Sentry iOS SDK Session Replay Crash on iOS 26 Beta #6198
Description
Platform
iOS
Environment
Develop
Installed
Swift Package Manager
Version
8.56.0
Xcode Version
16.x (latest)
Did it work on previous versions?
first time trying this
Steps to Reproduce
```swift
SentrySDK.start { options in
options.dsn = "https://[redacted]@o4510043461058560.ingest.us.sentry.io/4510043476393984"
options.environment = "development"
// Performance monitoring
options.tracesSampleRate = 1.0
options.enableTracing = true
// Session Replay
options.sessionReplay.sessionSampleRate = 1.0
options.sessionReplay.onErrorSampleRate = 1.0
options.sessionReplay.maskAllText = true
options.sessionReplay.maskAllImages = true
}
```
## Reproduction Steps
1. Configure Sentry SDK with Session Replay enabled (as shown above)
2. Run app on iOS 26.0 beta simulator
3. Navigate through any screen in the app
4. Wait ~5 seconds for the replay to attempt sending
5. App crashes with unrecognized selector error
Expected Result
Session Replay should successfully capture and send replay segments to Sentry without crashing.
Actual Result
### Error Message
```
*** Terminating app due to uncaught exception 'NSInvalidArgumentException',
reason: '-[Sentry.SentryReplayRecording data]: unrecognized selector sent to instance 0x600000da4090'
```
### Stack Trace (Key Frames)
```
5 TrackRat.debug.dylib 0x00000001025bb190 $sSo16SentryAttachmentC4data10Foundation4DataVSgvgToTepb_Tm + 32
6 TrackRat.debug.dylib 0x00000001025ba7b4
$s6Sentry0A12EnvelopeItemC11replayEvent0D9Recording5videoACSgAA0a6ReplayE0C_AA0ahF0C10Foundation3URLVtcfc + 364
7 TrackRat.debug.dylib 0x00000001025bae38
$s6Sentry0A12EnvelopeItemC11replayEvent0D9Recording5videoACSgAA0a6ReplayE0C_AA0ahF0C10Foundation3URLVtcfcTo + 120
8 TrackRat.debug.dylib 0x00000001024bd260 -[SentryClient captureReplayEvent:replayRecording:video:withScope:] + 180
9 TrackRat.debug.dylib 0x00000001024e0704 -[SentryHub captureReplayEvent:replayRecording:video:] + 132
10 TrackRat.debug.dylib 0x000000010253873c -[SentrySessionReplayIntegration sessionReplayNewSegmentWithReplayEvent:replayRecording:videoUrl:] + 288
```
### Debug Logs Before Crash
```
[Sentry] [debug] [Session Replay] Finished rendering video, frame count moved to: 5
[Sentry] [debug] [Session Replay] Finished creating video with 1 segments
[Sentry] [debug] [Session Replay] Created replay video with 1 segments
[Sentry] [debug] [Session Replay] Processing new segment available for replayType: session
[Sentry] [debug] [Session Replay] Capturing segment: 0, replayId: 9fd24cfbe9744441bfb93ff4913d2e7a
[Sentry] [debug] [Session Replay] Converting breadcrumbs from: 2025-09-19 02:05:26 +0000 until: 2025-09-19 02:05:31 +0000
[Sentry] [debug] [Session Replay] New segment with replay event, eventId: 9fd24cfbe9744441bfb93ff4913d2e7a, segmentId: 0
I'm currently disabling Session Replay to prevent crashes:
swift // Commented out until iOS 26 compatibility is resolved // options.sessionReplay.sessionSampleRate = 1.0 // options.sessionReplay.onErrorSampleRate = 1.0
Are you willing to submit a PR?
No response