Hello! I have a few depencies in my Android proje...

# coroutines

[int02h]

Hello!

I have a few depencies in my Android project which transitively depends on kotlin-coroutines-core different versions. I’ve used resolutionStrategy Gradle feature to force using the same 1.4.3 version of coroutines but during release build I get the R8 (ProGuard) error like:

ERROR:/Users/*****/***********/app/build/intermediates/module_and_runtime_deps_classes/preliveGooglePlayRelease/base.jar: R8: Type kotlinx.coroutines.debug.AgentPremain is defined multiple times: /Users/*****/***********/app/build/intermediates/module_and_runtime_deps_classes/preliveGooglePlayRelease/base.jar:kotlinx/coroutines/debug/AgentPremain.class, /Users/*****/***********/voip_ui/build/intermediates/module_and_runtime_deps_classes/preliveGooglePlayRelease/feature-voip_ui.jar:kotlinx/coroutines/debug/AgentPremain.class

As I see AgentPremain indeed contained in both kotlin-coroutines-core and kotlin-coroutines-core-jvm with sligtly different byte code. The interesting thing is that kotlin-coroutines-core introduces the dependency to kotlin-coroutines-core-jvm according to Gradle dependency graph:

+--- org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.7 -> 1.4.3
|    \--- org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm:1.4.3

and the POM file says the same:

<dependency>
	<groupId>org.jetbrains.kotlinx</groupId>
	<artifactId>kotlinx-coroutines-core-jvm</artifactId>
	<version>1.4.3</version>
	<scope>compile</scope>
</dependency>

I wonder how two dependent libraries could have the same class but with different code inside them? Maybe I do something wrong?

[louiscad]

Look at Gradle metadata (.module files), not the pom, they take precedence.

[int02h]

Solved. That’s was an issue in my Gradle configuration for Android dynamic features.