Missing classes detected while running R8.

[stranger11]

Describe the bug

In release version catching:
Missing classes detected while running R8
Missing class java.beans.ConstructorProperties (referenced from: void com.fasterxml.jackson.databind.ext.Java7SupportImpl.())
Missing class java.beans.Transient (referenced from: void com.fasterxml.jackson.databind.ext.Java7SupportImpl.())

Expected behavior

No problems with R8 and shrinking.

Steps to reproduce the bug

1. implementation 'org.xmtp:android:0.7.6'
2. Build release

[nplasterer]

👋 I recently saw this error when trying to bump us to Java 17 #158
Can you tell me more information about your project are you on AGP 8? Try downgraded to a version of AGP 7 which is what the project is setup with.

[stranger11]

@nplasterer The project uses quite a few dependencies that require AGP8. What other options are there?

[nplasterer]

Ya it's not very easy to support two AGP versions and it probably makes sense for us to just move to the latest. I'm giving a heads up to any current production integrators and then will merge #158 by Monday.

[nplasterer]

This should be going out in the latest release https://github.com/xmtp/xmtp-android/actions/runs/7792254501

[stranger11]

@nplasterer last version 0.7.10 didn't resolve problem..

[nplasterer]

@fabriguespe do you mind looking into this?

[humanagent]

@nplasterer I was able to reproduce the error if the minifyEnabled is set to true setting in the build.gradle file of the example module.

buildTypes {
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }

When minifyEnabled is set to true in the example module's build.gradle file, the build fails with the "Missing classes detected while running R8" error. However, if minifyEnabled is set to true only in the root build.gradle file, the build completes successfully.

Here's the error log I encountered when minifyEnabled was set to true in the example module:

> Task :example:minifyReleaseWithR8 FAILED
ERROR: Missing classes detected while running R8. Please add the missing classes or apply additional keep rules that are generated in /Users/fabrizioguespe/DevRel/xmtp-android/example/build/outputs/mapping/release/missing_rules.txt.
ERROR: R8: Missing class java.beans.ConstructorProperties (referenced from: void com.fasterxml.jackson.databind.ext.Java7SupportImpl.<init>())
Missing class java.beans.Transient (referenced from: void com.fasterxml.jackson.databind.ext.Java7SupportImpl.<init>())

@stranger11 has reported in Discord that if he sets minifyEnabled to false the build runs successfully.

Versions

• Gradle version 8.1.1 or 8.0
• Java version 17.0.9 installed

Run command

./gradlew assembleRelease

[nplasterer]

Awesome thanks for reproducing I'll see what we can do to fix this for minifyed builds