Kover 0.9.7 incompatible with Kotlin 2.3.10 - "No matching variant" for kotlin-stdlib

[yonatankarp]

Description

When using Kover 0.9.7 with Kotlin 2.3.10, the build fails with a "No matching variant" error when resolving kotlin-stdlib for the koverExternalArtifacts configuration.

Environment

• Kover version: 0.9.7
• Kotlin version: 2.3.10
• Gradle version: 9.3.1
• Project type: Kotlin Multiplatform with JVM modules

Error Message

Could not resolve all files for configuration ':koverExternalArtifacts'.
> Could not resolve org.jetbrains.kotlin:kotlin-stdlib:2.3.10.
  Required by:
      root project 'ff4k' > project :ff4k-store-sql-common
   > No matching variant of org.jetbrains.kotlin:kotlin-stdlib:2.3.10 was found. 
     The consumer was configured to find attribute 'kotlinx.kover.variant.name' with value '', 
     attribute 'kotlinx.kover.variant.origin' with value 'TOTAL', 
     attribute 'org.gradle.usage' with value 'kover' but:
       - Variant 'jvmApiElements':
           - Incompatible because this component declares attribute 'org.gradle.usage' 
             with value 'java-api' and the consumer needed attribute 'org.gradle.usage' 
             with value 'kover'
       ...

The error occurs because Kover is looking for a variant with org.gradle.usage = 'kover', but kotlin-stdlib:2.3.10 does not expose any variants with this attribute.

Steps to Reproduce

1. Create a Kotlin JVM module in a multi-module project
2. Apply Kover 0.9.7 to the root project
3. Use Kotlin 2.3.10
4. Run ./gradlew koverXmlReport

Workaround

Excluding the affected module from Kover resolves the issue:

dependencies {
    subprojects
        .filter { it.name.startsWith("my-") }
        .filter { "my-problematic-module" !in it.name }  // Workaround
        .forEach { kover(it) }
}

Expected Behavior

Kover should be compatible with Kotlin 2.3.10 and properly resolve dependencies without requiring special variant attributes from kotlin-stdlib.

[shanshin]

Hi,
sorry, I don't quite understand the configuration of your project.

Apply Kover 0.9.7 to the root project

An applying Kover in the root project by itself, without additional settings, does not add any dependencies and does not apply Kover in subprojects.

In kover dependencies, only project(":project-path") should be present, dependencies not from the current build (for example, kotlin-stdlib) should not be specified there.

Could you describe in more detail your configuration, which project is problematic, and how the kover dependency on kotlin-stdlib could get there?