A modern programming language that makes developers happier.

kotlinlang

Is there any R8 help/channel/forum? Is there any Kotlin 2.1 compatible (snapshot) version?

If you have issue you can use the Google tracker in the R8 part, they are by far the very best team in term of support, always answering, always fixing fast and taking time to explain when it's the user's fault. Praise R8 team and don't fear the tracker for them.
The last snapshot it 8.9.5-dev, there's plenty of issues to look for how to use that version.

You can search at
• <https://r8.googlesource.com/r8/+/refs/heads/main/d8_r8/commonBuildSrc/src/main/kotlin/DependenciesPlugin.kt#420>
• 
 <https://r8-review.googlesource.com/q/%22Kotlin+metadata%22>

Thank you. Yeah I noticed that the only reason is the older metadata library that’s only needed if you need to keep the metadata information. As a workaround I just removed the metadata information. 

And regarding help, R8 is way to smart and removed all my test code because I was too lazy and added a TODO in my test code that was called very early so the resulting R8 jar was totally empty. After fixing this TODO with real implementation, the minified jar was correct. 