Use of certain GameKit APIs cause crash when running an iOS app on Mac

[kiddkaffeine]

Description

Use of certain GameKit APIs when running iOS apps on Mac can cause a crash.

Reproduction Steps

GKLocalPlayer player = GKLocalPlayer.LocalPlayer;
player.AuthenticateHandler = (vc, err) => {

Attempting to use AuthenticateHandler runs fine on an iOS device, but when the app is run on a Mac -- via TestFlight or the App Store, unsure if there's a way to do it otherwise -- this causes a crash; the provided handler is never called.

Expected behavior

No crash.

Actual behavior

Crash. I have consistently replicated this testing on a Mac via TestFlight, but never on an iOS device. The thread crash log looks as follows:

Thread 9 Crashed::  Dispatch queue: com.apple.NSXPCConnection.m-user.com.apple.gamed
0   libsystem_kernel.dylib        	       0x1941b2a60 __pthread_kill + 8
1   libsystem_pthread.dylib       	       0x1941eac20 pthread_kill + 288
2   libsystem_c.dylib             	       0x1940f7a30 abort + 180
3   <redacted app name>            	       0x102b39380 sigabrt_signal_handler.cold.1 + 48 (mini-posix.c:226)
4   <redacted app name>            	       0x102af4b44 sigabrt_signal_handler + 196 (mini-posix.c:224)
5   libsystem_platform.dylib      	       0x19421b584 _sigtramp + 56
6   libsystem_pthread.dylib       	       0x1941eac20 pthread_kill + 288
7   libsystem_c.dylib             	       0x1940f7a30 abort + 180
8   libsystem_malloc.dylib        	       0x194007dc4 malloc_vreport + 896
9   libsystem_malloc.dylib        	       0x19400b430 malloc_report + 64
10  libsystem_malloc.dylib        	       0x194025494 find_zone_and_free + 528
11  libicucore.A.dylib            	       0x197367edc icu::Locale::setToBogus() + 52
12  libicucore.A.dylib            	       0x197368240 icu::Locale::operator=(icu::Locale const&) + 40
13  libicucore.A.dylib            	       0x1974cdd08 icu::number::LocalizedNumberFormatter::LocalizedNumberFormatter(icu::number::impl::MacroProps&&, icu::Locale const&) + 216
14  libicucore.A.dylib            	       0x19746f7c0 icu::DecimalFormat::touch(UErrorCode&) + 240
15  libicucore.A.dylib            	       0x197470024 icu::DecimalFormat::DecimalFormat(icu::UnicodeString const&, icu::DecimalFormatSymbols*, UNumberFormatStyle, UErrorCode&) + 380
16  libicucore.A.dylib            	       0x1974eb718 icu::NumberFormat::makeInstance(icu::Locale const&, UNumberFormatStyle, signed char, UErrorCode&) + 1668
17  libicucore.A.dylib            	       0x1974eaec8 icu::LocaleCacheKey<icu::SharedNumberFormat>::createObject(void const*, UErrorCode&) const + 88
18  libicucore.A.dylib            	       0x1973f2d08 icu::UnifiedCache::_get(icu::CacheKeyBase const&, icu::SharedObject const*&, void const*, UErrorCode&) const + 168
19  libicucore.A.dylib            	       0x1974ebcd8 0x197348000 + 1719512
20  libicucore.A.dylib            	       0x1974eb034 0x197348000 + 1716276
21  libicucore.A.dylib            	       0x1974ea930 icu::NumberFormat::createInstance(icu::Locale const&, UNumberFormatStyle, UErrorCode&) + 112
22  libicucore.A.dylib            	       0x19753a4bc icu::SimpleDateFormat::initialize(icu::Locale const&, UErrorCode&) + 572
23  libicucore.A.dylib            	       0x197539f04 icu::SimpleDateFormat::construct(icu::DateFormat::EStyle, icu::DateFormat::EStyle, icu::Locale const&, UErrorCode&) + 2024
24  libicucore.A.dylib            	       0x19753b234 icu::SimpleDateFormat::SimpleDateFormat(icu::DateFormat::EStyle, icu::DateFormat::EStyle, icu::Locale const&, UErrorCode&) + 252
25  libicucore.A.dylib            	       0x197462254 icu::DateFormat::create(icu::DateFormat::EStyle, icu::DateFormat::EStyle, icu::Locale const&) + 172
26  libicucore.A.dylib            	       0x197571fac udat_open + 396
27  CoreFoundation                	       0x1943074a0 __cficu_udat_open + 72
28  CoreFoundation                	       0x194306854 __ResetUDateFormat + 516
29  CoreFoundation                	       0x194306624 __CreateCFDateFormatter + 324
30  CoreFoundation                	       0x194306344 -[NSDate descriptionWithLocale:] + 392
31  GameCenterFoundation          	       0x239ec1de8 -[NSObject(PrintDebugging) _gkDescription] + 32
32  GameCenterFoundation          	       0x239ec1e94 -[NSObject(PrintDebugging) _gkDescriptionWithChildren:] + 84
33  GameCenterFoundation          	       0x239eb6c44 -[GKInternalRepresentation _gkDescriptionWithChildren:] + 1328
34  CoreFoundation                	       0x1942b33dc -[NSArray descriptionWithLocale:indent:] + 492
35  Foundation                    	       0x1953c0eac _NS_os_log_callback + 284
36  libsystem_trace.dylib         	       0x193f3cc5c _os_log_fmt_flatten_NSCF + 64
37  libsystem_trace.dylib         	       0x193f3c6c0 _os_log_fmt_flatten_object + 220
38  libsystem_trace.dylib         	       0x193f3a394 _os_log_impl_flatten_and_send + 1864
39  libsystem_trace.dylib         	       0x193f39c34 _os_log + 168
40  libsystem_trace.dylib         	       0x193f39b84 _os_log_impl + 28
41  GameCenterFoundation          	       0x239ede2e8 +[GKLocalPlayer authenticatedLocalPlayersDidChange:complete:] + 264
42  GameCenterFoundation          	       0x239f2a348 -[GKDaemonProxy authenticatedPlayersDidChange:authenticatingBundleID:reply:] + 140
43  CoreFoundation                	       0x1942aa694 __invoking___ + 148
44  CoreFoundation                	       0x1942aa514 -[NSInvocation invoke] + 428
45  GameCenterFoundation          	       0x239e9cf04 -[NSInvocation(GKProxyHelpers) _gkInvokeOnce] + 24
46  GameCenterFoundation          	       0x239e9ceb4 -[GKDaemonProxy connection:handleInvocation:isReply:] + 716
47  Foundation                    	       0x195c1ed08 -[NSXPCConnection _decodeAndInvokeMessageWithEvent:reply:flags:] + 1120
48  Foundation                    	       0x195c20558 message_handler_message + 88
49  Foundation                    	       0x1953c0ad4 message_handler + 152
50  libxpc.dylib                  	       0x193ef8f74 _xpc_connection_call_event_handler + 144
51  libxpc.dylib                  	       0x193ef76e8 _xpc_connection_mach_event + 1404
52  libdispatch.dylib             	       0x19403a4a8 _dispatch_client_callout4 + 20
53  libdispatch.dylib             	       0x194056888 _dispatch_mach_msg_invoke + 468
54  libdispatch.dylib             	       0x194041898 _dispatch_lane_serial_drain + 368
55  libdispatch.dylib             	       0x1940575d8 _dispatch_mach_invoke + 444
56  libdispatch.dylib             	       0x194041898 _dispatch_lane_serial_drain + 368
57  libdispatch.dylib             	       0x194042578 _dispatch_lane_invoke + 432
58  libdispatch.dylib             	       0x19404d2d0 _dispatch_root_queue_drain_deferred_wlh + 288
59  libdispatch.dylib             	       0x19404cb44 _dispatch_workloop_worker_thread + 404
60  libsystem_pthread.dylib       	       0x1941e700c _pthread_wqthread + 288
61  libsystem_pthread.dylib       	       0x1941e5d28 start_wqthread + 8

Regression?

Unknown.

Known Workarounds

No response

Configuration

Tested on an M3 running MacOS 14.5 and iOS devices with 17.5.1.

Other information

Log appears similar to the one reported in #98941

However, reinstalling .net 8 did not help.

% dotnet --version
8.0.301
% dotnet workload list

Installed Workload Id      Manifest Version       Installation Source
---------------------------------------------------------------------
macos                      14.2.8053/8.0.100      SDK 8.0.300        
ios                        17.2.8053/8.0.100      SDK 8.0.300        
tvos                       17.2.8053/8.0.100      SDK 8.0.300        
android                    34.0.95/8.0.100        SDK 8.0.300        

Use `dotnet workload search` to find additional workloads to install.

[filipnavara]

The looks like the same issue as #98941 which was already fixed in a servicing update.

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/area-system-globalization
See info in area-owners.md if you want to be subscribed.

[kiddkaffeine]

@filipnavara As noted in the ticket description, however it still appears to be an issue even with the latest dotnet 8 release.

[filipnavara]

Did you read all the comments? #98941 (comment) has the diagnostic steps.

[tarekgh]

CC @vitek-karas

[matouskozak]

@filipnavara As noted in the ticket description, however it still appears to be an issue even with the latest dotnet 8 release.

@kiddkaffeine are you still encountering the issue? If so, could you please try the step at #98941 (comment) and let us know if that helped.

[kiddkaffeine]

@matouskozak still an issue, we don't use Maui so there's not a lot of Nuget content to clear, and upgrading dotnet did not help either.

We interface with a couple of other native libraries and have to use some different settings as documented in xamarin/xamarin-macios#19624, maybe that's why?

[ivanpovazan]

Can you maybe provide a binary build log (binlog) of your build?
https://github.com/xamarin/xamarin-macios/wiki/Diagnosis#binary-build-logs