B-7143FB645C69 + 204792
4 CoreFoundation 0x000000019c506b10 _CF_forwarding_prep_0 + 96
5 UIKitCore 0x000000019edae6a8 F1A8BD61-9CF2-3054-B622-CB63D6CEB4CB + 8349352
6 QuickLook 0x000000020ea213b4 D43C66FB-A39B-304E-A81B-8ADBFAAE2882 + 308148
7 QuickLook 0x000000020ea415bc D43C66FB-A39B-304E-A81B-8ADBFAAE2882 + 439740
8 QuickLook 0x000000020ea3ff38 D43C66FB-A39B-304E-A81B-8ADBFAAE2882 + 433976
9 QuickLook 0x000000020ea40378 D43C66FB-A39B-304E-A81B-8ADBFAAE2882 + 435064
10 libdispatch.dylib 0x00000001a434f6a8 89420547-98A3-352A-AD2B-BBCB6006FB29 + 9896
11 libdispatch.dylib 0x00000001a4351300 89420547-98A3-352A-AD2B-BBCB6006FB29 + 17152
12 libdispatch.dylib 0x00000001a435f998 89420547-98A3-352A-AD2B-BBCB6006FB29 + 76184
13 libdispatch.dylib 0x00000001a435f5b0 _dispatch_main_queue_callback_4CF + 44
14 CoreFoundation 0x000000019c3cb20c B37A1273-B0C2-312E-9E0B-7143FB645C69 + 225804
15 CoreFoundation 0x000000019c3c7f18 B37A1273-B0C2-312E-9E0B-7143FB645C69 + 212760
16 CoreFoundation 0x000000019c3c7668 CFRunLoopRunSpecific + 608
17 GraphicsServices 0x00000001df7925ec GSEventRunModal + 164
18 UIKitCore 0x000000019e7e42b4 F1A8BD61-9CF2-3054-B622-CB63D6CEB4CB + 2278068
19 UIKitCore 0x000000019e7e38f0 UIApplicationMain + 340
20 MyApp 0x0000000102c06280 MyApp + 483968
21 dyld 0x00000001bee1adcc A795AD37-6266-385E-95E6-C1CA804C926E + 24012
)
The symbol MyApp + 483968 just resolves to the main() function.
I'm not using this startAccessingSecurityScopedResource anywhere in my app. What could I do to debug this issue?