14 Replies
      Latest reply: Nov 21, 2016 8:50 AM by ashort RSS
      ashort Level 1 Level 1 (0 points)

        I'm getting a crash report that I don't know how to interpret.  In the XCode Organizer, it shows this:

         

        libobjc.A.dylib: objc_msgSend + 16

         

        Thread 0

             7          UIKit                   -[UIApplication _run]

             8          UIKit                   UIApplicationMain

             9          MyAppName     main

             10        libdyld.dylib       start

         

        Then when I click "Open in Project...", it shows this more comprehensive listing in XCode:

         

        Thread 0

        0     objc_msgSend ()

        1     __NSThreadPerformPerform

        2     __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__

        3     __CFRunLoopDoSources0

        4     __CFRunLoopRun

        5     CFRunLoopRunSpecific

        6     GSEventRunModal

        7     -[UIApplication _run]

        8     UIApplicationMain

        9     main

        10   start

         

        But in XCode it does not take me to any specific place or line of code in the project.  So I have no clue if the problem is in my code or Apple's code, or even where to start looking.  The __NSThreadPerformPerform on line 0 of the report makes me think it's some kind of @selector message that is being sent to a deallocated instance, but if that's true, why doesn't it say so and why doesn't it tell me the line of code that caused the crash.  I also cannot determine from looking at this whether this crash is because of my code, or something buried in Apple's code.   Any help is appreciated.   I've tested my app to death in the debugger - no crashes.  Also, this must be an extremely rare crash, as I've only received 1 crash report.

        • Re: crash report _NSThreadPerformPerform
          QuinceyMorris Level 7 Level 7 (3,285 points)

          Something in your app (though possibly not in code you wrote explicitly) is doing a "performSelector" as a way of deferring execution of a method until the next iteration of the run-loop. When it finally got to executing the method, it crashed in objc_msgSend, trying to enter the method. Because this is a highly optimized piece of the system frameworks, there are no debug symbols to help you. You can try to find (e.g.) the selector from a pointer in machine registers:

           

          www.sealiesoftware.com/blog/archive/2008/09/22/objc_explain_So_you_crashed_in_objc_msgSend.html

           

          The likelihood, though, is that you have a memory management bug in your app, so that (e.g.) the object that is supposed to receive the selector message has been deallocated. It is unwise to assume that the bug is in Apple's code.

           

          Finding memory management bugs that produce rare crashes is difficult. General testing is unlikely to help. You should either try to re-create the conditions under which the crash occurs, or try to reason about your code's correctness. I recommend you run the source code analyzer (on the Product menu in Xcode) if you haven't done that already, and try running with the Zombies tool in Instruments.

            • Re: crash report _NSThreadPerformPerform
              ashort Level 1 Level 1 (0 points)

              I can't examine the iPad CPU registers unless I recreate the crash myself in the debugger.  As I have been unable to reproduce the crash, it's sort of hopeless for me and I have no idea what the conditions are at crash time.  The source code analyzer returns 0 issues.  Running with Zombies enabled is only useful if I can re-create the crash, which I cannot.

               

              It's too bad the crash report didn't use the CPU registers to tell me at least the name of the selector, that would give me a huge head start. But obviously if that were possible it would have been done already. I don't know enough about precisely what happens in a crash to know why that's not the case.  Or is this because it's not in code I wrote explicitly. Meaning, if it were in code I wrote explicitly, the crash report would have included the name of the selector?

                • Re: crash report _NSThreadPerformPerform
                  QuinceyMorris Level 7 Level 7 (3,285 points)

                  Yes, I know it's discouraging, but sometimes you have to look for the problem even when you don't know what it is. Have you worked through the information in:

                   

                  developer.apple.com/library/content/technotes/tn2151/_index.html

                   

                  >> Running with Zombies enabled is only useful if I can re-create the crash

                   

                  Not necessarily. If you have a memory management problem, it's entirely possible to go on referring to a released object, if there's nothing that causes the memory to be re-used. Running with zombies can expose this kind of problem much earlier and much more reliably.

                   

                  >> the crash report would have included the name of the selector?

                   

                  Sometimes there's an exception message that gives more information, but a crash in objc_msgSend tends to be cryptic.

                  • Re: crash report _NSThreadPerformPerform
                    eskimo Apple Staff Apple Staff (6,685 points)

                    I can't examine the iPad CPU registers unless I recreate the crash myself in the debugger.

                    The CPU registers are included in the crash report, in the Thread State section.

                    One thing I find instructive when debugging wacky problems like this is to create a dummy app that reproduces the problem.  I can then experiment in the dummy app and, once I know what I’m doing, apply those results to the crash in the real app.

                    For example, this code produces a crash that’s very like the one you’ve reported:

                    @interface Hack : NSObject
                    
                    - (void)varnishWaffles:(id)sender;
                    
                    @end
                    
                    @implementation Hack
                    
                    - (void)varnishWaffles:(id)sender {
                        NSLog(@"varnish request from %@", sender);
                    }
                    
                    @end
                    
                    Hack * h = [[Hack alloc] init];
                    [h performSelector:@selector(varnishWaffles:) withObject:self afterDelay:0.1];
                    [h release];
                    [h release];
                    

                    When I run this in the debugger, I see that x1 contains the selector:

                    (lldb) p (char *)$x1
                    (char *) $0 = 0x00000001000b3215 "varnishWaffles:"
                    

                    Now let’s look at that in a crash log.  The crashing thread’s backtrace is as you’d expect:

                    Thread 0 name:  Dispatch queue: com.apple.main-thread
                    Thread 0 Crashed:
                    0  … objc_msgSend + 16
                    1  … __NSFireDelayedPerform + 428
                    2  … __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 28
                    3  … __CFRunLoopDoTimer + 872
                    4  … __CFRunLoopDoTimers + 244
                    5  … __CFRunLoopRun + 1572
                    6  … CFRunLoopRunSpecific + 444
                    7  … GSEventRunModal + 180
                    8  … -[UIApplication _run] + 684
                    9  … UIApplicationMain + 208
                    10 … main (main.m:15)
                    11 … start + 4
                    

                    So, let’s take a look at x1.

                    Thread 0 crashed with ARM Thread State (64-bit):
                        … x1: 0x0000000100027215 …
                        …
                    

                    We can find the image containing that selector by running that address through the Binary Images section:

                    Binary Images:
                    0x100020000 - 0x100027fff …/CrashTest
                    …
                    

                    Alas, things get a bit complex here.  You need to calculate the slide associated with the image so that you can understand the address you got.  In this case the slide is 0x20000, because a main executable image is linked to load at 0x100000000 but, as indicated by the Binary Images entry, was actually loaded at 0x100020000.  So, the slide is 0x20000, which is the latter subtract the former.

                    Armed with that you can dump you selector:

                    $ lldb --arch arm64 build/Debug-iphoneos/CrashTest.app/CrashTest
                    (lldb) target create --arch=arm64 "build/Debug-iphoneos/CrashTest.app/CrashTest"
                    Current executable set to 'build/Debug-iphoneos/CrashTest.app/CrashTest' (arm64).
                    (lldb) p (char *)(0x0000000100027215 - 0x20000)
                    (char *) $1 = 0x0000000100007215 "varnishWaffles:"
                    

                    Fun times!

                    Share and Enjoy

                    Quinn “The Eskimo!”
                    Apple Developer Relations, Developer Technical Support, Core OS/Hardware
                    let myEmail = "eskimo" + "1" + "@apple.com"

                      • Re: crash report _NSThreadPerformPerform
                        ashort Level 1 Level 1 (0 points)

                        Thank you for your fascinating answer!  However, I don't see a Thread State section.  In the Organizer, I see an end-user crash, and I click Open in Project..., then my project opens and I see this:

                         

                        Thread 0

                        0     objc_msgSend ()

                        1     __NSThreadPerformPerform

                        2     __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__

                        3     __CFRunLoopDoSources0

                        4     __CFRunLoopRun

                        5     CFRunLoopRunSpecific

                        6     GSEventRunModal

                        7     -[UIApplication _run]

                        8     UIApplicationMain

                        9     main

                        10   start

                         

                        Line 0 is highlighted.  Clicking on any of the lines does nothing.  Where would I see the Thread State?  I don't see a Binary Images section either.

                         

                        Also, I created a sample app with your sample crashing code, and when I get the crash, I don't see anything called Thread State or Binary Images.  If I click on the line containing objc_msgSend, I get 50 lines of assembler code, here are the first 7 lines:

                         

                        libobjc.A.dylib`objc_msgSend:
                            0x10a7a5ac0 <+0>:   testq  %rdi, %rdi
                            0x10a7a5ac3 <+3>:   jle    0x10a7a5b10               ; <+80>
                            0x10a7a5ac5 <+5>:   movq   (%rdi), %r10
                            0x10a7a5ac8 <+8>:   movq   %rsi, %r11
                        ->  0x10a7a5acb <+11>:  andl   0x18(%r10), %r11d
                            0x10a7a5acf <+15>:  shlq   $0x4, %r11
                        
                        
                        

                         

                        Note that in my end-user crash report, clicking on any of the lines does nothing.  But in both cases, I don't see a Thread State or Binary Images section anywhere. I must be missing something.

                          • Re: crash report _NSThreadPerformPerform
                            eskimo Apple Staff Apple Staff (6,685 points)

                            In the Organizer, I see an end-user crash …

                            You need to find the underlying text-based crash report file (typically with the .crash extension).  Unfortunately I can’t give you step-by-step advice here because I don’t have any crashes in my Organizer window (these only show up if you distribute apps via the store, and that’s not something I can do).  However, it seems that this is possible.  Check out the Viewing and Finding Crash Reports section of the App Distribution Guide.

                            Also, I created a sample app with your sample crashing code, and when I get the crash, I don't see anything called Thread State or Binary Images.

                            That’s because you’re running the app in the debugger, which catches the crash as it occurs.  You can get much the same information from the debugger (via commands like register and image, which is an alias for target modules) but that’s not really relevant here.  Instead you should run the app outside of the debugger and let it crash there.  The system will then generate a crash log which you can see via the Devices window in Xcode.

                            Share and Enjoy

                            Quinn “The Eskimo!”
                            Apple Developer Relations, Developer Technical Support, Core OS/Hardware
                            let myEmail = "eskimo" + "1" + "@apple.com"

                              • Re: crash report _NSThreadPerformPerform
                                ashort Level 1 Level 1 (0 points)

                                ahhh, I see.  To others reading this, I found the underlying text based .crash file by doing this:

                                 

                                (1) from the XCode Organizer, Ctrl-click on the crash report and select "Show in Finder"

                                (2) This takes you to a package file with a .xccrashpoint file extension

                                (3) Ctrl-click on the file and select "Show package contents"

                                (4) drill down through the folders and you will see a file with a .crash file extension, which you can view in TextEdit or any text editor

                                 

                                It indeed shows the ARM Thread State, as well as the Binary Images.

                                 

                                In my little test app based on your crashing test code, I was able to successfully reproduce printing out the string pointed to by the x1 register.  In my case the x1 register in the thread state showed this

                                 

                                x1: 0x0000000100012d25

                                 

                                and the Binary Image of the executable shows this:

                                 

                                Binary Images:

                                0x10000c000 - 0x100013fff .../testCrashReport

                                 

                                So the offset is presumably 0x10000c000 - 0x100000000 = 0xc000.  But when I print out the contents, it's still 8 bytes off for some strange reason.  In other words, this happens:

                                 

                                (lldb) p (char *)(0x0000000100012d25 - 0xc000)

                                (char *) $0 = 0x0000000100006d25 "affles:"

                                 

                                but when make the offset 8 bytes bigger, I get the correct result:

                                 

                                (lldb) p (char *)(0x0000000100012d25 - 0xc008)

                                (char *) $0 = 0x0000000100006d1d "varnishWaffles:"

                                 

                                Success on the test app, although I must be misunderstanding how you calculate the offset.

                                 

                                As an aside, I also tried printing out the SEL receiver object, which is supposedly stored in register x0 at the time of the crash.  The x0 register shows an address of 0x00000001700183c0, and so I did this:

                                 

                                (lldb) p (char *)(0x00000001700183c0 - 0xc000)

                                (char *) $0 = 0x000000017000c3c0 <no value available>

                                 

                                As you can see, I get <no value available>.  Not sure why...I suppose it's not of type (char *).  I really want the class name of the receiver.

                                 

                                =========================

                                Moving on, I tried to print the selector name at the x1 register with my shipping app using the Archived .app file and the user crash file.  According to the thread state of the user crash file, the x1 register at the time of the crash contains this address:

                                 

                                0x000000018c6f8629

                                 

                                Scanning the Binary Images, this address is not found in my application, but rather in UIKit:

                                 

                                0x18bbba000 - 0x18c947fff UIKit arm64  <439dc80bfac033ed983e5bb8c416c452> /System/Library/Frameworks/UIKit.framework/UIKit

                                 

                                Well now what? This is in UIKit.  Is this a dead end for me, or is there still hope to get the selector?  How would I calculate the offset? And where would I find the binary image of UIKit? I think I found the iOS UIKit.framework on my Mac at:

                                 

                                /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks

                                 

                                but that doesn't seem to contain what I need...

                                  • Re: crash report _NSThreadPerformPerform
                                    eskimo Apple Staff Apple Staff (6,685 points)

                                    In my little test app based on your crashing test code, I was able to successfully reproduce printing out the string pointed to by the x1 register.

                                    Cool.  To quote Obi-Wan, “You’ve taken your first step into a larger world.”

                                    As an aside, I also tried printing out the SEL receiver object, which is supposedly stored in register x0 at the time of the crash.

                                    That won’t work, because the receiving object is allocated from the heap and thus is found at an (essentially) random place on each run of the app.

                                    Well now what? This is in UIKit.

                                    Right, but that shouldn’t stop you (-:  To start, you can explore this by modifying your test app to use a UIKit selector.  For example:

                                    @interface Hack : NSObject 
                                    
                                    - (void)applicationWillTerminate:(id)sender; 
                                    
                                    @end 
                                    
                                    @implementation Hack 
                                    
                                    - (void)applicationWillTerminate:(id)sender { 
                                        NSLog(@"well terminate request from %@", sender); 
                                    } 
                                    
                                    @end 
                                    
                                    Hack * h = [[Hack alloc] init]; 
                                    [h performSelector:@selector(applicationWillTerminate:) withObject:self afterDelay:0.1]; 
                                    [h release]; 
                                    [h release];
                                    

                                    A crash log from that reveals a new address for x1:

                                    Thread 0 crashed with ARM Thread State (64-bit):
                                        … x1: 0x000000019613716d …
                                    

                                    and the load address of UIKit:

                                    0x1955f5000 - 0x196382fff UIKit arm64  <7ef942f43c3e3e4aa6cec127b68ecbab> /System/Library/Frameworks/UIKit.framework/UIKit
                                    

                                    The trick here is to run the app (well, any app that uses UIKit) on the same class of device with the same OS release.  At that point you can stop in the debugger and do an image list command to see all your Mach-O images:

                                    (lldb) image list
                                    …
                                    [  6] 7EF942F4-3C3E-3E4A-A6CE-C127B68ECBAB 0x0000000188b29000 /Users/quinn/Library/Developer/Xcode/iOS DeviceSupport/10.1.1 (14B100)/Symbols/System/Library/Frameworks/UIKit.framework/UIKit
                                    …
                                    

                                    There’s two things to note in the UIKit entry:

                                    • Make sure that the UUIDs match up.  The crash log shows 7ef942f43c3e3e4aa6cec127b68ecbab and LLDB shows 7EF942F4-3C3E-3E4A-A6CE-C127B68ECBAB, which are the same (modulo formatting).  If they’re different, you’re either on a different OS releases or a different class of device.

                                    • LLDB shows the base address for the framework as 0x0000000188b29000, which is different from the crash report due to ASLR.

                                    So, now you calculate the offset of x1 from the crash report base address:

                                    (lldb) p/x 0x000000019613716d-0x1955f5000
                                    (long) $0 = 0x0000000000b4216d
                                    

                                    and add that to your new base address:

                                    (lldb) p (char *)(0x0000000188b29000 + 0x0000000000b4216d)
                                    (char *) $0 = 0x000000018966b16d "applicationWillTerminate:"
                                    

                                    Et voilà!

                                    Share and Enjoy

                                    Quinn “The Eskimo!”
                                    Apple Developer Relations, Developer Technical Support, Core OS/Hardware
                                    let myEmail = "eskimo" + "1" + "@apple.com"

                                      • Re: crash report _NSThreadPerformPerform
                                        ashort Level 1 Level 1 (0 points)

                                        Thank you.  I was able to successfully reproduce printing the UIKit "applicationWillTerminate:" selector in my modified test app.

                                         

                                        My test app crash report shows the x1 register had an address of:

                                        0x0000000190bef16d
                                        

                                         

                                        The test app crash report also shows the load address of UIKit:

                                        0x1900ad000 - 0x190e3afff UIKit arm64  <7ef942f43c3e3e4aa6cec127b68ecbab> /System/Library/Frameworks/UIKit.framework/UIKit
                                        

                                         

                                        In the debugger, the image list shows the base address of UIKit as:

                                        [  6] 7EF942F4-3C3E-3E4A-A6CE-C127B68ECBAB 0x00000001900ad000 /Users/andrewshort/Library/Developer/Xcode/iOS DeviceSupport/10.1.1 (14B100)/Symbols/System/Library/Frameworks/UIKit.framework/UIKit
                                        

                                         

                                        Of course the UUIDs match up since this is just a test app that I'm intentionally crashing.  So, now I calculate the offset of x1 from the crash report base address:

                                        (lldb) p/x 0x0000000190bef16d-0x1900ad000
                                        (long) $0 = 0x0000000000b4216d
                                        

                                         

                                        Note that 0x0000000000b4216d is the same value you got!

                                         

                                        and add that to your new base address to print the selector:

                                        (lldb) p (char *)(0x00000001900ad000 + 0x0000000000b4216d)
                                        (char *) $0 = 0x0000000190bef16d "applicationWillTerminate:"
                                        

                                         

                                        So yes, that's really cool!  Now onto my user crash report in a shipping app:

                                         

                                        As you note, to calculate the proper UIKit address/offset requires I calculate some things while in the debugger attached to a device/iOS config that is the same as the crash report.  Alas, the user crash report that I'm getting in XCode organizer is from an iPad mini 2 running 10.0.2.  As I don't have that device/OS configuration, I have no way of determining the proper address.  Or is that really true?  Couldn't someone else who happens to have that device/iOS config just tell me the proper address by printing the image list from their debugger attached to their device (while running any app that uses UIKit)?  They would not even need my app, right - just any sort of test app that uses UIKit, like the test app we created that intentionally crashes with the UIKit selector applicationWillTerminate.  And if that's true, then wouldn't it be nice if this were published somewhere in a big table, so I could just look up the offset?  In other words, a table that says if you're running an iPad mini 2 running iOS 10.0.2, then UIKit has a load address of blabla.

                                          • Re: crash report _NSThreadPerformPerform
                                            eskimo Apple Staff Apple Staff (6,685 points)

                                            In other words, a table that says if you're running an iPad mini 2 running iOS 10.0.2, then UIKit has a load address of blabla.

                                            It’s not the load address you need.  The load address will be different on each device, even the same device running the same OS, due to ASLR.

                                            What you need is a copy of the UIKit image itself, so you can load it up at an address of your choosing and then dump the memory at that offset; this is basically the same as what I did with the CrashTest app in the last part of my 15 Nov post.

                                            Alas, I don’t know of any supported way to get such an image.  You could probably do it by locating the appropriate .ipsw and unpacking things from there, but such endeavours are definitely not supported (and definitely not an appropriate topic of conversation for DevForums )-:

                                            Alternatively, you could build a test app that, when run on a user’s device:

                                            1. verifies that UIKit’s UUID was correct

                                            2. works out UIKit’s load address

                                            3. applies your offset to that

                                            4. reads the selector string from memory

                                            At that point you just need to find someone running the right device (-:

                                            IMPORTANT You don’t need exactly the right device.  iOS devices group into families, so any device from the same family would work.  A good way to see these family groups is to look at the iOS Restore Images for the latest iOS beta on the developer downloads page.  In your specific case, that indicates that the iPad mini 2 uses the same system software as the iPad Air.

                                            If you wanted to do this, you’d need to get up to speed on the APIs in <mach-o/dyld.h> and the declarations in <mach-o/loader.h>.  Fun times!


                                            After poking around with this some more I discovered that the actual selector in x1 in this case is always going to be performSelector:withObject: because that’s how __NSThreadPerformPerform does its thing.  So the actual value of interest is in x2, that is, the ‘selector’ parameter to performSelector:withObject:.  What do you see for that?

                                            Oh, btw, I changed my test project to more accurately reflect the crash you’re seeing.

                                            Hack * h = [[Hack alloc] init];
                                            [h performSelectorOnMainThread:@selector(varnishWaffles:) withObject:nil waitUntilDone:NO]; 
                                            [h release]; 
                                            [h release];
                                            

                                            With this change frame 1 is __NSThreadPerformPerform, whereas with the older code it was __NSFireDelayedPerform, and I just didn’t notice that difference.  The devil really is in the details with this stuff.

                                            Share and Enjoy

                                            Quinn “The Eskimo!”
                                            Apple Developer Relations, Developer Technical Support, Core OS/Hardware
                                            let myEmail = "eskimo" + "1" + "@apple.com"

                                            439dc80bfac033ed983e5bb8c416c452 0x000000018c6f8629-0x18bbba000 0x0000000000b3e629 00000001874a6000 0x0000000187fe4629

                                              • Re: crash report _NSThreadPerformPerform
                                                ashort Level 1 Level 1 (0 points)

                                                ok, thanks.  In the user crash report, the x2 register contains the address

                                                0x000000019ed73664
                                                
                                                
                                                
                                                

                                                 

                                                Scanning the Binary Images, I see that address is within this:

                                                0x19ecc2000 - 0x19ed96fff AVFAudio arm64  <291f828312d038c9aecd48a7069cc790> /System/Library/Frameworks/AVFoundation.framework/Frameworks/AVFAudio.framework/AVFAudio
                                                
                                                
                                                
                                                

                                                 

                                                My app does initialize an AVAudioSession, and my app plays instances of AVAudioPlayer, and my app responds to AVAudioSessionInterruptionNotification to deal with audio interruptions.  Also my app uses AVSpeechSynthesizer a lot.

                                                 

                                                Not clear to me what "AVFAudio" is...

                                                 

                                                I recently made changes in my app to how I handle audio interruptions (in addition to many other unrelated changes), so this gives me a place to start looking!

                                                 

                                                I have an iPad Air 2 running iOS iOS 10.1.1, and the crash report was on an iPad mini 2 running iOS 10.0.2, so I'm not sure I can get the selector.

                                                 

                                                And for reference, here is the crash report:

                                                 

                                                Incident Identifier: 90066498-A0D1-41D7-8A2C-6885C7E6B28D
                                                CrashReporter Key:   f1802400ddac5cb6a51dd67f30403451bfd2b89e
                                                Hardware Model:      iPad4,4
                                                Process:             Jungle Time [615]
                                                Path:                /private/var/containers/Bundle/Application/DF4A588C-4AD1-4F83-889C-FDD480E05F92/Jungle Time.app/Jungle Time
                                                Identifier:          com.shortiphoneapps.Jungle-Time.ipad
                                                Version:             1.0 (7.67)
                                                Code Type:           ARM-64 (Native)
                                                Role:                Foreground
                                                Parent Process:      launchd [1]
                                                Coalition:           com.shortiphoneapps.Jungle-Time.ipad [471]
                                                
                                                
                                                
                                                
                                                Date/Time:           2016-11-08 16:51:34.5457 -0600
                                                Launch Time:         2016-11-08 08:19:02.3861 -0600
                                                OS Version:          iPhone OS 10.0.2 (14A456)
                                                Report Version:      104
                                                
                                                
                                                Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
                                                Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000687b2beb8
                                                Termination Signal: Segmentation fault: 11
                                                Termination Reason: Namespace SIGNAL, Code 0xb
                                                Terminating Process: exc handler [0]
                                                Triggered by Thread:  0
                                                
                                                
                                                Thread 0 name:
                                                Thread 0 Crashed:
                                                0   libobjc.A.dylib               0x00000001847d2f30 objc_msgSend + 16
                                                1   Foundation                     0x000000018686e6ec __NSThreadPerformPerform + 340 (NSThread.m:1247)
                                                2   CoreFoundation                 0x0000000185d36278 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24 (CFRunLoop.c:1943)
                                                3   CoreFoundation                 0x0000000185d35bc0 __CFRunLoopDoSources0 + 524 (CFRunLoop.c:1989)
                                                4   CoreFoundation                 0x0000000185d337c0 __CFRunLoopRun + 804 (CFRunLoop.c:2821)
                                                5   CoreFoundation                 0x0000000185c62048 CFRunLoopRunSpecific + 444 (CFRunLoop.c:3113)
                                                6   GraphicsServices               0x00000001876e5198 GSEventRunModal + 180 (GSEvent.c:2245)
                                                7   UIKit                         0x000000018bc35628 -[UIApplication _run] + 684 (UIApplication.m:2649)
                                                8   UIKit                         0x000000018bc30360 UIApplicationMain + 208 (UIApplication.m:4091)
                                                9   Jungle Time                   0x00000001000f9768 main + 188 (main.m:16)
                                                10  libdyld.dylib                 0x0000000184c445b8 start + 4
                                                
                                                
                                                Thread 1 name:
                                                Thread 1:
                                                0   libsystem_kernel.dylib         0x0000000184d3816c mach_msg_trap + 8
                                                1   libsystem_kernel.dylib         0x0000000184d37fdc mach_msg + 72 (mach_msg.c:103)
                                                2   CoreFoundation                 0x0000000185d35cec __CFRunLoopServiceMachPort + 192 (CFRunLoop.c:2527)
                                                3   CoreFoundation                 0x0000000185d33908 __CFRunLoopRun + 1132 (CFRunLoop.c:2870)
                                                4   CoreFoundation                 0x0000000185c62048 CFRunLoopRunSpecific + 444 (CFRunLoop.c:3113)
                                                5   Foundation                     0x0000000186770b1c -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 304 (NSRunLoop.m:367)
                                                6   Foundation                     0x000000018679160c -[NSRunLoop(NSRunLoop) runUntilDate:] + 96 (NSRunLoop.m:411)
                                                7   UIKit                         0x000000018c5aac7c -[UIEventFetcher threadMain] + 136 (UIEventFetcher.m:279)
                                                8   Foundation                     0x000000018686e50c __NSThread__start__ + 1024 (NSThread.m:1163)
                                                9   libsystem_pthread.dylib       0x0000000184e1b860 _pthread_body + 240 (pthread.c:697)
                                                10  libsystem_pthread.dylib       0x0000000184e1b770 _pthread_start + 284 (pthread.c:744)
                                                11  libsystem_pthread.dylib       0x0000000184e18dbc thread_start + 4
                                                
                                                
                                                Thread 2 name:
                                                Thread 2:
                                                0   libsystem_kernel.dylib         0x0000000184d3816c mach_msg_trap + 8
                                                1   libsystem_kernel.dylib         0x0000000184d37fdc mach_msg + 72 (mach_msg.c:103)
                                                2   CoreFoundation                 0x0000000185d35cec __CFRunLoopServiceMachPort + 192 (CFRunLoop.c:2527)
                                                3   CoreFoundation                 0x0000000185d33908 __CFRunLoopRun + 1132 (CFRunLoop.c:2870)
                                                4   CoreFoundation                 0x0000000185c62048 CFRunLoopRunSpecific + 444 (CFRunLoop.c:3113)
                                                5   AVFAudio                       0x000000019ed3afe8 GenericRunLoopThread::Entry(void*) + 164 (GenericRunLoopThread.h:106)
                                                6   AVFAudio                       0x000000019ed60f14 CAPThread::Entry(CAPThread*) + 84
                                                7   libsystem_pthread.dylib       0x0000000184e1b860 _pthread_body + 240 (pthread.c:697)
                                                8   libsystem_pthread.dylib       0x0000000184e1b770 _pthread_start + 284 (pthread.c:744)
                                                9   libsystem_pthread.dylib       0x0000000184e18dbc thread_start + 4
                                                
                                                
                                                Thread 3 name:
                                                Thread 3:
                                                0   libsystem_kernel.dylib         0x0000000184d3816c mach_msg_trap + 8
                                                1   libsystem_kernel.dylib         0x0000000184d37fdc mach_msg + 72 (mach_msg.c:103)
                                                2   CoreFoundation                 0x0000000185d35cec __CFRunLoopServiceMachPort + 192 (CFRunLoop.c:2527)
                                                3   CoreFoundation                 0x0000000185d33908 __CFRunLoopRun + 1132 (CFRunLoop.c:2870)
                                                4   CoreFoundation                 0x0000000185c62048 CFRunLoopRunSpecific + 444 (CFRunLoop.c:3113)
                                                5   Foundation                     0x0000000186770b1c -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 304 (NSRunLoop.m:367)
                                                6   libAXSpeechManager.dylib       0x0000000190f0deb0 -[AXSpeechThread main] + 232 (AXSpeechThread.m:33)
                                                7   Foundation                     0x000000018686e50c __NSThread__start__ + 1024 (NSThread.m:1163)
                                                8   libsystem_pthread.dylib       0x0000000184e1b860 _pthread_body + 240 (pthread.c:697)
                                                9   libsystem_pthread.dylib       0x0000000184e1b770 _pthread_start + 284 (pthread.c:744)
                                                10  libsystem_pthread.dylib       0x0000000184e18dbc thread_start + 4
                                                
                                                
                                                Thread 4 name:
                                                Thread 4:
                                                0   libsystem_kernel.dylib         0x0000000184d3816c mach_msg_trap + 8
                                                1   libsystem_kernel.dylib         0x0000000184d37fdc mach_msg + 72 (mach_msg.c:103)
                                                2   CoreFoundation                 0x0000000185d35cec __CFRunLoopServiceMachPort + 192 (CFRunLoop.c:2527)
                                                3   CoreFoundation                 0x0000000185d33908 __CFRunLoopRun + 1132 (CFRunLoop.c:2870)
                                                4   CoreFoundation                 0x0000000185c62048 CFRunLoopRunSpecific + 444 (CFRunLoop.c:3113)
                                                5   AudioToolbox                   0x0000000188cdafd0 GenericRunLoopThread::Entry(void*) + 164 (GenericRunLoopThread.h:106)
                                                6   AudioToolbox                   0x0000000188eb0590 CAPThread::Entry(CAPThread*) + 84
                                                7   libsystem_pthread.dylib       0x0000000184e1b860 _pthread_body + 240 (pthread.c:697)
                                                8   libsystem_pthread.dylib       0x0000000184e1b770 _pthread_start + 284 (pthread.c:744)
                                                9   libsystem_pthread.dylib       0x0000000184e18dbc thread_start + 4
                                                
                                                
                                                Thread 5 name:
                                                Thread 5:
                                                0   libsystem_kernel.dylib         0x0000000184d3816c mach_msg_trap + 8
                                                1   libsystem_kernel.dylib         0x0000000184d37fdc mach_msg + 72 (mach_msg.c:103)
                                                2   CoreFoundation                 0x0000000185d35cec __CFRunLoopServiceMachPort + 192 (CFRunLoop.c:2527)
                                                3   CoreFoundation                 0x0000000185d33908 __CFRunLoopRun + 1132 (CFRunLoop.c:2870)
                                                4   CoreFoundation                 0x0000000185c62048 CFRunLoopRunSpecific + 444 (CFRunLoop.c:3113)
                                                5   Foundation                     0x0000000186770b1c -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 304 (NSRunLoop.m:367)
                                                6   libAXSpeechManager.dylib       0x0000000190f0deb0 -[AXSpeechThread main] + 232 (AXSpeechThread.m:33)
                                                7   Foundation                     0x000000018686e50c __NSThread__start__ + 1024 (NSThread.m:1163)
                                                8   libsystem_pthread.dylib       0x0000000184e1b860 _pthread_body + 240 (pthread.c:697)
                                                9   libsystem_pthread.dylib       0x0000000184e1b770 _pthread_start + 284 (pthread.c:744)
                                                10  libsystem_pthread.dylib       0x0000000184e18dbc thread_start + 4
                                                
                                                
                                                Thread 6:
                                                0   libsystem_kernel.dylib         0x0000000184d3816c mach_msg_trap + 8
                                                1   libsystem_kernel.dylib         0x0000000184d37fdc mach_msg + 72 (mach_msg.c:103)
                                                2   CoreFoundation                 0x0000000185d35cec __CFRunLoopServiceMachPort + 192 (CFRunLoop.c:2527)
                                                3   CoreFoundation                 0x0000000185d33908 __CFRunLoopRun + 1132 (CFRunLoop.c:2870)
                                                4   CoreFoundation                 0x0000000185c62048 CFRunLoopRunSpecific + 444 (CFRunLoop.c:3113)
                                                5   TTSSpeechBundle               0x0000000103a9a59c 0x103a8c000 + 58780
                                                6   libsystem_pthread.dylib       0x0000000184e1b860 _pthread_body + 240 (pthread.c:697)
                                                7   libsystem_pthread.dylib       0x0000000184e1b770 _pthread_start + 284 (pthread.c:744)
                                                8   libsystem_pthread.dylib       0x0000000184e18dbc thread_start + 4
                                                
                                                
                                                Thread 7:
                                                0   libsystem_pthread.dylib       0x0000000184e18db0 start_wqthread + 0
                                                
                                                
                                                Thread 8:
                                                0   libsystem_kernel.dylib         0x0000000184d56a88 __workq_kernreturn + 8
                                                1   libsystem_pthread.dylib       0x0000000184e1936c _pthread_wqthread + 1452 (pthread.c:2205)
                                                2   libsystem_pthread.dylib       0x0000000184e18db4 start_wqthread + 4
                                                
                                                
                                                Thread 9:
                                                0   libsystem_pthread.dylib       0x0000000184e18db0 start_wqthread + 0
                                                
                                                
                                                Thread 10:
                                                0   libsystem_pthread.dylib       0x0000000184e18db0 start_wqthread + 0
                                                
                                                
                                                Thread 0 crashed with ARM Thread State (64-bit):
                                                    x0: 0x000000017000f3a0   x1: 0x000000018c6f8629   x2: 0x000000019ed73664   x3: 0x00000001aa1aa110
                                                    x4: 0x0000000000000010   x5: 0x0000000000000000   x6: 0x0000000000000000   x7: 0x0000000000000000
                                                    x8: 0x0000000000000018   x9: 0x00000000a1a1a1a1  x10: 0x00000001700a3e18  x11: 0xffffffffffffffff
                                                   x12: 0x0002540000025503  x13: 0xbadde9f687b2bead  x14: 0x0002550000025500  x15: 0x0000000000000000
                                                   x16: 0x0000000687b2bea8  x17: 0x0000000185c62520  x18: 0x0000000000000000  x19: 0x0000000170261540
                                                   x20: 0x00000001a8be3000  x21: 0x00000001a8be3000  x22: 0x000000018c6f86a0  x23: 0x0000000000000001
                                                   x24: 0x00000001a8be3000  x25: 0x0000000174863880  x26: 0x0000000000000000  x27: 0x00000001a8be3000
                                                   x28: 0x00000001001f4090   fp: 0x000000016fd2ec40   lr: 0x000000018686e6ec
                                                    sp: 0x000000016fd2ebc0   pc: 0x00000001847d2f30 cpsr: 0x20000000
                                                
                                                
                                                Binary Images:
                                                0x1000d0000 - 0x100153fff Jungle Time arm64  <99b895649ee83bb0bc3879568a60f70a> /var/containers/Bundle/Application/DF4A588C-4AD1-4F83-889C-FDD480E05F92/Jungle Time.app/Jungle Time
                                                0x100230000 - 0x10025ffff dyld arm64  <fc8715469f7b30228b67a5ae12cadf10> /usr/lib/dyld
                                                0x103904000 - 0x103a1bfff MacinTalk arm64  <214111166a453362b20bb0c87a3aa356> /System/Library/TTSPlugins/MacinTalk.speechbundle/MacinTalk
                                                0x103a8c000 - 0x103d73fff TTSSpeechBundle arm64  <20c85b67e39638fcbc3c09ff20128120> /System/Library/TTSPlugins/TTSSpeechBundle.speechbundle/TTSSpeechBundle
                                                0x18473c000 - 0x18473dfff libSystem.B.dylib arm64  <8788325e11bc31a39b075a3497d26ebd> /usr/lib/libSystem.B.dylib
                                                0x18473e000 - 0x184793fff libc++.1.dylib arm64  <95f6dd603b933208ba95cc2d84613c54> /usr/lib/libc++.1.dylib
                                                0x184794000 - 0x1847b4fff libc++abi.dylib arm64  <286b3adc78d1308eaa0d6f10914b1fa7> /usr/lib/libc++abi.dylib
                                                0x1847b8000 - 0x184b91fff libobjc.A.dylib arm64  <56adf6a5a61b3ef1968bae3dd66e4893> /usr/lib/libobjc.A.dylib
                                                0x184b92000 - 0x184b96fff libcache.dylib arm64  <4073ffab5dee3540b91e3ea1292d4944> /usr/lib/system/libcache.dylib
                                                0x184b97000 - 0x184ba2fff libcommonCrypto.dylib arm64  <cbc60c6bf6843b489a4d4b47bc9caba8> /usr/lib/system/libcommonCrypto.dylib
                                                0x184ba3000 - 0x184ba6fff libcompiler_rt.dylib arm64  <6b7d58fa13473277aae76d339b13a724> /usr/lib/system/libcompiler_rt.dylib
                                                0x184ba7000 - 0x184baefff libcopyfile.dylib arm64  <2130e1083c2b31498e4873b42c01a87c> /usr/lib/system/libcopyfile.dylib
                                                0x184baf000 - 0x184c0ffff libcorecrypto.dylib arm64  <69592d5de33d337baf0746846b8e8b71> /usr/lib/system/libcorecrypto.dylib
                                                0x184c10000 - 0x184c3ffff libdispatch.dylib arm64  <9da4900c6d953655bbfcc6b31c990e9c> /usr/lib/system/libdispatch.dylib
                                                0x184c40000 - 0x184c44fff libdyld.dylib arm64  <b69bc0979de93e7c9cac9d89b284039f> /usr/lib/system/libdyld.dylib
                                                0x184c45000 - 0x184c45fff liblaunch.dylib arm64  <7e180d7e5df13f699dbc6bb79ad46116> /usr/lib/system/liblaunch.dylib
                                                0x184c46000 - 0x184c4bfff libmacho.dylib arm64  <40cb3d5ba75831cdac02a56cab260364> /usr/lib/system/libmacho.dylib
                                                0x184c4c000 - 0x184c4dfff libremovefile.dylib arm64  <58f887789b983f71a5cfd5777958da77> /usr/lib/system/libremovefile.dylib
                                                0x184c4e000 - 0x184c65fff libsystem_asl.dylib arm64  <2ec01cd41fa73c94b3f0ba16aacd3858> /usr/lib/system/libsystem_asl.dylib
                                                0x184c66000 - 0x184c66fff libsystem_blocks.dylib arm64  <e49693e120c33ee580a602e909c83abe> /usr/lib/system/libsystem_blocks.dylib
                                                0x184c67000 - 0x184ce5fff libsystem_c.dylib arm64  <051c0135e5d835979ce0166c05c8f381> /usr/lib/system/libsystem_c.dylib
                                                0x184ce6000 - 0x184ceafff libsystem_configuration.dylib arm64  <c253d3f37bac39bcb755bd85f8c6b7fd> /usr/lib/system/libsystem_configuration.dylib
                                                0x184ceb000 - 0x184cf0fff libsystem_containermanager.dylib arm64  <a845710abeb9350596b19219de14752d> /usr/lib/system/libsystem_containermanager.dylib
                                                0x184cf1000 - 0x184cf2fff libsystem_coreservices.dylib arm64  <e10d8ff725fe3a88a5328b24666b4d34> /usr/lib/system/libsystem_coreservices.dylib
                                                0x184cf3000 - 0x184d0bfff libsystem_coretls.dylib arm64  <23df3c03932932869f59404b025c3153> /usr/lib/system/libsystem_coretls.dylib
                                                0x184d0c000 - 0x184d12fff libsystem_dnssd.dylib arm64  <441464753206379bafd15b113907f608> /usr/lib/system/libsystem_dnssd.dylib
                                                0x184d13000 - 0x184d36fff libsystem_info.dylib arm64  <2e66f9d1ee0837ff895155dd12b2c956> /usr/lib/system/libsystem_info.dylib
                                                0x184d37000 - 0x184d5bfff libsystem_kernel.dylib arm64  <04e6664af08030e1ad7d9f2249e47e18> /usr/lib/system/libsystem_kernel.dylib
                                                0x184d5c000 - 0x184d88fff libsystem_m.dylib arm64  <786e37b9fc8431f5bfb79550eed0c3ce> /usr/lib/system/libsystem_m.dylib
                                                0x184d89000 - 0x184da4fff libsystem_malloc.dylib arm64  <6eef211324863711a1d99713c51512cb> /usr/lib/system/libsystem_malloc.dylib
                                                0x184da5000 - 0x184dfbfff libsystem_network.dylib arm64  <84d56a9d88ba32f9830d884a7aa14c3b> /usr/lib/system/libsystem_network.dylib
                                                0x184dfc000 - 0x184e05fff libsystem_networkextension.dylib arm64  <a8d963518d643327ac1991dbf8f15f91> /usr/lib/system/libsystem_networkextension.dylib
                                                0x184e06000 - 0x184e10fff libsystem_notify.dylib arm64  <abb481f869e83db39d0ee3e61a9c0554> /usr/lib/system/libsystem_notify.dylib
                                                0x184e11000 - 0x184e17fff libsystem_platform.dylib arm64  <6735814899ed328499ce8a0f59ff49b6> /usr/lib/system/libsystem_platform.dylib
                                                0x184e18000 - 0x184e21fff libsystem_pthread.dylib arm64  <be17c5de3ff83a8695913479341c34ec> /usr/lib/system/libsystem_pthread.dylib
                                                0x184e22000 - 0x184e25fff libsystem_sandbox.dylib arm64  <f269179060d53feaaac004e7c838b44d> /usr/lib/system/libsystem_sandbox.dylib
                                                0x184e26000 - 0x184e2dfff libsystem_symptoms.dylib arm64  <2e6f3a69a33a3a309ca86ef8358c2b55> /usr/lib/system/libsystem_symptoms.dylib
                                                0x184e2e000 - 0x184e4ffff libsystem_trace.dylib arm64  <3ed1ebdc2ed435dc87973ddbf563744b> /usr/lib/system/libsystem_trace.dylib
                                                0x184e50000 - 0x184e55fff libunwind.dylib arm64  <8e51acc655103210bcd8c557e4f103ab> /usr/lib/system/libunwind.dylib
                                                0x184e56000 - 0x184e56fff libvminterpose.dylib arm64  <abee403ad3fe3b428af3d4ed901a2dfc> /usr/lib/system/libvminterpose.dylib
                                                0x184e57000 - 0x184e7dfff libxpc.dylib arm64  <9bbf09cd8cfd3f94bae40fac797416e0> /usr/lib/system/libxpc.dylib
                                                0x184e7e000 - 0x185098fff libicucore.A.dylib arm64  <49bff0b83e023804af2b53d77d1f6cb4> /usr/lib/libicucore.A.dylib
                                                0x185099000 - 0x1850a9fff libz.1.dylib arm64  <5e67d9e80348304187cd8bf557849015> /usr/lib/libz.1.dylib
                                                0x185c59000 - 0x185fdcfff CoreFoundation arm64  <c4824900d70e3fd5b01dbb079b63eae1> /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
                                                0x185fdd000 - 0x185fedfff libbsm.0.dylib arm64  <f3a3eb26182839e0ac4646d0e2f9e9c4> /usr/lib/libbsm.0.dylib
                                                0x185fee000 - 0x185feefff libenergytrace.dylib arm64  <2cfdece2a96330968c249f7d9e7811ad> /usr/lib/libenergytrace.dylib
                                                0x185fef000 - 0x186069fff IOKit arm64  <27c8e5eb76843818abd4a0b0d5dfccc3> /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
                                                0x18606a000 - 0x18608afff libMobileGestalt.dylib arm64  <f8456dbddfbb35d29491c29b43860e6f> /usr/lib/libMobileGestalt.dylib
                                                0x18608b000 - 0x186175fff libxml2.2.dylib arm64  <edc3ce1ed39b39fd9c3c535d9e542967> /usr/lib/libxml2.2.dylib
                                                0x186176000 - 0x186202fff Security arm64  <624164bf18ba32c8a7f28b5031ef6aa5> /System/Library/Frameworks/Security.framework/Security
                                                0x186203000 - 0x18626dfff SystemConfiguration arm64  <486dd4e417a83cc6a09e0b7de9319356> /System/Library/Frameworks/SystemConfiguration.framework/SystemConfiguration
                                                0x18626e000 - 0x186382fff libsqlite3.dylib arm64  <511215637edc3a0f8d3416fe4536881d> /usr/lib/libsqlite3.dylib
                                                0x186383000 - 0x1866f2fff CFNetwork arm64  <ca09941bfd353bb8b6b679a0f14cad1e> /System/Library/Frameworks/CFNetwork.framework/CFNetwork
                                                0x1866f3000 - 0x186703fff libbz2.1.0.dylib arm64  <b312e3b393893c0db8f793f370dae319> /usr/lib/libbz2.1.0.dylib
                                                0x186704000 - 0x18671cfff liblzma.5.dylib arm64  <3c157ec9f2e83f99a26f322feb7deabc> /usr/lib/liblzma.5.dylib
                                                0x18671d000 - 0x186737fff libCRFSuite.dylib arm64  <af22ff8591193afa81d6d044c5cd7978> /usr/lib/libCRFSuite.dylib
                                                0x186738000 - 0x186761fff libarchive.2.dylib arm64  <1e4278f3e3323387ac5c90f975232c07> /usr/lib/libarchive.2.dylib
                                                0x186762000 - 0x186763fff liblangid.dylib arm64  <c2cccb75f84e3b8a9c2ce6e32e812eb9> /usr/lib/liblangid.dylib
                                                0x186764000 - 0x186a32fff Foundation arm64  <a6ad10553017396ebb4eba2a4ad331d8> /System/Library/Frameworks/Foundation.framework/Foundation
                                                0x186a33000 - 0x186adffff libBLAS.dylib arm64  <499c291219e730d79cf409daee75db9d> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libBLAS.dylib
                                                0x186ae0000 - 0x186e22fff libLAPACK.dylib arm64  <f07da3926d4a3fb0bfcbe3b3b026b54f> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libLAPACK.dylib
                                                0x186e23000 - 0x1870c5fff vImage arm64  <c3827fd6a2763bb9bf22e65906eb3cfc> /System/Library/Frameworks/Accelerate.framework/Frameworks/vImage.framework/vImage
                                                0x1870c6000 - 0x1870e8fff libvMisc.dylib arm64  <bd641d6b451430a8a26dde179a9bfc4a> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libvMisc.dylib
                                                0x1870e9000 - 0x1870fdfff libLinearAlgebra.dylib arm64  <e9a40ae4066c3d3ebab7aec269c6f69e> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libLinearAlgebra.dylib
                                                0x1870fe000 - 0x18710ffff libSparseBLAS.dylib arm64  <66e35a109b573fe98941afd7e9921214> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libSparseBLAS.dylib
                                                0x187110000 - 0x187188fff libvDSP.dylib arm64  <c2ce3490f1b633119d556081ffd0caa0> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libvDSP.dylib
                                                0x187189000 - 0x187189fff vecLib arm64  <c07ed4a995bd35a89bea45c4fd101553> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/vecLib
                                                0x18718a000 - 0x18718afff Accelerate arm64  <5057f428ad8539a9b13b2a607bc7839f> /System/Library/Frameworks/Accelerate.framework/Accelerate
                                                0x18718b000 - 0x1876d8fff CoreGraphics arm64  <4a137515f15e30a495edf7ec114755e0> /System/Library/Frameworks/CoreGraphics.framework/CoreGraphics
                                                0x1876d9000 - 0x1876edfff GraphicsServices arm64  <1e0ed9315f4830088aa2086205f45050> /System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices
                                                0x1876ee000 - 0x187739fff AppSupport arm64  <1fd5606d67de38b484c8e09e0783b4af> /System/Library/PrivateFrameworks/AppSupport.framework/AppSupport
                                                0x18773a000 - 0x18785afff MobileCoreServices arm64  <37baec08da073e729066bded8c9b53da> /System/Library/Frameworks/MobileCoreServices.framework/MobileCoreServices
                                                0x18785b000 - 0x1878b1fff BaseBoard arm64  <160dad81a8de3c5cb46f17c3d4eb7b87> /System/Library/PrivateFrameworks/BaseBoard.framework/BaseBoard
                                                0x1878b2000 - 0x1878bdfff AssertionServices arm64  <3fac49b1df4c373184edb6af5d3a09dd> /System/Library/PrivateFrameworks/AssertionServices.framework/AssertionServices
                                                0x1878be000 - 0x1878eafff BackBoardServices arm64  <b531352894cd36bbbb6d0b9d503566a7> /System/Library/PrivateFrameworks/BackBoardServices.framework/BackBoardServices
                                                0x1878ef000 - 0x18793efff FrontBoardServices arm64  <af1172067ff2304d9d3c8a2f92f04255> /System/Library/PrivateFrameworks/FrontBoardServices.framework/FrontBoardServices
                                                0x187942000 - 0x187978fff SpringBoardServices arm64  <b575c6c21a493b4a87e2dd05bb8cf02a> /System/Library/PrivateFrameworks/SpringBoardServices.framework/SpringBoardServices
                                                0x187979000 - 0x187990fff MobileKeyBag arm64  <734ebf66412c3aa5ac99334f29ebe620> /System/Library/PrivateFrameworks/MobileKeyBag.framework/MobileKeyBag
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                                                0x1882d9000 - 0x1882defff IOAccelerator arm64  <d7135a13f4753c9eb8b4b79455175d32> /System/Library/PrivateFrameworks/IOAccelerator.framework/IOAccelerator
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                                                0x18f049000 - 0x18f348fff WebKit arm64  <ad83e4097cec393588f3117ff3f7984d> /System/Library/Frameworks/WebKit.framework/WebKit
                                                0x18f349000 - 0x18f38ffff WebBookmarks arm64  <4939623c09453d499744e809ee865345> /System/Library/PrivateFrameworks/WebBookmarks.framework/WebBookmarks
                                                0x18f390000 - 0x18f4d4fff ContactsUI arm64  <d2208cfa296e346c8f20815dd07c32b3> /System/Library/Frameworks/ContactsUI.framework/ContactsUI
                                                0x18f4d5000 - 0x18fb3cfff ModelIO arm64  <fdffc2b14ab53f3fb430496af426cb36> /System/Library/Frameworks/ModelIO.framework/ModelIO
                                                0x18fb44000 - 0x18fbc5fff CoreSymbolication arm64  <1a84d15d8ec835e6ab65c0cfcaf435a2> /System/Library/PrivateFrameworks/CoreSymbolication.framework/CoreSymbolication
                                                0x18fc5f000 - 0x18fc8efff GLKit arm64  <dd0f8559665936fda454a0970b05151f> /System/Library/Frameworks/GLKit.framework/GLKit
                                                0x18fefb000 - 0x18ff39fff Notes arm64  <f5813244a3ff392b825707129b7301de> /System/Library/PrivateFrameworks/Notes.framework/Notes
                                                0x18ff3a000 - 0x190011fff AddressBookUI arm64  <31c0ddcfa58f34a6bf9c60c838908e72> /System/Library/Frameworks/AddressBookUI.framework/AddressBookUI
                                                0x190012000 - 0x1900f0fff CloudKit arm64  <6964b82f3a593988b86b3ab436f2f44f> /System/Library/Frameworks/CloudKit.framework/CloudKit
                                                0x19024a000 - 0x190299fff DataAccess arm64  <12a88c8b110737048d257a5176399176> /System/Library/PrivateFrameworks/DataAccess.framework/DataAccess
                                                0x190d13000 - 0x190d81fff libprotobuf.dylib arm64  <49cefe5f37573881b69ab4c1ca25c417> /usr/lib/libprotobuf.dylib
                                                0x190d82000 - 0x190da5fff ScreenReaderCore arm64  <f3080005bf733731ae94889ef52bf685> /System/Library/PrivateFrameworks/ScreenReaderCore.framework/ScreenReaderCore
                                                0x190e5b000 - 0x190e7afff TextToSpeech arm64  <0ee5b719c20438948d850eb22c78f7b2> /System/Library/PrivateFrameworks/TextToSpeech.framework/TextToSpeech
                                                0x190f04000 - 0x190f06fff libAXSafeCategoryBundle.dylib arm64  <ec2951ef911a356aa26a014ba9149a27> /usr/lib/libAXSafeCategoryBundle.dylib
                                                0x190f07000 - 0x190f10fff libAXSpeechManager.dylib arm64  <3d126e8c35fc3c798044c7899847cfba> /usr/lib/libAXSpeechManager.dylib
                                                0x190f11000 - 0x190fb1fff AccessibilityUtilities arm64  <c0f52d226d9539b4983e038b74f760be> /System/Library/PrivateFrameworks/AccessibilityUtilities.framework/AccessibilityUtilities
                                                0x190fb2000 - 0x1910edfff Message arm64  <641dcb7f3a313859a7d6eb0cb0cd3c51> /System/Library/PrivateFrameworks/Message.framework/Message
                                                0x19119f000 - 0x1911d2fff DataDetectorsCore arm64  <7cf6a2529e2831e488c3708945e314e0> /System/Library/PrivateFrameworks/DataDetectorsCore.framework/DataDetectorsCore
                                                0x1911e1000 - 0x191415fff libAWDSupportFramework.dylib arm64  <88727890305735ba853dc8edbfd663a7> /usr/lib/libAWDSupportFramework.dylib
                                                0x191454000 - 0x191491fff WirelessDiagnostics arm64  <6c0d913bce5b30aeabfb8c9382929a0d> /System/Library/PrivateFrameworks/WirelessDiagnostics.framework/WirelessDiagnostics
                                                0x19159b000 - 0x1915d2fff AXRuntime arm64  <fa516ffcfe8b34a3953eab1d6df126dd> /System/Library/PrivateFrameworks/AXRuntime.framework/AXRuntime
                                                0x19166a000 - 0x191675fff CoreRecents arm64  <7115aa87e7c83d668649a4ebec02fc05> /System/Library/PrivateFrameworks/CoreRecents.framework/CoreRecents
                                                0x191fec000 - 0x191feffff FTClientServices arm64  <8db69557415f3574a29447f850b70e6d> /System/Library/PrivateFrameworks/FTClientServices.framework/FTClientServices
                                                0x1921ea000 - 0x192222fff ContactsAutocomplete arm64  <407f2dcac7a93cbdbe16724bac2ab88b> /System/Library/PrivateFrameworks/ContactsAutocomplete.framework/ContactsAutocomplete
                                                0x192233000 - 0x192310fff MessageUI arm64  <fb2381cf4cc937e09a843ea88a7c6a1e> /System/Library/Frameworks/MessageUI.framework/MessageUI
                                                0x192311000 - 0x192389fff libnetwork.dylib arm64  <0a7b6197b67b32858ab16f65cc8e89bb> /usr/lib/libnetwork.dylib
                                                0x192e43000 - 0x192e75fff Pegasus arm64  <5815a011d91e3b9ca2ac76caa2245b77> /System/Library/PrivateFrameworks/Pegasus.framework/Pegasus
                                                0x1949e2000 - 0x194a18fff OpenAL arm64  <4564bba1105436c997271ee32059627a> /System/Library/Frameworks/OpenAL.framework/OpenAL
                                                0x194b40000 - 0x194b5dfff Jet arm64  <95e8fc5b278833eaa87c1dcb629b6d8a> /System/Library/PrivateFrameworks/Jet.framework/Jet
                                                0x194ca9000 - 0x194e25fff SpriteKit arm64  <edd71bb34a6634b8a7007bdf8b933fa6> /System/Library/Frameworks/SpriteKit.framework/SpriteKit
                                                0x195174000 - 0x1951a4fff WirelessProximity arm64  <7e491a1bcba63ed895899f44e890e3f7> /System/Library/PrivateFrameworks/WirelessProximity.framework/WirelessProximity
                                                0x1960a0000 - 0x1960fcfff CoreBrightness arm64  <45681ca0f8de3889b148b92cd7c379ac> /System/Library/PrivateFrameworks/CoreBrightness.framework/CoreBrightness
                                                0x197902000 - 0x197921fff CoreNLP arm64  <f23128bd305e3e0eb3be0d9b2b575dd1> /System/Library/PrivateFrameworks/CoreNLP.framework/CoreNLP
                                                0x19983e000 - 0x199845fff libMatch.1.dylib arm64  <5698f0d024dd3dbea8fbcbd94d64e8f3> /usr/lib/libMatch.1.dylib
                                                0x199905000 - 0x19990bfff AXSpeechImplementation arm64  <12bc0c98d8c830f08719ad0bf105ea90> /System/Library/AccessibilityBundles/AXSpeechImplementation.bundle/AXSpeechImplementation
                                                0x199f03000 - 0x199f17fff libCGInterfaces.dylib arm64  <6197c0f084b532d9ad7df20efbf15f09> /System/Library/Frameworks/Accelerate.framework/Frameworks/vImage.framework/Libraries/libCGInterfaces.dylib
                                                0x199f18000 - 0x19a18efff AudioCodecs arm64  <f448cadf08d43882a76f583a2b694097> /System/Library/Frameworks/AudioToolbox.framework/AudioCodecs
                                                0x19addb000 - 0x19ade9fff AppleFSCompression arm64  <d390dfb23092338c9452195e007afcb0> /System/Library/PrivateFrameworks/AppleFSCompression.framework/AppleFSCompression
                                                0x19adea000 - 0x19adf5fff AppleIDAuthSupport arm64  <01a507f1fe2030aab5f90d0c7c664961> /System/Library/PrivateFrameworks/AppleIDAuthSupport.framework/AppleIDAuthSupport
                                                0x19bac3000 - 0x19bae9fff CoreServicesInternal arm64  <ac0a1a1093eb359a96033c5f36f69b21> /System/Library/PrivateFrameworks/CoreServicesInternal.framework/CoreServicesInternal
                                                0x19c168000 - 0x19c174fff libGSFontCache.dylib arm64  <62002ad71b7a323a9d385a43dde68a66> /System/Library/PrivateFrameworks/FontServices.framework/libGSFontCache.dylib
                                                0x19c175000 - 0x19c1a6fff libTrueTypeScaler.dylib arm64  <725a2ff41d7f315b834d14c969050ea8> /System/Library/PrivateFrameworks/FontServices.framework/libTrueTypeScaler.dylib
                                                0x19df7e000 - 0x19df83fff TextInputUI arm64  <5f3e83b8ed103077a4f0df5eb58f6368> /System/Library/PrivateFrameworks/TextInputUI.framework/TextInputUI
                                                0x19e66d000 - 0x19e848fff libFosl_dynamic.dylib arm64  <824eea765c503ac1ba0917abf74f38db> /usr/lib/libFosl_dynamic.dylib
                                                0x19ec57000 - 0x19ec86fff libpcap.A.dylib arm64  <5e8e5836c6ee38109cf607fcb398671a> /usr/lib/libpcap.A.dylib
                                                0x19ec87000 - 0x19ecbefff libsandbox.1.dylib arm64  <398892b5683531a2ba8833af790099f2> /usr/lib/libsandbox.1.dylib
                                                0x19ecc2000 - 0x19ed96fff AVFAudio arm64  <291f828312d038c9aecd48a7069cc790> /System/Library/Frameworks/AVFoundation.framework/Frameworks/AVFAudio.framework/AVFAudio
                                                0x19ed97000 - 0x19eda0fff ProactiveEventTracker arm64  <da5a5190c6043c40a89c3a82179257c8> /System/Library/PrivateFrameworks/ProactiveEventTracker.framework/ProactiveEventTracker
                                                0x19eda1000 - 0x19eee3fff Intents arm64  <8233bd87de6b35b995d0aeee596d7a48> /System/Library/Frameworks/Intents.framework/Intents
                                                0x19f01e000 - 0x19f041fff UserNotifications arm64  <23ee04a6460836929ab4494c2bffe5d9> /System/Library/Frameworks/UserNotifications.framework/UserNotifications
                                                0x19f051000 - 0x19f05ffff PersonaKit arm64  <685d10cd74153df0ac58f31db6e9f8a4> /System/Library/PrivateFrameworks/PersonaKit.framework/PersonaKit
                                                0x19f4b2000 - 0x19f638fff TextureIO arm64  <c761c83a9d3d353793a765e1a66164d9> /System/Library/PrivateFrameworks/TextureIO.framework/TextureIO
                                                0x19fb45000 - 0x19fb8dfff ContactsUICore arm64  <2a7eac654cb3330688777fbce01a48ec> /System/Library/PrivateFrameworks/ContactsUICore.framework/ContactsUICore
                                                0x1a08df000 - 0x1a0965fff AGXMetalA7 arm64  <23428469a5be3320b352cd6840bc8288> /System/Library/Extensions/AGXMetalA7.bundle/AGXMetalA7
                                                0x1a0966000 - 0x1a0978fff libBNNS.dylib arm64  <c5b5b579660333878b35b237714132e3> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libBNNS.dylib
                                                0x1a0979000 - 0x1a097efff libQuadrature.dylib arm64  <f96735a958f531ee83765f2237d3a0da> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libQuadrature.dylib
                                                0x1a0cb1000 - 0x1a0cc2fff CoreEmoji arm64  <7b72c0afc47f32988794951dca896329> /System/Library/PrivateFrameworks/CoreEmoji.framework/CoreEmoji
                                                0x1a1255000 - 0x1a131dfff NLP arm64  <5de1e299b3043ddeb78d5a1504bae28e> /System/Library/PrivateFrameworks/NLP.framework/NLP
                                                0x1a2166000 - 0x1a21d7fff libate.dylib arm64  <9d78bbf324af3a19b869f1f95ccbba0f> /usr/lib/libate.dylib
                                                0x1a21d8000 - 0x1a21d8fff libcoretls.dylib arm64  <c50a55eeb4fc36d3964e983efbf9866d> /usr/lib/libcoretls.dylib
                                                0x1a21d9000 - 0x1a21dafff libcoretls_cfhelpers.dylib arm64  <f7d161c350483e84a2a2e5c4c7dc30f5> /usr/lib/libcoretls_cfhelpers.dylib
                                                
                                                
                                                EOF
                                                
                                                  • Re: crash report _NSThreadPerformPerform
                                                    eskimo Apple Staff Apple Staff (6,685 points)

                                                    Not clear to me what "AVFAudio" is...

                                                    AVFAudio is a subframework of AVFoundation that implements all the AVAudio APIs.

                                                    I recently made changes in my app to how I handle audio interruptions (in addition to many other unrelated changes), so this gives me a place to start looking!

                                                    Looking at your crash log with tools here, I believe x2 from your crash log maps to the finishedPlaying: selector.  That gels with this comment.

                                                    I have an iPad Air 2 running iOS iOS 10.1.1, and the crash report was on an iPad mini 2 running iOS 10.0.2, so I'm not sure I can get the selector.

                                                    Yeah, as I mentioned earlier, without being able to test on a device with the same libraries as the crash log, I don’t know of any supported way to make progress.  OTOH, given that there’s been a lot of fixes under the bridge since 10.0.2, maybe you should just tell this user to upgrade and see if the problem reoccurs.

                                                    Share and Enjoy

                                                    Quinn “The Eskimo!”
                                                    Apple Developer Relations, Developer Technical Support, Core OS/Hardware
                                                    let myEmail = "eskimo" + "1" + "@apple.com"

                                                      • Re: crash report _NSThreadPerformPerform
                                                        ashort Level 1 Level 1 (0 points)

                                                        thanks.  I don't see a finishedPlaying selector anywhere, it must be a system call.  Of course, AVAudioPlayerDelegate has audioPlayerDidFinishPlaying, but I don't even use AVAudioPlayerDelegate anywhere  and I never set the delegate property of any AVAudioPlayer objects.

                                                         

                                                        Another recent change I made in my app is I I have a SpriteKit view where I was playing sounds a certain way, then because of bugs I switched to using AVAudioPlayer instead.  These AVAudioPlayer sounds play when 2 sprites bump into eachother, which is implemented by SKPhysicsContactDelegate didBeginContact.  Looking at the SKPhysicsWorld contactDelegate property, I noticed it still uses assign, not weak.  Which means on dealloc the contactDelegate is not set to nil.   So one possibility for the crash is after the view is dismissed, 2 sprites were just able to bump into each other, which calls didBeginContact, which then plays audio using AVAudioPlayer.   So I've updated my code to set contactDelegate to nil in dealloc.  We'll see if that fixes things.

                                                         

                                                        I have no way of contacting the user, since this is a crash report downloaded from Organizer in XCode.  In other words it's a user who agreed to "share information with Apple". 

                                                         

                                                        Thanks for all your help.  I have really appreciated it.  I learned a lot, and I think anyone else reading this thread has, too, particularly on how to examine the registers for certain kinds of crashes and dig a bit deeper.  Fascinating stuff.