On-Device Build Crashing on Level Load

Development Platform & Builds Mobile
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1

One level in our game is crashing on launch on later-model iOS devices, both iPhones and iPads. It appears to be related to texture loading in Metal - if we disable metal support, the crash goes away.

We’re on 4.7.6, build is generated on a Mac. Project does have C++.

Stack trace follows:

Incident Identifier: 73546659-E37A-401C-BACD-DBE49A7F791A
CrashReporter Key:   80be92bcd7e200e3112ffd4b6ccad827c13762b1
Hardware Model:      iPad4,4
Process:              [3114]
Path:                /private/var/mobile/Containers/Bundle/Application/5084D7B3-0EAE-426F-B5AC-D4D87ABBF42D/.app/
Identifier:          com.empiricaldevelopment.
Version:             200 (1.0.0)
Code Type:           ARM-64 (Native)
Parent Process:      launchd [1]

Date/Time:           2015-05-07 17:44:00.217 -0400
Launch Time:         2015-05-07 17:43:45.656 -0400
OS Version:          iOS 8.3 (12F69)
Report Version:      105

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Triggered by Thread:  15

Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0:
0   libsystem_kernel.dylib        	0x0000000194370e0c mach_msg_trap + 8
1   libsystem_kernel.dylib        	0x0000000194370c84 mach_msg + 68
2   CoreFoundation                	0x00000001826ff720 __CFRunLoopServiceMachPort + 196
3   CoreFoundation                	0x00000001826fd674 __CFRunLoopRun + 936
4   CoreFoundation                	0x00000001826292d0 CFRunLoopRunSpecific + 392
5   GraphicsServices              	0x000000018bcef6f8 GSEventRunModal + 164
6   UIKit                         	0x00000001871eefa8 UIApplicationMain + 1484
7                   	0x000000010005c648 0x10004c000 + 67144
8   libdyld.dylib                 	0x0000000194272a04 start + 0

Thread 1 name:  Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0   libsystem_kernel.dylib        	0x0000000194370c24 kevent64 + 8
1   libdispatch.dylib             	0x0000000194255e6c _dispatch_mgr_invoke + 272
2   libdispatch.dylib             	0x0000000194247998 _dispatch_mgr_thread + 48

Thread 2:
0   libsystem_kernel.dylib        	0x000000019438bc78 __workq_kernreturn + 8
1   libsystem_pthread.dylib       	0x00000001944252d8 _pthread_wqthread + 988
2   libsystem_pthread.dylib       	0x0000000194424eec start_wqthread + 0

Thread 3:
0   libsystem_kernel.dylib        	0x000000019438bc78 __workq_kernreturn + 8
1   libsystem_pthread.dylib       	0x00000001944252d8 _pthread_wqthread + 988
2   libsystem_pthread.dylib       	0x0000000194424eec start_wqthread + 0

Thread 4:
0   libsystem_kernel.dylib        	0x000000019438bc78 __workq_kernreturn + 8
1   libsystem_pthread.dylib       	0x00000001944252d8 _pthread_wqthread + 988
2   libsystem_pthread.dylib       	0x0000000194424eec start_wqthread + 0

Thread 5:
0   libsystem_kernel.dylib        	0x000000019438bc78 __workq_kernreturn + 8
1   libsystem_pthread.dylib       	0x00000001944252d8 _pthread_wqthread + 988
2   libsystem_pthread.dylib       	0x0000000194424eec start_wqthread + 0

Thread 6:
0                   	0x0000000100cdfbe0 0x10004c000 + 13188064
1                   	0x0000000100d15b38 0x10004c000 + 13409080
2                   	0x00000001016bd6ec 0x10004c000 + 23533292
3                   	0x00000001016bd5ac 0x10004c000 + 23532972
4                   	0x000000010165d6a8 0x10004c000 + 23140008
5                   	0x00000001016bec58 0x10004c000 + 23538776
6                   	0x000000010166099c 0x10004c000 + 23153052
7                   	0x0000000101660784 0x10004c000 + 23152516
8                   	0x0000000101661a2c 0x10004c000 + 23157292
9                   	0x00000001003035c4 0x10004c000 + 2848196
10                  	0x0000000100302570 0x10004c000 + 2844016
11                  	0x0000000101553de0 0x10004c000 + 22052320
12                  	0x0000000101550410 0x10004c000 + 22037520
13                  	0x0000000101551818 0x10004c000 + 22042648
14                  	0x00000001012f7448 0x10004c000 + 19575880
15                  	0x000000010005a6ac 0x10004c000 + 59052
16                  	0x000000010024fd14 0x10004c000 + 2112788
17  Foundation                    	0x0000000183649db4 __NSThread__main__ + 1068
18  libsystem_pthread.dylib       	0x0000000194427dc4 _pthread_body + 160
19  libsystem_pthread.dylib       	0x0000000194427d20 _pthread_start + 156
20  libsystem_pthread.dylib       	0x0000000194424ef4 thread_start + 0

Thread 7 name:  AVAudioSession Notify Thread
Thread 7:
0   libsystem_kernel.dylib        	0x0000000194370e0c mach_msg_trap + 8
1   libsystem_kernel.dylib        	0x0000000194370c84 mach_msg + 68
2   CoreFoundation                	0x00000001826ff720 __CFRunLoopServiceMachPort + 196
3   CoreFoundation                	0x00000001826fd674 __CFRunLoopRun + 936
4   CoreFoundation                	0x00000001826292d0 CFRunLoopRunSpecific + 392
5   libAVFAudio.dylib             	0x00000001810a502c GenericRunLoopThread::Entry(void*) + 160
6   libAVFAudio.dylib             	0x0000000181097a0c CAPThread::Entry(CAPThread*) + 116
7   libsystem_pthread.dylib       	0x0000000194427dc4 _pthread_body + 160
8   libsystem_pthread.dylib       	0x0000000194427d20 _pthread_start + 156
9   libsystem_pthread.dylib       	0x0000000194424ef4 thread_start + 0

Thread 8 name:  PoolThread 0
Thread 8:
0   libsystem_kernel.dylib        	0x000000019438b078 __psynch_cvwait + 8
1   libsystem_pthread.dylib       	0x0000000194426f28 _pthread_cond_wait + 620
2                   	0x000000010019e388 0x10004c000 + 1385352
3                   	0x00000001001b4490 0x10004c000 + 1475728
4                   	0x00000001001bf6e8 0x10004c000 + 1521384
5   libsystem_pthread.dylib       	0x0000000194427dc4 _pthread_body + 160
6   libsystem_pthread.dylib       	0x0000000194427d20 _pthread_start + 156
7   libsystem_pthread.dylib       	0x0000000194424ef4 thread_start + 0

Thread 9 name:  TaskGraphThread 0
Thread 9:
0   libsystem_kernel.dylib        	0x000000019438b078 __psynch_cvwait + 8
1   libsystem_pthread.dylib       	0x0000000194426f28 _pthread_cond_wait + 620
2                   	0x000000010019e388 0x10004c000 + 1385352
3                   	0x00000001001c2b40 0x10004c000 + 1534784
4                   	0x00000001001c2834 0x10004c000 + 1534004
5                   	0x00000001001c2668 0x10004c000 + 1533544
6                   	0x00000001001c3584 0x10004c000 + 1537412
7                   	0x00000001001bf6e8 0x10004c000 + 1521384
8   libsystem_pthread.dylib       	0x0000000194427dc4 _pthread_body + 160
9   libsystem_pthread.dylib       	0x0000000194427d20 _pthread_start + 156
10  libsystem_pthread.dylib       	0x0000000194424ef4 thread_start + 0

Thread 10:
0   libsystem_kernel.dylib        	0x0000000194370e0c mach_msg_trap + 8
1   libsystem_kernel.dylib        	0x0000000194370c84 mach_msg + 68
2   CoreFoundation                	0x00000001826ff720 __CFRunLoopServiceMachPort + 196
3   CoreFoundation                	0x00000001826fd674 __CFRunLoopRun + 936
4   CoreFoundation                	0x00000001826292d0 CFRunLoopRunSpecific + 392
5   Foundation                    	0x00000001835614c4 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 312
6   Foundation                    	0x00000001835bb80c -[NSRunLoop(NSRunLoop) run] + 92
7   Foundation                    	0x0000000183649db4 __NSThread__main__ + 1068
8   libsystem_pthread.dylib       	0x0000000194427dc4 _pthread_body + 160
9   libsystem_pthread.dylib       	0x0000000194427d20 _pthread_start + 156
10  libsystem_pthread.dylib       	0x0000000194424ef4 thread_start + 0

Thread 11 name:  AsyncIOSystem
Thread 11:
0   libsystem_kernel.dylib        	0x000000019438b078 __psynch_cvwait + 8
1   libsystem_pthread.dylib       	0x0000000194426f28 _pthread_cond_wait + 620
2                   	0x000000010019e388 0x10004c000 + 1385352
3                   	0x0000000100244154 0x10004c000 + 2064724
4                   	0x0000000100243dac 0x10004c000 + 2063788
5                   	0x00000001001bf6e8 0x10004c000 + 1521384
6   libsystem_pthread.dylib       	0x0000000194427dc4 _pthread_body + 160
7   libsystem_pthread.dylib       	0x0000000194427d20 _pthread_start + 156
8   libsystem_pthread.dylib       	0x0000000194424ef4 thread_start + 0

Thread 12 name:  FMessageBus.Router
Thread 12:
0   libsystem_kernel.dylib        	0x000000019438b078 __psynch_cvwait + 8
1   libsystem_pthread.dylib       	0x0000000194426f28 _pthread_cond_wait + 620
2                   	0x000000010019e2d8 0x10004c000 + 1385176
3                   	0x0000000101080680 0x10004c000 + 16991872
4                   	0x00000001001bf6e8 0x10004c000 + 1521384
5   libsystem_pthread.dylib       	0x0000000194427dc4 _pthread_body + 160
6   libsystem_pthread.dylib       	0x0000000194427d20 _pthread_start + 156
7   libsystem_pthread.dylib       	0x0000000194424ef4 thread_start + 0

Thread 13 name:  AURemoteIO::IOThread
Thread 13:
0   libsystem_kernel.dylib        	0x0000000194370e0c mach_msg_trap + 8
1   libsystem_kernel.dylib        	0x0000000194370c84 mach_msg + 68
2   AudioToolbox                  	0x0000000181d173ac AURemoteIO::IOThread::Run() + 112
3   AudioToolbox                  	0x0000000181d1ab90 AURemoteIO::IOThread::Entry(void*) + 8
4   AudioToolbox                  	0x0000000181c3851c CAPThread::Entry(CAPThread*) + 140
5   libsystem_pthread.dylib       	0x0000000194427dc4 _pthread_body + 160
6   libsystem_pthread.dylib       	0x0000000194427d20 _pthread_start + 156
7   libsystem_pthread.dylib       	0x0000000194424ef4 thread_start + 0

Thread 14:
0   libsystem_kernel.dylib        	0x0000000194370e0c mach_msg_trap + 8
1   libsystem_kernel.dylib        	0x0000000194370c84 mach_msg + 68
2   CoreFoundation                	0x00000001826ff720 __CFRunLoopServiceMachPort + 196
3   CoreFoundation                	0x00000001826fd674 __CFRunLoopRun + 936
4   CoreFoundation                	0x00000001826292d0 CFRunLoopRunSpecific + 392
5   CoreFoundation                	0x000000018267b358 CFRunLoopRun + 108
6   CoreMotion                    	0x0000000183034364 0x182fec000 + 295780
7   libsystem_pthread.dylib       	0x0000000194427dc4 _pthread_body + 160
8   libsystem_pthread.dylib       	0x0000000194427d20 _pthread_start + 156
9   libsystem_pthread.dylib       	0x0000000194424ef4 thread_start + 0

Thread 15 name:  RenderThread 1
Thread 15 Crashed:
0   libsystem_kernel.dylib        	0x000000019438b270 __pthread_kill + 8
1   libsystem_pthread.dylib       	0x000000019442916c pthread_kill + 108
2   libsystem_c.dylib             	0x0000000194302b14 abort + 108
3   libsystem_c.dylib             	0x00000001942d7a38 __assert_rtn + 88
4   Metal                         	0x0000000185147b0c MTLReportFailure + 452
5   Metal                         	0x000000018511d8c4 -[MTLTextureDescriptor validate] + 196
6   AGXMetal                      	0x0000000106310630 0x1062f8000 + 99888
7                   	0x0000000100069f30 0x10004c000 + 122672
8                   	0x000000010006a790 0x10004c000 + 124816
9                   	0x00000001008c0a9c 0x10004c000 + 8866460
10                  	0x000000010152d89c 0x10004c000 + 21895324
11                  	0x00000001008c8cc8 0x10004c000 + 8899784
12                  	0x00000001008ccf94 0x10004c000 + 8916884
13                  	0x00000001001c2770 0x10004c000 + 1533808
14                  	0x00000001001c2668 0x10004c000 + 1533544
15                  	0x00000001008cbaac 0x10004c000 + 8911532
16                  	0x00000001008d0c2c 0x10004c000 + 8932396
17                  	0x00000001001bf6e8 0x10004c000 + 1521384
18  libsystem_pthread.dylib       	0x0000000194427dc4 _pthread_body + 160
19  libsystem_pthread.dylib       	0x0000000194427d20 _pthread_start + 156
20  libsystem_pthread.dylib       	0x0000000194424ef4 thread_start + 0

Thread 16 name:  RTHeartBeat 1
Thread 16:
0   libsystem_kernel.dylib        	0x000000019438b570 __semwait_signal + 8
1   libsystem_c.dylib             	0x00000001942ad92c nanosleep + 212
2   libsystem_c.dylib             	0x00000001942ad848 usleep + 64
3                   	0x000000010019e13c 0x10004c000 + 1384764
4                   	0x00000001008cfd48 0x10004c000 + 8928584
5                   	0x00000001001bf6e8 0x10004c000 + 1521384
6   libsystem_pthread.dylib       	0x0000000194427dc4 _pthread_body + 160
7   libsystem_pthread.dylib       	0x0000000194427d20 _pthread_start + 156
8   libsystem_pthread.dylib       	0x0000000194424ef4 thread_start + 0

Thread 15 crashed with ARM Thread State (64-bit):
    x0: 0x0000000000000000   x1: 0x0000000000000000   x2: 0x0000000000000000   x3: 0x0000000000000000
    x4: 0x0000000000000000   x5: 0x0000000000000000   x6: 0x000000000000002e   x7: 0x0000000000000000
    x8: 0x0000000008000000   x9: 0x0000000004000000  x10: 0x0000000000000000  x11: 0x0000000000000032
   x12: 0x000000014f050fc0  x13: 0x000001a59488f959  x14: 0x0000000194892550  x15: 0x00000001740f1fb1
   x16: 0x0000000000000148  x17: 0x0000000182635b2c  x18: 0x0000000000000000  x19: 0x0000000000000006
   x20: 0x000000010ab58000  x21: 0x0000000000000000  x22: 0x000000018515abd1  x23: 0x000000019815b0a8
   x24: 0x0000000194e0a000  x25: 0x0000000000000001  x26: 0x0000000000000007  x27: 0x000000010241fa50
   x28: 0x00000001189026b8  fp: 0x000000010ab578f0   lr: 0x0000000194429170
    sp: 0x000000010ab578d0   pc: 0x000000019438b270 cpsr: 0x00000000

Binary Images:
0x10004c000 - 0x102233fff  arm64  <0288e1168ac63ff795024a5d0634a9ea> /var/mobile/Containers/Bundle/Application/5084D7B3-0EAE-426F-B5AC-D4D87ABBF42D/.app/
0x1062f8000 - 0x1063d7fff AGXMetal arm64  <69feb2835e803ef8b17e94bea57e9dd1> /System/Library/Extensions/AGXMetal.bundle/AGXMetal
0x1200a4000 - 0x1200cbfff dyld arm64  <75c68bbe28b13fcd91014f15139742dc> /usr/lib/dyld
0x180ef4000 - 0x181088fff AVFoundation arm64  <c69cb19d6db0339bbfb4c18fa7f4f26c> /System/Library/Frameworks/AVFoundation.framework/AVFoundation
0x18108c000 - 0x1810f0fff libAVFAudio.dylib arm64  <fdd31b28c0ec3f76b8f0fa9a057e43d9> /System/Library/Frameworks/AVFoundation.framework/libAVFAudio.dylib
0x1810f4000 - 0x181133fff AVKit arm64  <662188dbb9233944bbffc40c217bba7f> /System/Library/Frameworks/AVKit.framework/AVKit
0x181134000 - 0x181134fff Accelerate arm64  <a2161063fee1315193bc488d0354f43e> /System/Library/Frameworks/Accelerate.framework/Accelerate
0x18114c000 - 0x18136bfff vImage arm64  <74eb7b77dbcd321db86e784be9353a08> /System/Library/Frameworks/Accelerate.framework/Frameworks/vImage.framework/vImage
0x18136c000 - 0x181413fff libBLAS.dylib arm64  <56e8b79c2c03379dad45fe2ea1a4052f> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libBLAS.dylib
0x181414000 - 0x18178efff libLAPACK.dylib arm64  <fd491ae19b12315babb621650a0eef76> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libLAPACK.dylib
0x181790000 - 0x1817a5fff libLinearAlgebra.dylib arm64  <9307063a5e1833abbb857a9ec4c5369e> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libLinearAlgebra.dylib
0x1817a8000 - 0x181810fff libvDSP.dylib arm64  <d4d2b4a941213e2b81f3ddafd6b8a312> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libvDSP.dylib
0x181814000 - 0x181837fff libvMisc.dylib arm64  <92a0dd635be43dfe8c128c888ef37c0e> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libvMisc.dylib
0x181838000 - 0x181838fff vecLib arm64  <9248f57f1d8430219a810aa93254f157> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/vecLib
0x18183c000 - 0x18186bfff Accounts arm64  <4199851056d4376aa4d8668b83c85454> /System/Library/Frameworks/Accounts.framework/Accounts
0x18186c000 - 0x18186cfff AdSupport arm64  <f172a17bdc2e3bd19b952a69e0021450> /System/Library/Frameworks/AdSupport.framework/AdSupport
0x181870000 - 0x1818eefff AddressBook arm64  <73735c2a294139e5b99ada613fc861ea> /System/Library/Frameworks/AddressBook.framework/AddressBook
0x1818f0000 - 0x181a43fff AddressBookUI arm64  <860bc29210ba3d7c80dc83a83388e31c> /System/Library/Frameworks/AddressBookUI.framework/AddressBookUI
0x181c0c000 - 0x181eccfff AudioToolbox arm64  <760c2dc59fa13660a769cc1b052d41e6> /System/Library/Frameworks/AudioToolbox.framework/AudioToolbox
0x18206c000 - 0x18227ffff CFNetwork arm64  <df5535d1633f375aa889f755db0a93b9> /System/Library/Frameworks/CFNetwork.framework/CFNetwork
0x182280000 - 0x18231cfff CloudKit arm64  <c24c6a0eeb1a38b598fafc24e9974595> /System/Library/Frameworks/CloudKit.framework/CloudKit
0x182320000 - 0x182385fff CoreAudio arm64  <b85ca2cdb29639ccb5f6405baf597027> /System/Library/Frameworks/CoreAudio.framework/CoreAudio
0x1823ac000 - 0x1823cdfff CoreBluetooth arm64  <fbd7cbc4b2533ea38844bf98757ce58d> /System/Library/Frameworks/CoreBluetooth.framework/CoreBluetooth
0x1823d0000 - 0x18261cfff CoreData arm64  <af13d4e830e13607b745fe57f90e5d5e> /System/Library/Frameworks/CoreData.framework/CoreData
0x182620000 - 0x18297efff CoreFoundation arm64  <6548b13bef1f3f958d96266f7c4c44e0> /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
0x182980000 - 0x182ae2fff CoreGraphics arm64  <92162d42d08d357ab66302a38d724828> /System/Library/Frameworks/CoreGraphics.framework/CoreGraphics
0x182b38000 - 0x182b3afff libCGXType.A.dylib arm64  <8f40b7d9b97b344f9c7a5a0b79bdc2b7> /System/Library/Frameworks/CoreGraphics.framework/Resources/libCGXType.A.dylib
0x182b3c000 - 0x182b47fff libCMSBuiltin.A.dylib arm64  <a40d7bdbbe6c3317bcf4c20c085df848> /System/Library/Frameworks/CoreGraphics.framework/Resources/libCMSBuiltin.A.dylib
0x182d3c000 - 0x182d5afff libRIP.A.dylib arm64  <975284709e51353690ec8a651b43c1db> /System/Library/Frameworks/CoreGraphics.framework/Resources/libRIP.A.dylib
0x182d5c000 - 0x182e8efff CoreImage arm64  <d7a2122dc8173803bc220fde3cfebfdf> /System/Library/Frameworks/CoreImage.framework/CoreImage
0x182e90000 - 0x182eeefff CoreLocation arm64  <a166ad7f12f93406b54ae6a170fb38ee> /System/Library/Frameworks/CoreLocation.framework/CoreLocation
0x182f28000 - 0x182febfff CoreMedia arm64  <403a9798401c3b70a207e0e236454c0d> /System/Library/Frameworks/CoreMedia.framework/CoreMedia
0x182fec000 - 0x1830dafff CoreMotion arm64  <61338e072f2a385ab4e315975f23eea2> /System/Library/Frameworks/CoreMotion.framework/CoreMotion
0x1830dc000 - 0x18314dfff CoreTelephony arm64  <d9adf384d64d30319eac8e8711ede892> /System/Library/Frameworks/CoreTelephony.framework/CoreTelephony
0x183150000 - 0x183258fff CoreText arm64  <4a9633cee0393585a98fcf07410e0828> /System/Library/Frameworks/CoreText.framework/CoreText
0x18325c000 - 0x183279fff CoreVideo arm64  <217e5b69f6d03f8893f01de3e40915a8> /System/Library/Frameworks/CoreVideo.framework/CoreVideo
0x18327c000 - 0x1833a0fff EventKit arm64  <f7af75b17dac3c5aa8dc91a1edd1df37> /System/Library/Frameworks/EventKit.framework/EventKit
0x183554000 - 0x1837acfff Foundation arm64  <509b484fb7b634b19673d50296d8278f> /System/Library/Frameworks/Foundation.framework/Foundation
0x1837b0000 - 0x1837dcfff GLKit arm64  <441c8888be7b3b959eee97ab345ef841> /System/Library/Frameworks/GLKit.framework/GLKit
0x1837e0000 - 0x183809fff GSS arm64  <3dae218853563b1a985b80d6a353bad8> /System/Library/Frameworks/GSS.framework/GSS
0x183820000 - 0x183820fff GameKit arm64  <c341b68cab9f36c6a703d8e881db906f> /System/Library/Frameworks/GameKit.framework/GameKit
0x1838f4000 - 0x18395ffff IOKit arm64  <311bed1f2b893195b8c0564d8925bfa2> /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
0x183960000 - 0x183c03fff ImageIO arm64  <7d3c81746f2c3f1488b3efc633d21633> /System/Library/Frameworks/ImageIO.framework/ImageIO
0x183c04000 - 0x1840a5fff JavaScriptCore arm64  <1ad0ed311f3e3897bac70f3388fc05be> /System/Library/Frameworks/JavaScriptCore.framework/JavaScriptCore
0x1849e0000 - 0x1849e6fff MediaAccessibility arm64  <4e3e82a2b09a38fcbf01843f97d5e604> /System/Library/Frameworks/MediaAccessibility.framework/MediaAccessibility
0x1849e8000 - 0x184c0bfff MediaPlayer arm64  <fb0500c5695c36b5b54865f533cc899e> /System/Library/Frameworks/MediaPlayer.framework/MediaPlayer
0x184c0c000 - 0x18502afff MediaToolbox arm64  <c2103a7dd16e3f67abfe898b039061e7> /System/Library/Frameworks/MediaToolbox.framework/MediaToolbox
0x18502c000 - 0x185100fff MessageUI arm64  <000bbe6f4a8c32bda9c8ea674a7f200d> /System/Library/Frameworks/MessageUI.framework/MessageUI
0x185104000 - 0x18517cfff Metal arm64  <eb54636e26cd3dee870fa5e4fb708fe6> /System/Library/Frameworks/Metal.framework/Metal
0x185180000 - 0x185231fff MobileCoreServices arm64  <daa61b358c17365792c20df791224e26> /System/Library/Frameworks/MobileCoreServices.framework/MobileCoreServices
0x1864ac000 - 0x1864b6fff OpenGLES arm64  <8824bb82d43937a9b0aa3870ece35772> /System/Library/Frameworks/OpenGLES.framework/OpenGLES
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2

That is a Metal validation assertion. We need the log from the game to be able to determine what it is.

Either debug it in Xcode, or use the Devices tab in Xcode and bring up the bottom pane if it’s collapsed to get the output.

Josh

3

Here’s the device log.

4

Umm, weird, there aren’t very many printouts there. Even if our game wasn’t logging, Metal should be printing something. Is there any chance you can run it through the Xcode debugger?

5

41824-screen+shot+2015-05-07+at+6.49.53+pm.png
41824-screen+shot+2015-05-07+at+6.49.53+pm.png905×187 39.4 KB

We normally build from inside UE4, so I’m not as familiar with doing it through Xcode, but this is just strange. LLDB says there are no breakpoints set:

2015-05-07 18:50:14.467 [3253:1649689] No ue4commandline.txt [/private/var/mobile/Containers/Bundle/Application/D05D0D5F-3AD0-4154-BDBA-0FE64E60EC8E/.app/ue4commandline.txt] found
2015-05-07 18:50:14.468 [3253:1649689] Combined iOS Commandline:  /Users//dev/MC_RepublicSniper//.uproject -debug
========= This app is in LANDSCAPE mode
2015-05-07 18:50:14.611 [3253:1649689] Attempting to badge the application icon but haven't received permission from the user to badge the application
(lldb) breakpoint list
No breakpoints currently set.
(lldb)

But it stops here, and if I hit continue, it stops here again.

In the morning, I can try debugging this problem to get you the log, but I’ve got to head home, sorry.

6

Josh - been fighting with getting a build to run in Debug mode all morning. I was never able to do it via Xcode (seems to be missing cooked data even if I package in the Editor before launching from Xcode), but I was able to install a DebugGame version of the app from the Launcher and to this log:

Log

7

I meant actually run it with the debugger attached, so you get a callstack and everything at the exact time of crash. Logs are not saying much.

8

I know what you meant, but I can’t get it to run that way. I spent all morning trying to get it to run in the debugger, but it kept hitting the trap in EXC_CRASH (SIGSEGV) (ICUInternationalization line 118). It appears to be caused by it not finding the cooked directories, but I have yet to figure out a way to get it to do a successful build and run to device from Xcode. I’ve tried packaging the project for iOS from the editor using the same configuration, I’ve tried launching from the Device Manager with “By the Book” Data Build selected.

If you can point me to some documentation on the process, I would love nothing more than to be able to debug properly on the device and get you better information, but I’ve wasted many hours on trying to debug from Xcode over the course of the last year. I can build fine, launch fine, but when I try to run from Xcode, no luck.

9

Oh sorry, missed that. If you cook by the book, it will generate a .ipa with all of the data in it. If that is not the .ipa you are running, you can manually point Xcode at it. So then, it will load that .ipa on the device and debug it.

With 4.8 (I forget about 4.7) if you just do a Launch On in the editor, it will copy content in the Documents directory on the device. Then you can run an empty .ipa (just compiled, no need to package it up), and the game will find the installed data when you run with Xcode.

Or you can use cook on the fly, and not worry about any of it:

Run:
UE4Editor.app/Contents/Mac/UE4Editor -run=cook -cookonthefly

In Xcode, run the game with MyGame/MyGame.uproject -filehostip=

Josh

10

I hate to keep bothering you… if you want to tell me to go RTFM, just point me at the M and I’ll go figure this out :slight_smile:

Trying to cook on the fly, I get this error. It appears to be trying to write to a directory at the root of my hard drive that doesn’t exist. Not sure if this is a permissions error, but I couldn’t find a reference to /PublicStaging/ in any of the config files to change it.

link text

11

Ya, we always write the IPA to the public staging directory so it can be installed. This looks like it is having problems keeping your device connected. Could you try a different cable?

12

Different cables and different devices, On the Fly builds crash with this same error every time. I even tried deleting Intermediate directory but no luck.

Device Launcher will successfully go through the process with “By the Book” cook, but the app launches then immediately quits. Attempting to then launch from Xcode hits the same FICUInternationalization trap, even though the data has been copied over to the device.

I’m frustrated. I’ve wasted hours trying to find a way to debug on the device. Is there, anywhere, a step-by-step guide for debugging on device? I have no idea if I’m doing something wrong, if there’s something wrong with my project, or if it’s something else entirely.

Maybe I’ll try with 4.8 over the weekend.

13

The bad news is, I still haven’t been able to run successfully from Xcode using the debugger. The good news is, I figured out what was triggering the crash. I had a decal texture in the level that was crashing. With OpenGL ES, those are just ignored and not used, but apparently under Metal, they seem to trigger this crash, because once I removed it I was able to launch the level on a Metal build.

14

so the way I debug using Xcode is to utilize the Project Launcher to generate an IPA utilizing Cook By the Book. This will put all of the data in the Game/Binaries/IOS/Payload/Game.app directory (you can verify that by opening up that directory and verify there is a cookeddata directory in there). Then, I can run the app from the generated Xcode project usually found in the Game/ directory. This will allow me to debug the app. There was a bug in 4.7 tho that would cause the game to run out of stack space in Debug in 4.7 and even the first couple of 4.8 previews, so you may have been running in to that bug.