release build - R8 reports Missing class com.google.firebase.messaging.TopicOperation$TopicOperations

[READ] Step 1: Are you in the right place?

Issues filed here should be about bugs in the code in this repository. If you have a general question, need help debugging, or fall into some other category use one of these other channels:

• For general technical questions, post a question on StackOverflow with the firebase tag.
• For general Firebase discussion, use the firebase-talk google group.
• For help troubleshooting your application that does not fall under one of the above categories, reach out to the personalized Firebase support channel.

[REQUIRED] Step 2: Describe your environment

• Android Studio version: gradle plugin 7.0.4 (that’s the thing that contains R8)
• Firebase Component: Messaging
• Component version: BoM 30.0.1

[REQUIRED] Step 3: Describe the problem

Steps to reproduce:

Do a release build that includes messaging, on android, with proguard / code shrinking enabled

Relevant Code:

Again, with a code shrink issue I don’t think code is required, I think that you only need to include the library (like in a quickstart) and then build for release

> Task :app:minifyProdReleaseWithR8
WARNING:Missing classes detected while running R8. Please add the missing classes or apply additional keep rules that are generated in /Users/mike/work/Kullki/ksocialscore/packages/public-app/android/app/build/outputs/mapping/prodRelease/missing_rules.txt.

WARNING:R8: Missing class com.google.firebase.messaging.TopicOperation$TopicOperations (referenced from: void com.google.firebase.messaging.TopicOperation.<init>(java.lang.String, java.lang.String))

I don’t see a proguard-rules.pro file in the source tree here so I can’t say for certain if it is incorrect rules, or just that there should be a proguard file and there isn’t one at all

[mikehardy]

Fantastic! Thank you 😃 - I was actually responding to original version of comment when github helpfully async-updated the page as I was typing. Cheers

[argzdev]

Sorry! I’ve overlooked this from the script file you’ve provided.

EDIT: It passed, but I see the issue now.

> Task :app:minifyReleaseWithR8
AGPBI: {"kind":"warning","text":"Missing classes detected while running R8. Please add the missing classes or apply additional keep rules that are generated in /Users/alvinrustan/Desktop/test_folder/rnfbdemo/android/app/build/outputs/mapping/release/missing_rules.txt.\n","sources":[{}]}
AGPBI: {"kind":"warning","text":"Missing class com.google.firebase.messaging.TopicOperation$TopicOperations (referenced from: void com.google.firebase.messaging.TopicOperation.<init>(java.lang.String, java.lang.String))","sources":[{}],"tool":"R8"}

Thanks for the extra details you’ve provided, I’ll notify an engineer to see what we can do here.