[Crash] after updating to sdk 12.14.0 - [GULNetworkURLSessionWeakHolder session]

[ganesh-oyo]

Description

To fix a GoogleUtilities crash introduced in SDK 12.13.0, we updated our firebase SDK version to 12.14.0.
Then, we again received a new crash with title "[GULNetworkURLSessionWeakHolder session]" with 2 variants.

Variant 1 Stacktrace -
Crashed: ODCConversionService
0 libobjc.A.dylib 0x647c objc_loadWeakRetained + 204
1 oyo-ios 0x1696d98 -[GULNetworkURLSessionWeakHolder session] + 32 (GULNetworkURLSession.m:32)
2 oyo-ios 0x16991a4 __60+[GULNetworkURLSession setSessionInFetcherMap:forSessionID:]_block_invoke + 704 (GULNetworkURLSession.m:704)
3 CoreFoundation 0x19464 NSDICTIONARY_IS_CALLING_OUT_TO_A_BLOCK + 24
4 CoreFoundation 0x19330 -[__NSDictionaryM enumerateKeysAndObjectsWithOptions:usingBlock:] + 356
5 oyo-ios 0x169906c +[GULNetworkURLSession setSessionInFetcherMap:forSessionID:] + 701 (GULNetworkURLSession.m:701)
6 oyo-ios 0x1697338 -[GULNetworkURLSession sessionIDFromAsyncPOSTRequest:completionHandler:] + 188 (GULNetworkURLSession.m:188)
7 oyo-ios 0x169592c -[GULNetwork postURL:headers:payload:queue:usingBackgroundSession:completionHandler:] + 159 (GULNetwork.m:159)
8 oyo-ios 0x19bec1c -[ODCGroupMatchFetcher executeTask] + 4357893148
9 oyo-ios 0x19b1d00 -[ODCAsyncTaskGroupInfo startTaskWithCompletion:] + 4357840128
10 oyo-ios 0x19b1e6c -[ODCAsyncTaskGroupInfo finishTaskWithError:] + 4357840492
11 oyo-ios 0x19ba4ec -[ODCGroupConfigFetcher handlePSMConfigResponse:data:error:] + 4357874924
12 oyo-ios 0x19ba2bc __36-[ODCGroupConfigFetcher executeTask]_block_invoke + 4357874364
13 libdispatch.dylib 0x19a8 _dispatch_call_block_and_release + 32
14 libdispatch.dylib 0x1b1e4 _dispatch_client_callout + 16
15 libdispatch.dylib 0x9fb0 _dispatch_lane_serial_drain + 740
16 libdispatch.dylib 0xaaac _dispatch_lane_invoke + 392
17 libdispatch.dylib 0x14dac _dispatch_root_queue_drain_deferred_wlh + 284
18 libdispatch.dylib 0x146ac _dispatch_workloop_worker_thread + 720
19 libsystem_pthread.dylib 0x13b0 _pthread_wqthread + 292
20 libsystem_pthread.dylib 0x8c0 start_wqthread + 8

Variant - 2 stacktrace
Crashed: com.google.fira.worker
0 libobjc.A.dylib 0x921c objc_loadWeakRetained + 180
1 oyo-ios 0x1696d98 -[GULNetworkURLSessionWeakHolder session] + 32 (GULNetworkURLSession.m:32)
2 oyo-ios 0x16991a4 __60+[GULNetworkURLSession setSessionInFetcherMap:forSessionID:]_block_invoke + 704 (GULNetworkURLSession.m:704)
3 CoreFoundation 0x24e54 + 24
4 CoreFoundation 0x24c98 + 288
5 oyo-ios 0x169906c +[GULNetworkURLSession setSessionInFetcherMap:forSessionID:] + 701 (GULNetworkURLSession.m:701)
6 oyo-ios 0x1697338 -[GULNetworkURLSession sessionIDFromAsyncPOSTRequest:completionHandler:] + 188 (GULNetworkURLSession.m:188)
7 oyo-ios 0x169592c -[GULNetwork postURL:headers:payload:queue:usingBackgroundSession:completionHandler:] + 159 (GULNetwork.m:159)
8 oyo-ios 0x193f058 -[APMMeasurement uploadData] + 4370411608
9 oyo-ios 0x193fa6c -[APMMeasurement networkUploadCompletionHandlerWithResponse:error:] + 4370414188
10 oyo-ios 0x193f400 __28-[APMMeasurement uploadData]_block_invoke.711 + 4370412544

Reproducing the issue

No response

Firebase SDK Version

12.14.0

Xcode Version

26.3

Installation Method

Swift Package Manager

Firebase Product(s)

Performance, All

Targeted Platforms

iOS

Relevant Log Output

**Variant 1 Stacktrace -** 
Crashed: ODCConversionService
0  libobjc.A.dylib                0x647c objc_loadWeakRetained + 204
1  oyo-ios                        0x1696d98 -[GULNetworkURLSessionWeakHolder session] + 32 (GULNetworkURLSession.m:32)
2  oyo-ios                        0x16991a4 __60+[GULNetworkURLSession setSessionInFetcherMap:forSessionID:]_block_invoke + 704 (GULNetworkURLSession.m:704)
3  CoreFoundation                 0x19464 __NSDICTIONARY_IS_CALLING_OUT_TO_A_BLOCK__ + 24
4  CoreFoundation                 0x19330 -[__NSDictionaryM enumerateKeysAndObjectsWithOptions:usingBlock:] + 356
5  oyo-ios                        0x169906c +[GULNetworkURLSession setSessionInFetcherMap:forSessionID:] + 701 (GULNetworkURLSession.m:701)
6  oyo-ios                        0x1697338 -[GULNetworkURLSession sessionIDFromAsyncPOSTRequest:completionHandler:] + 188 (GULNetworkURLSession.m:188)
7  oyo-ios                        0x169592c -[GULNetwork postURL:headers:payload:queue:usingBackgroundSession:completionHandler:] + 159 (GULNetwork.m:159)
8  oyo-ios                        0x19bec1c -[ODCGroupMatchFetcher executeTask] + 4357893148
9  oyo-ios                        0x19b1d00 -[ODCAsyncTaskGroupInfo startTaskWithCompletion:] + 4357840128
10 oyo-ios                        0x19b1e6c -[ODCAsyncTaskGroupInfo finishTaskWithError:] + 4357840492
11 oyo-ios                        0x19ba4ec -[ODCGroupConfigFetcher handlePSMConfigResponse:data:error:] + 4357874924
12 oyo-ios                        0x19ba2bc __36-[ODCGroupConfigFetcher executeTask]_block_invoke + 4357874364
13 libdispatch.dylib              0x19a8 _dispatch_call_block_and_release + 32
14 libdispatch.dylib              0x1b1e4 _dispatch_client_callout + 16
15 libdispatch.dylib              0x9fb0 _dispatch_lane_serial_drain + 740
16 libdispatch.dylib              0xaaac _dispatch_lane_invoke + 392
17 libdispatch.dylib              0x14dac _dispatch_root_queue_drain_deferred_wlh + 284
18 libdispatch.dylib              0x146ac _dispatch_workloop_worker_thread + 720
19 libsystem_pthread.dylib        0x13b0 _pthread_wqthread + 292
20 libsystem_pthread.dylib        0x8c0 start_wqthread + 8




**Variant  - 2 stacktrace** 
Crashed: com.google.fira.worker
0  libobjc.A.dylib                0x921c objc_loadWeakRetained + 180
1  oyo-ios                        0x1696d98 -[GULNetworkURLSessionWeakHolder session] + 32 (GULNetworkURLSession.m:32)
2  oyo-ios                        0x16991a4 __60+[GULNetworkURLSession setSessionInFetcherMap:forSessionID:]_block_invoke + 704 (GULNetworkURLSession.m:704)
3  CoreFoundation                 0x24e54 <redacted> + 24
4  CoreFoundation                 0x24c98 <redacted> + 288
5  oyo-ios                        0x169906c +[GULNetworkURLSession setSessionInFetcherMap:forSessionID:] + 701 (GULNetworkURLSession.m:701)
6  oyo-ios                        0x1697338 -[GULNetworkURLSession sessionIDFromAsyncPOSTRequest:completionHandler:] + 188 (GULNetworkURLSession.m:188)
7  oyo-ios                        0x169592c -[GULNetwork postURL:headers:payload:queue:usingBackgroundSession:completionHandler:] + 159 (GULNetwork.m:159)
8  oyo-ios                        0x193f058 -[APMMeasurement uploadData] + 4370411608
9  oyo-ios                        0x193fa6c -[APMMeasurement networkUploadCompletionHandlerWithResponse:error:] + 4370414188
10 oyo-ios                        0x193f400 __28-[APMMeasurement uploadData]_block_invoke.711 + 4370412544

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[Enjoyworld-AI]

I have the same problem。FirebaseAnalytics 12.12.1 + GoogleUtilities 8.1.1 + FirebasePerformance 12.12.0，

[Mountain-Tao]

I have the same problem. FirebaseAnalytics 11.15.0 + FirebasePerformance 11.15.0 + GoogleUtilities 8.1.1. The crashes all occurred on devices running iOS 26.5.

[agustindeleon7]

We have the same issue. This seems directly related to the changes made to GULNetworkURLSession in this release: https://github.com/google/GoogleUtilities/releases/tag/8.1.1.

Quick question: was your store release published after this specific GoogleUtilities version was available?

[Mountain-Tao]

When will this issue be resolved? The number of users experiencing crashes in the live environment keeps rising.

[ncooke3]

Hi everyone, the fix is now released as version 8.1.2. Thanks, @agustindeleon7, for contributing a fix!