ANR before crash when SentryOptions.BeforeSendCallback returns null

[michal-chojnacki]

Integration

sentry-android

Build System

Gradle

AGP Version

7.4

Proguard

Disabled

Version

5.7.4

Steps to Reproduce

1. Create new blank project.
2. Add sentry library
3. Add AndroidManifest integration code
4. Add config to build.gradle file:

sentry {
    tracingInstrumentation {
        enabled.set(false)
    }
    autoInstallation {
        enabled.set(false)
    }
}

5. Run Sentry config in Application file:

    override fun onCreate() {
        super.onCreate()
        SentryAndroid.init(this, loggingOptions())
    }

    private fun loggingOptions() =
        Sentry.OptionsConfiguration<SentryAndroidOptions> { options ->
            options.beforeSend = SentryOptions.BeforeSendCallback { event, _ ->
                null
            }
        }

6. Build project
7. Run something which will throw unhandled exception

Expected Result

App should crash immediately

Actual Result

When unhandled exception happens UI freezes for few secs, ANR is shown and crash happens after some time.

Everything works correctly until v5.7.3. After bumping when SentryOptions.BeforeSendCallback returns null then we have ANR for few seconds before crash. When SentryOptions.BeforeSendCallback is returning some event then it also works correctly (crashing immediately).

[romtsn]

hey, sorry for the troubles and thanks for the detailed report, we'll take a look at it soon and try to reproduce.

[romtsn]

found the cause - the fix is on its way and we'll try to ship it this or next week. Thanks for nailing down the version where it's started to pop up 👍