NSInvalidArgumentException - -[DatadogRUM.UIScrollViewDelegateProxy scrollViewDidScroll:]: unrecognized selector sent to instance

[ashman09]

Stack trace

We are using 3.10.0 SPM.

Reproduction steps

com.shaadi.iphone_issue_49a18ab8433052b243527542acbf01dd_crash_session_9328e0a8d016407bad72cf5b9159bc7c_DNE_1_v2_stacktrace.txt

Volume

4 events 3 users

Affected SDK versions

3.10.0

Latest working SDK version

3.10.0

Does the crash manifest in the latest SDK version?

Yes

Deployment Target

iOS 16, iPhone

Device Information

No response

Other relevant information

No response

[gonzalezreal]

Hi @ashman09, thanks for the report and the stack trace.

This looks very similar to a UIScrollViewDelegateProxy crash we fixed in #2776, which was released in 3.8.3 and is included in 3.10.0.

From the stack trace, UIKit appears to call scrollViewDidScroll: on our delegate proxy while a UICollectionView is being removed during view/controller deallocation. One possible explanation is that UIKit previously cached that the delegate responds to this selector, but during teardown the original delegate is already deallocating. In that state, the proxy may still be alive, while its weak reference to the original delegate already reads as nil, so the proxy can no longer forward the call.

Could you please double-check that the app build producing this crash is definitely using 3.10.0? We would like to rule out a stale/resolved SDK version before investigating this as a new remaining edge case.

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity and has the awaiting-response label.

It will be closed if no further activity occurs within 3 days.