Koin 3.5.4 and onwards is no longer Java 1.8 compatible

[antonurankar-moloco]

Describe the bug

With the release of Koin 3.5.4, its transitive dependency stately has been upgraded to version 2.0.6, which is no longer Java 1.8 compatible.

 Could not resolve all files for configuration ':app:debugRuntimeClasspath'.
   > Failed to transform stately-concurrent-collections-jvm-2.0.6.jar (co.touchlab:stately-concurrent-collections-jvm:2.0.6) to match attributes {artifactType=android-java-res, org.gradle.category=library, org.gradle.libraryelements=jar, org.gradle.status=release, org.gradle.usage=java-runtime, org.jetbrains.kotlin.platform.type=jvm}.
      > Execution failed for JetifyTransform: /Users/tomi/.gradle_console/caches/modules-2/files-2.1/co.touchlab/stately-concurrent-collections-jvm/2.0.6/fb80df9c69dd0e154c346ee5510601e2d148e23d/stately-concurrent-collections-jvm-2.0.6.jar.
         > Failed to transform '/Users/tomi/.gradle_console/caches/modules-2/files-2.1/co.touchlab/stately-concurrent-collections-jvm/2.0.6/fb80df9c69dd0e154c346ee5510601e2d148e23d/stately-concurrent-collections-jvm-2.0.6.jar' using Jetifier. Reason: IllegalArgumentException, message: Unsupported class file major version 61. (Run with --stacktrace for more details.)
           Suggestions:
            - Check out existing issues at https://issuetracker.google.com/issues?q=componentid:460323&s=modified_time:desc, it's possible that this issue has already been filed there.
            - If this issue has not been filed, please report it at https://issuetracker.google.com/issues/new?component=460323 (run with --stacktrace and provide a stack trace if possible).
   > Failed to transform stately-concurrency-jvm-2.0.6.jar (co.touchlab:stately-concurrency-jvm:2.0.6) to match attributes {artifactType=android-java-res, org.gradle.category=library, org.gradle.libraryelements=jar, org.gradle.status=release, org.gradle.usage=java-runtime, org.jetbrains.kotlin.platform.type=jvm}.
      > Execution failed for JetifyTransform: /Users/tomi/.gradle_console/caches/modules-2/files-2.1/co.touchlab/stately-concurrency-jvm/2.0.6/14dcbce3fc3d80a5a07f9df33dd2dc54e437e8d0/stately-concurrency-jvm-2.0.6.jar.
         > Failed to transform '/Users/tomi/.gradle_console/caches/modules-2/files-2.1/co.touchlab/stately-concurrency-jvm/2.0.6/14dcbce3fc3d80a5a07f9df33dd2dc54e437e8d0/stately-concurrency-jvm-2.0.6.jar' using Jetifier. Reason: IllegalArgumentException, message: Unsupported class file major version 61. (Run with --stacktrace for more details.)
           Suggestions:
            - Check out existing issues at https://issuetracker.google.com/issues?q=componentid:460323&s=modified_time:desc, it's possible that this issue has already been filed there.
            - If this issue has not been filed, please report it at https://issuetracker.google.com/issues/new?component=460323 (run with --stacktrace and provide a stack trace if possible).
   > Failed to transform stately-strict-jvm-2.0.6.jar (co.touchlab:stately-strict-jvm:2.0.6) to match attributes {artifactType=android-java-res, org.gradle.category=library, org.gradle.libraryelements=jar, org.gradle.status=release, org.gradle.usage=java-runtime, org.jetbrains.kotlin.platform.type=jvm}.
      > Execution failed for JetifyTransform: /Users/tomi/.gradle_console/caches/modules-2/files-2.1/co.touchlab/stately-strict-jvm/2.0.6/fdbcb1fc1c9219aa5a5f2b1c9084a4ed8b2a8f8b/stately-strict-jvm-2.0.6.jar.
         > Failed to transform '/Users/tomi/.gradle_console/caches/modules-2/files-2.1/co.touchlab/stately-strict-jvm/2.0.6/fdbcb1fc1c9219aa5a5f2b1c9084a4ed8b2a8f8b/stately-strict-jvm-2.0.6.jar' using Jetifier. Reason: IllegalArgumentException, message: Unsupported class file major version 61. (Run with --stacktrace for more details.)
           Suggestions:
            - Check out existing issues at https://issuetracker.google.com/issues?q=componentid:460323&s=modified_time:desc, it's possible that this issue has already been filed there.
            - If this issue has not been filed, please report it at https://issuetracker.google.com/issues/new?component=460323 (run with --stacktrace and provide a stack trace if possible).

To Reproduce

Compile Koin 3.5.4+ with Gradle version 6.x and build will fail with error: Unsupported class file major version 61

Expected behavior

Koin should still support Java 1.8. Otherwise mention in the documentation that the support has been dropped.

Koin module and version:
koin-core:3.5.4+
koin-android:3.5.4+

[arnaudgiuliani]

Contacting touchlab team 👍

[faogustavo]

Hey folks, we've released version 2.1.0 for Stately, which includes this fix. Please let us know if the problem persists.

Thanks :)

[arnaudgiuliani]

Hey @faogustavo, thanks for the update 👍