Version 9.6.21 crashes in release mode with R8/ProGuard enabled

[Sergey04IO]

Android: 9.6.21 crashes in release mode with R8/ProGuard enabled

Description

After upgrading intercom_flutter from 9.6.20 to 9.6.21, the Android app started crashing in release mode.

The issue does not happen in debug mode.

Versions 9.6.19 and 9.6.20 work correctly with the same project configuration.

Environment

• Flutter: 3.44.8
• Android Gradle Plugin (AGP): 9.3.1
• Gradle: 9.5.0
• intercom_flutter: 9.6.21

Crash log

Caused by java.lang.IllegalArgumentException: Required value was null.
Fatal Exception: java.lang.ExceptionInInitializerError 
     at io.intercom.android.sdk.m5.data.IntercomDataLayer.activityReadyForViewAttachment(IntercomDataLayer.java:281) 
     at io.intercom.android.sdk.ActivityLifecycleHandler.handleMessage(ActivityLifecycleHandler.java:46) 
     at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loopOnce(Looper.java:201) 
     at android.os.Looper.loop(Looper.java:288) at android.app.ActivityThread.main(ActivityThread.java:7870) 
     at java.lang.reflect.Method.invoke(Method.java) 
     at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1009)

What I tested

• intercom_flutter 9.6.19 — works
• intercom_flutter 9.6.20 — works
• intercom_flutter 9.6.21 in debug mode — works
• intercom_flutter 9.6.21 in release mode — crashes

Workaround

Adding these rules to the ProGuard/R8 configuration fixes the crash:

-keep class io.intercom.android.** { *; }
-dontwarn io.intercom.android.**

After adding these rules, 9.6.21 works correctly in release mode.

It looks like this may be related to the R8/ProGuard consumer rules in the Android Intercom SDK used by intercom_flutter 9.6.21.

Could you please check if some required ProGuard/R8 rules are missing in 9.6.21?

Ideally, it should not be necessary to keep the entire io.intercom.android package manually.

[deepak786]

@Sergey04IO Coud you please share the device details?

• Android device model(s)
• Android OS version(s)

It will be helpful to resolve the issue.