Hi, I'm trying to build an APK that uses coroutine...

# coroutines

[igorvd]

Hi, I'm trying to build an APK that uses coroutines... I'm getting an Error while generating the main dex list

Running with the stacktrace, I can see that this is the cause:

Caused by: com.android.tools.r8.errors.CompilationError: Program type already present: kotlinx.coroutines.experimental.AbstractContinuation
	at com.android.tools.r8.utils.ProgramClassCollection.resolveClassConflictImpl(ProgramClassCollection.java:64)
	at com.android.tools.r8.utils.ProgramClassCollection.lambda$create$0(ProgramClassCollection.java:25)
	at java.util.concurrent.ConcurrentHashMap.merge(ConcurrentHashMap.java:1990)
	at com.android.tools.r8.utils.ProgramClassCollection.create(ProgramClassCollection.java:24)
	at com.android.tools.r8.graph.LazyLoadedDexApplication$Builder.build(LazyLoadedDexApplication.java:124)
	at com.android.tools.r8.dex.ApplicationReader.read(ApplicationReader.java:123)
	at com.android.tools.r8.dex.ApplicationReader.read(ApplicationReader.java:86)
	at com.android.tools.r8.GenerateMainDexList.run(GenerateMainDexList.java:41)
	at com.android.tools.r8.GenerateMainDexList.run(GenerateMainDexList.java:111)
	at com.android.builder.multidex.D8MainDexList.generate(D8MainDexList.java:83)
	... 56 more

Searching for jars that contains the AbstractContinuation, I can see that is present in:

org.jetbrains.kotlinx:kotlin-coroutines-core:0.25.0
org.jetbrains.kotlinx:kotlin-coroutines-core-common:0.25.0


But my only dependency in build.gradle is: org.jetbrains.kotlinx:kotlinx-coroutines-android:0.25.0

I've notice that going back to version 0.23.4 fixed the problem. Maybe it's a bug with the version 0.25.0. I can't test using the 0.24.0, because I need the runBlocking in some parts.

[dekans]

This is a building option not supported by Android build tools.
https://github.com/Kotlin/kotlinx.coroutines/issues/510

No solution for now 😕 (exeption trying with AGP 3.3 which still is alpha)

[igorvd]

😞 But I'm already using the AGP 3.3.0-alpha05, AS 3.3 canary and gradle 4.9..

Maybe I should stick with the 0.23.4 for a while...

[dekans]

It seems that you need R8 to be enabled un your gradle.properties

From the comments of this issue.

I stick to v0.24 until we have a fix 😞

[igorvd]

I've checked with the r8 enabled 😕 Same problem