Faulting in NSHTTPCookieStorage singleton?

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Created Dec ’15

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I recently developed a Mac app that runs perfectly fine on my machine, but crashes on one of my beta tester's. I've been sent the crash report, but I honestly have no idea how to decipher the issue. From what I can tell, the salient issue is described in the Global Trace Buffer:

Global Trace Buffer (reverse chronological seconds):
18446744049.082520 CFNetwork                  0x00007fff8882acdf TCP Conn 0x7fee28674dc0 started
18446744049.124989 CFNetwork                  0x00007fff887ee86b Creating default cookie storage with default identifier
18446744049.124989 CFNetwork                  0x00007fff887ee836 Faulting in CFHTTPCookieStorage singleton
18446744049.124989 CFNetwork                  0x00007fff887ee6c5 Faulting in NSHTTPCookieStorage singleton

And the exception description:

Crashed Thread:        0  Dispatch queue: com.apple.main-thread
Exception Type:        EXC_BAD_INSTRUCTION (SIGILL)
Exception Codes:       0x0000000000000001, 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

However, thread 0 says the following:

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.charliecarver.Sightings    0x000000010afb8907 0x10af3d000 + 506119
1   com.charliecarver.Sightings    0x000000010afb5e95 0x10af3d000 + 495253
2   com.apple.CoreFoundation       0x00007fff91108c9c __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
3   com.apple.CoreFoundation       0x00007fff91108c2f ___CFXRegistrationPost_block_invoke + 63
4   com.apple.CoreFoundation       0x00007fff91108ba7 _CFXRegistrationPost + 407
5   com.apple.CoreFoundation       0x00007fff91108912 ___CFXNotificationPost_block_invoke + 50
6   com.apple.CoreFoundation       0x00007fff910c56d2 -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1922
7   com.apple.CoreFoundation       0x00007fff910c4925 _CFXNotificationPost + 693
8   com.apple.Foundation           0x00007fff9810f0fa -[NSNotificationCenter postNotificationName:object:userInfo:] + 66
9   com.apple.AppKit               0x00007fff900b6ea1 -[NSApplication _postDidFinishNotification] + 297
10  com.apple.AppKit               0x00007fff900b6c0b -[NSApplication _sendFinishLaunchingNotification] + 203
11  com.apple.AppKit               0x00007fff8ff71dc1 -[NSApplication(NSAppleEventHandling) _handleAEOpenEvent:] + 557
12  com.apple.AppKit               0x00007fff8ff7186b -[NSApplication(NSAppleEventHandling) _handleCoreEvent:withReplyEvent:] + 250
13  com.apple.Foundation           0x00007fff9815da8d -[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:] + 290
14  com.apple.Foundation           0x00007fff9815d907 _NSAppleEventManagerGenericHandler + 102
15  com.apple.AE                   0x00007fff89c4e1b5 aeDispatchAppleEvent(AEDesc const*, AEDesc*, unsigned int, unsigned char*) + 531
16  com.apple.AE                   0x00007fff89c4df3c dispatchEventAndSendReply(AEDesc const*, AEDesc*) + 31
17  com.apple.AE                   0x00007fff89c4de58 aeProcessAppleEvent + 288
18  com.apple.HIToolbox            0x00007fff99f2bef5 AEProcessAppleEvent + 55
19  com.apple.AppKit               0x00007fff8ff6d230 _DPSNextEvent + 2245
20  com.apple.AppKit               0x00007fff8ff6c1c5 -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454
21  com.apple.AppKit               0x00007fff8ff60d28 -[NSApplication run] + 682
22  com.apple.AppKit               0x00007fff8ff29fbe NSApplicationMain + 1176
23  com.charliecarver.Sightings    0x000000010afb7019 0x10af3d000 + 499737
24  libdyld.dylib                  0x00007fff998435ad start + 1

Does this actually have to do with "Faulting in NSHTTPCookieStorage singleton"? How would I go about debugging this?

Edit:

I was able to symbolicate the crash log and saw this:

Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x00007fff773dad90  rbx: 0x0000000000000000  rcx: 0x00007fff78c65c58  rdx: 0x0040000000000000
rdi: 0x00007fff788aea50  rsi: 0x00007fff914c7a02  rbp: 0x00007fff54cc1450  rsp: 0x00007fff54cc13f0
  r8: 0x0000000000000000   r9: 0x00007fee2866e8b0  r10: 0x00007fee28892620  r11: 0x00007fff78c65c58
r12: 0x00007fff788aea50  r13: 0x0000000000000000  r14: 0x00007fff78abbb20  r15: 0x00007fee28665440
rip: 0x000000010afb8907 specialized AppDelegate.applicationDidFinishLaunching(NSNotification) -> () (in Sightings) (AppDelegate.swift:60)

Line 60 of my code looks like this:

sortMenu.itemWithTag(tag)?.state = NSOnState

Is that the culprit?

Edit 2:

I commented out itemWithTag and ran it on his machine again, and this time the app crashed at this line:

shareMenu.addItem(menuItem)

None of this is making sense to me, but it's only crashing (so far, at least) around code related to NSMenus...

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Answer 1

DTS Engineer OP

Apple

Dec ’15

Does this actually have to do with "Faulting in NSHTTPCookieStorage singleton"?

That’s probably a red herring. The global trace buffer just shows you what your app was doing shortly before the crash; it does not necessarily indicate what caused the crash.

Given the exception type, it’s likely that you’d crashing because you’re doing something that’s trapped by Swift’s safety net. For example, unwrapping an option (implicitly or explicitly) or accessing outside the bounds of an array. Realistically your best way forward here is to symbolicate frames 0 through 1 of the crash log; they’re the most obvious indication as to what went wrong.

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