Crash when app moved to background while some work proccessing on own queue

If you run the app with the debugger attached — so from the iPhone’s Home screen — does it also crash? And does that generate a crash report?

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

Hello Eskimo. Yes, it crashed when call is accepted, and after that app moved to background, after 8-10 seconds app crashed, debugger didn't stop on breakpoint, and just deattach and that's Crash report didn't generated ( if you mean popup with suggesting to share crash report )

Also, I wanna mention that contact sync is very huge operation, it load CPU for 200% and consume ~300MB memory ( when contact sync is not running, app consuming ~60mb of memory ). It's possible that app just killed by system? If yes, it's possible to catch any crash report about it? And also, if it's because of system kill, why on default qos it's didn't crash?

I wrote:

If you run the app with the debugger attached — so from the iPhone’s Home screen — does it also crash?

You wrote:

Yes, it crashed

Did that that generate a crash report? If so, please post it here using the instructions in Posting a Crash Report.

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

Hello Eskimo. I mean crashed = application closed by itself ( so, debug just deattached without stoping on crash point ), there is no any crash reports

Sorry, I checked crash reports on device, and found it

End time:         2023-04-11 17:41:46.415 +0300
OS Version:       iPhone OS 16.0 (Build 20A5358a)
Architecture:     arm64e
Report Version:   40
Incident Identifier: 1F445A43-8DCB-4E8D-96F9-209B10FDBC9C
 
Data Source:      Microstackshots
Shared Cache:     41C4C004-2ABC-3233-90B1-83787B898BAE slid base address 0x1c6514000, slide 0x46514000
 
Command:          ??
Path:             ???
Identifier:       ???
Version:          ???
Is First Party:   No
Beta Identifier:  E2CAB17F-6D07-443E-992A-4E2DC907A59C
Resource Coalition ID: 441
Architecture:     arm64
PID:              1213
 
Event:            cpu usage
Action taken:     Process killed
CPU:              9 seconds cpu time over 10 seconds (91% cpu average), exceeding limit of 60% cpu over 15 seconds
CPU limit:        9s
Limit duration:   15s
CPU used:         9s
CPU duration:     10s
Duration:         9.93s
Duration Sampled: 8.13s
Steps:            7
 
Hardware model:   iPhone12,8
Active cpus:      6
HW page size:     16384
VM page size:     16384
 
Advisory levels:  Battery -> 3, User -> 3, ThermalPressure -> 10, Combined -> 1
Free disk space:  29.02 GB/59.57 GB, low space threshold 150 MB
 
Preferred User Language: en-BY, ru-BY
Country Code:     BY
Keyboards:        ru_RU Russian, en_GB QWERTY
OS Cryptex File Extents: 501
 
Heaviest stack for the target process:
  6  ??? (libsystem_pthread.dylib + 2968) [0x2197ddb98]
  6  ??? (libsystem_pthread.dylib + 3516) [0x2197dddbc]
  6  ??? (libdispatch.dylib + 90756) [0x1d4620284]
  6  ??? (libdispatch.dylib + 88684) [0x1d461fa6c]
  6  ??? (libdispatch.dylib + 27348) [0x1d4610ad4]
  6  ??? (libdispatch.dylib + 29804) [0x1d461146c]
  6  ??? (libdispatch.dylib + 16348) [0x1d460dfdc]
  6  ??? (libdispatch.dylib + 9396) [0x1d460c4b4]
  6  ??? (BIP + 3065980) [0x10258887c]
  6  ??? (BIP + 19742016) [0x10356fd40]
  6  ??? (BIP + 19742452) [0x10356fef4]
  6  ??? (BIP + 10189732) [0x102c53ba4]
  6  ??? (BIP + 10187852) [0x102c5344c]
  6  ??? (BIP + 18086368) [0x1033db9e0]
  6  ??? (BIP + 18082508) [0x1033daacc]
  6  ??? (libswiftCore.dylib + 1944068) [0x1c729ba04]
  6  ??? (BIP + 18084192) [0x1033db160]
  6  ??? (BIP + 18084088) [0x1033db0f8]
  6  ??? (BIP + 18084044) [0x1033db0cc]
  6  ??? (BIP + 18083996) [0x1033db09c]
  6  ??? (BIP + 18083924) [0x1033db054]
  6  ??? (BIP + 19122028) [0x1034d876c]
  6  ??? (libswiftCore.dylib + 1944068) [0x1c729ba04]
  6  ??? (BIP + 19124192) [0x1034d8fe0]
  5  ??? (BIP + 19122648) [0x1034d89d8]
  5  ??? (BIP + 4782628) [0x10272ba24]
  5  ??? (BIP + 4782352) [0x10272b910]
  5  ??? (BIP + 8848368) [0x102b0c3f0]
  4  ??? (<84DA0320-5E0E-314A-871A-6B65FF5A37B8> + 30844) [0x113b2b87c]
  3  ??? (<84DA0320-5E0E-314A-871A-6B65FF5A37B8> + 31544) [0x113b2bb38]
  3  ??? (<9E5D4BE8-D37D-39D5-AD92-591942F765ED> + 143564) [0x1102130cc]
  1  ??? (<9E5D4BE8-D37D-39D5-AD92-591942F765ED> + 149396) [0x110214794]
  1  ??? (<9E5D4BE8-D37D-39D5-AD92-591942F765ED> + 139540) [0x110212114]
  1  ??? (Foundation + 107836) [0x1c767653c]
  1  ??? (CoreFoundation + 534692) [0x1cd23e8a4]
  1  ??? (CoreFoundation + 548664) [0x1cd241f38]
  1  ??? (CoreFoundation + 334200) [0x1cd20d978]
  1  ??? (CoreFoundation + 388804) [0x1cd21aec4]
  1  ??? (CoreFoundation + 72496) [0x1cd1cdb30]
 
 
Powerstats for:   ??
UUID:             EF3821FB-7111-3550-8A6A-F359EABEBDD6
Path:             ??
Identifier:       ??
Version:          ??
Is First Party:   No
Beta Identifier:  E2CAB17F-6D07-443E-992A-4E2DC907A59C
Resource Coalition ID: 441
Architecture:     arm64
Footprint:        214.69 MB -> 243.77 MB (+29.08 MB) (max 298.22 MB )
Pageins:          7 pages
Start time:       2023-04-11 17:41:37.975 +0300
End time:         2023-04-11 17:41:46.103 +0300
Num samples:      7 (100%)
Primary state:    6 samples Non-Frontmost App, Non-Suppressed, User mode, Effective Thread QoS Utility, Requested Thread QoS Utility, Override Thread QoS Unspecified
User Activity:    0 samples Idle, 7 samples Active

Sorry, I checked crash reports on device, and found it

Is that the whole thing?

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"