App freeze when send action in iOS simulator 15.0 if debugger is not attached

[dwirandyh]

Description

Hello guys,

i'm new adopter in the composable architecture, the architecture seems good to me, but i face problem when i build and run my application to iOS simulator 15.0 it work fine my app can run perfectly, but if i stop running xcode and start my app directly by tapping app icon in simulator the app start freezing when i start to send action.

I don't know why, i also try provided example Search Project from this repostitory, it also freeze when i directly open the app from simulator by tapping app icon (without running xcode build & run)

I want to know why and how to solve this, does it will freeze as well in real device, since my application deployment target is 15.0 and i can did not have the device with iOS 15.0 to test it

Here is log file that i got when running the app

-------------------------------------
Translated Report (Full Report Below)
-------------------------------------

Incident Identifier: 36DB9CF2-9295-447C-B846-3CE86ADBDCA2
CrashReporter Key:   AB298619-58B2-EAD9-670E-A937D1544BA9
Hardware Model:      MacBookPro18,1
Process:             Search [12075]
Path:                /Users/USER/Library/Developer/CoreSimulator/Devices/AC2344A6-3420-4BDF-87A5-9FA088C8849F/data/Containers/Bundle/Application/C615A1E2-3EF3-41F1-AD3C-931BE7B99F4A/Search.app/Search
Identifier:          co.pointfree.Search
Version:             1.0 (1)
Code Type:           ARM-64 (Native)
Role:                Foreground
Parent Process:      launchd_sim [11538]
Coalition:           com.apple.CoreSimulator.SimDevice.AC2344A6-3420-4BDF-87A5-9FA088C8849F [1149]
Responsible Process: SimulatorTrampoline [1684]

Date/Time:           2023-09-13 09:35:17.5615 +0700
Launch Time:         2023-09-13 09:35:04.9137 +0700
OS Version:          macOS 13.4 (22F66)
Release Type:        User
Report Version:      104

Exception Type:  EXC_CRASH (SIGKILL)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Termination Reason: FRONTBOARD 2343432205 
<RBSTerminateContext| domain:10 code:0x8BADF00D explanation:[application<co.pointfree.Search>:12075] failed to terminate gracefully after 5.0s
ProcessVisibility: Unknown
ProcessState: Running
WatchdogEvent: process-exit
WatchdogVisibility: Background
WatchdogCPUStatistics: (
"Elapsed total CPU time (seconds): 17.090 (user 10.320, system 6.770), 31% CPU",
"Elapsed application CPU time (seconds): 4.713, 9% CPU"
) reportType:CrashLog maxTerminationResistance:Interactive>

Triggered by Thread:  0

Thread 0 Crashed::  Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib        	       0x1c7f861fc syscall_thread_switch + 8
1   libdispatch.dylib             	       0x180122b38 __DISPATCH_WAIT_FOR_ENQUEUER__ + 44
2   libdispatch.dylib             	       0x180117f44 _dispatch_main_queue_callback_4CF + 592
3   CoreFoundation                	       0x18034fc34 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
4   CoreFoundation                	       0x18034a1a4 __CFRunLoopRun + 2448
5   CoreFoundation                	       0x180349308 CFRunLoopRunSpecific + 572
6   GraphicsServices              	       0x18bf025ec GSEventRunModal + 160
7   UIKitCore                     	       0x184d3b4e0 -[UIApplication _run] + 992
8   UIKitCore                     	       0x184d3ffc0 UIApplicationMain + 112
9   SwiftUI                       	       0x1b93bed98 closure #1 in KitRendererCommon(_:) + 160
10  SwiftUI                       	       0x1b93becf4 runApp<A>(_:) + 164
11  SwiftUI                       	       0x1b8e12fb0 static App.main() + 80
12  Search                        	       0x100763154 static SearchApp.$main() + 160 (SearchApp.swift:4)
13  Search                        	       0x10076320c main + 12
14  dyld_sim                      	       0x101059c04 start_sim + 20
15  dyld                          	       0x101161f28 start + 2236

Thread 1:
0   libsystem_pthread.dylib       	       0x1c7fde634 start_wqthread + 0

Thread 2:
0   libsystem_pthread.dylib       	       0x1c7fde634 start_wqthread + 0

Thread 3:: com.apple.uikit.eventfetch-thread
0   libsystem_kernel.dylib        	       0x1c7f86190 mach_msg2_trap + 8
1   libsystem_kernel.dylib        	       0x1c7f97258 mach_msg2_internal + 76
2   libsystem_kernel.dylib        	       0x1c7f8e398 mach_msg_overwrite + 540
3   libsystem_kernel.dylib        	       0x1c7f86500 mach_msg + 20
4   CoreFoundation                	       0x18034f770 __CFRunLoopServiceMachPort + 368
5   CoreFoundation                	       0x180349c84 __CFRunLoopRun + 1136
6   CoreFoundation                	       0x180349308 CFRunLoopRunSpecific + 572
7   Foundation                    	       0x180810a68 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 232
8   Foundation                    	       0x180810d20 -[NSRunLoop(NSRunLoop) runUntilDate:] + 88
9   UIKitCore                     	       0x184def638 -[UIEventFetcher threadMain] + 472
10  Foundation                    	       0x18083a4f4 __NSThread__start__ + 772
11  libsystem_pthread.dylib       	       0x1c7fe3428 _pthread_start + 116
12  libsystem_pthread.dylib       	       0x1c7fde648 thread_start + 8

Thread 4:
0   libsystem_pthread.dylib       	       0x1c7fde634 start_wqthread + 0


Thread 0 crashed with ARM Thread State (64-bit):
    x0: 0x0000000000000000   x1: 0x0000000000000004   x2: 0x00000000037c3fa4   x3: 0x0000000000000001
    x4: 0x0000000000000000   x5: 0x0000000000000819   x6: 0x0000000000000000   x7: 0x0000000000000000
    x8: 0x0000000000000000   x9: 0x0000000000000000  x10: 0xfffffffe7fe6d42b  x11: 0x0000000500000000
   x12: 0x0080000000000000  x13: 0x0000004000000001  x14: 0x0060001500001f01  x15: 0x0060001500001f01
   x16: 0xffffffffffffffc3  x17: 0x0060001500001f01  x18: 0x0000000000000000  x19: 0x000000014651d740
   x20: 0x00000000037c3fa4  x21: 0x00000001da81b370  x22: 0x0000000000000000  x23: 0x00000001d6408d40
   x24: 0x000000000000000f  x25: 0x000000014651d730  x26: 0x0000000000000000  x27: 0x0000000000000000
   x28: 0x0000000000000000   fp: 0x000000016f6ad340   lr: 0x0000000180122b38
    sp: 0x000000016f6ad330   pc: 0x00000001c7f861fc cpsr: 0x60001000
   far: 0x000000016be0f7d8  esr: 0x56000080  Address size fault

Binary Images:
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       0x101058000 -        0x101093fff dyld_sim (*) <cc38080d-7c09-357a-b552-db1b456781ce> /Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 15.0.simruntime/Contents/Resources/RuntimeRoot/usr/lib/dyld_sim
       0x100750000 -        0x100a1ffff co.pointfree.Search (1.0) <2b456848-c867-3380-a86e-078be974106f> /Users/USER/Library/Developer/CoreSimulator/Devices/AC2344A6-3420-4BDF-87A5-9FA088C8849F/data/Containers/Bundle/Application/C615A1E2-3EF3-41F1-AD3C-931BE7B99F4A/Search.app/Search
       0x1010f0000 -        0x1010fbfff libobjc-trampolines.dylib (*) <a93817cc-8f74-3435-a719-034429e1417c> /Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 15.0.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libobjc-trampolines.dylib
       0x1c7f85000 -        0x1c7fbcfff libsystem_kernel.dylib (*) <f91811dc-efe8-3dfa-9553-71defa7ed45f> /usr/lib/system/libsystem_kernel.dylib
       0x180107000 -        0x180149fff libdispatch.dylib (*) <0d3a8420-f29e-3699-aa94-3597b8eca236> /Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 15.0.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/libdispatch.dylib
       0x1802cb000 -        0x180677fff com.apple.CoreFoundation (6.9) <6cbe5db0-f3ed-3227-a6b6-df5dbe7642aa> /Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 15.0.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
       0x18beff000 -        0x18bf07fff com.apple.GraphicsServices (1.0) <5de73649-0b11-3099-9a52-7ce3c01a8d93> /Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 15.0.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices
       0x184137000 -        0x1855b7fff com.apple.UIKitCore (1.0) <5cb38825-44d8-33eb-b2f4-90e8d179c29e> /Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 15.0.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore
       0x1b8a25000 -        0x1b97e4fff com.apple.SwiftUI (3.0.67.0.102) <9ea09c48-18ac-31b7-bb1a-12fa6e66f3f3> /Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 15.0.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/SwiftUI.framework/SwiftUI
       0x1c7fdc000 -        0x1c7fe8fff libsystem_pthread.dylib (*) <ba7c01fe-353b-3146-a7c6-f2bb8a0fa842> /usr/lib/system/libsystem_pthread.dylib
       0x1806ea000 -        0x1809a9fff com.apple.Foundation (6.9) <e14c8373-8298-3e74-afc5-61dddc413228> /Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 15.0.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/Foundation.framework/Foundation

EOF

-----------
Full Report
-----------

{"app_name":"Search","timestamp":"2023-09-13 09:35:17.00 +0700","app_version":"1.0","slice_uuid":"2b456848-c867-3380-a86e-078be974106f","build_version":"1","platform":7,"bundleID":"co.pointfree.Search","share_with_app_devs":0,"is_first_party":0,"bug_type":"309","os_version":"macOS 13.4 (22F66)","roots_installed":0,"name":"Search","incident_id":"36DB9CF2-9295-447C-B846-3CE86ADBDCA2"}
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Graphics: Apple M1 Pro, Apple M1 Pro, Built-In
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AirPort: spairport_wireless_card_type_wifi (0x14E4, 0x4387), wl0: Apr  7 2023 15:18:26 version 20.96.28.1.8.7.146 FWID 01-aff1b48a
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Thunderbolt Bus: MacBook Pro, Apple Inc.
Thunderbolt Bus: MacBook Pro, Apple Inc.
Thunderbolt Bus: MacBook Pro, Apple Inc.

Checklist

• I have determined whether this bug is also reproducible in a vanilla SwiftUI project.
• If possible, I've reproduced the issue using the main branch of this package.
• This issue hasn't been addressed in an existing GitHub issue or discussion.

Expected behavior

my application will not freeze when i open directly by tapping app icon in simulator

Actual behavior

My application freezes when start to send action to reducer, but it works well when i run my application via xcode Build & Run

Steps to reproduce

1. Download example project
   https://github.com/pointfreeco/swift-composable-architecture/tree/main/Examples/Search
2. Change Minimum Deployment to iOS 15.0
3. Build and run in Simulator 15.0
4. Close xcode and open the app again directly by tapping app icon in simulator
5. Start typing and it will freeze

The Composable Architecture version information

1.2.0

Destination operating system

iOS 15 Simulator

Xcode version information

Xcode 14.3.0

Swift Compiler version information

swift-driver version: 1.75.2 Apple Swift version 5.8 (swiftlang-5.8.0.124.2 clang-1403.0.22.11.100)
Target: arm64-apple-macosx13.0

[stephencelis]

@dwirandyh I can't reproduce this, which makes me think it's an Apple bug or local/temporary build issue, and not a bug with the library. I'm going to convert to a discussion for now, but if there's a reliable reproduction that points to an issue in TCA and not a more general bug in Apple's tools, please open another issue!

[jeffremer]

We are seeing a similar watchdog/0x8BADFOOD crash against iOS 15 in production where this release upgraded from [email protected] to 1.2.0. There's no smoking gun that highlights TCA specifically in the crash report, it looks basically the same as the one from @dwirandyh.

One clue pointing at TCA or maybe a SwiftUI/SwiftUI-adjacent bug in iOS versions 15.0 up to 15.1.1 inclusive is that one our QA folks was able to reproduce the crash starting with the TCA upgrade to 1.2 and it only occurs when she goes to a screen with a TCA feature. The app can launch fine otherwise to a UIKit/non-TCA screen.

Unfortunately while she can reproduce this reliably on an adhoc or release build she can't reproduce it on a debug build whether or not it is attached to the debugger and Xcode. I can't reproduce this myself against an iOS15 simulator.

[jeffremer]

A teammate was trying to reproduce this issue and he ended up finding out the root cause. He was running Xcode 14.3 and could reproduce it. I was on Xcode 14.3.1 when I couldn't. He checked the release notes for 14.3.1 and sure enough there's a note about a fix for a concurrency issue in iOS 15 through 15.1.1. So, @dwirandyh if you update to Xcode 14.3.1 this should be resolved for you as well.

[dwirandyh]

Hi @jeffremer thanks for your help, i have solved the issue by using iOS Simulator 15.2 i will also try to upgrade my xcode later 🙏