iOS crash -[SentryLog count]: unrecognized selector when beforeSendLog is set and the native SDK emits a log #6842

Environment

• @sentry/react-native 8.29.0 (sentry-cocoa 9.30.0, prebuilt xcframework)
• React Native 0.86.3, New Architecture / bridgeless, Hermes, Expo SDK 57
• iOS 18.7 (iPhone XR), Release build
• Worked on 7.11.0 with the same configuration

Steps to reproduce

1. Sentry.init({ dsn, enableLogs: true, beforeSendLog: (log) => log })
2. Emit a log from the native side, e.g. from a native module in Swift: SentrySDK.logger.info("hello")
3. The app crashes as soon as the native logger processes the log.

Actual result

*** Terminating app due to uncaught exception 'RCTFatalException: NSException:
-[Sentry.SentryLog count]: unrecognized selector sent to instance 0x126189400
  ...
  React  facebook::react::TurboModuleConvertUtils::convertJSIFunctionToCallback(...)
  React  facebook::react::AsyncCallback<>::callWithFunction(...)

Expected result

No crash. The native log is sent, or at least ignored by the JS beforeSendLog.

Cause

NATIVE.initNativeSdk in packages/core/src/js/wrapper.ts strips the callbacks that native cannot run: beforeSend, beforeBreadcrumb, beforeSendTransaction and beforeSendMetric. It doesn't strip beforeSendLog (nor beforeSendSpan). So the JS function crosses the bridge as an RCTResponseSenderBlock, which takes an NSArray *. sentry-cocoa 9 reads beforeSendLog from the options dictionary and calls the block with a SentryLog, and the block calls -count on it.

Suggested fix

Add beforeSendLog and beforeSendSpan to the destructured and stripped keys in initNativeSdk. We applied that with patch-package, and the crash is gone:

-const { beforeSend, beforeBreadcrumb, beforeSendTransaction, beforeSendMetric, integrations, ...
+const { beforeSend, beforeBreadcrumb, beforeSendTransaction, beforeSendMetric, beforeSendLog, beforeSendSpan, integrations, ...

Related: #5158 (running beforeSendLog on native logs).