Cannot process instrumented class worker/org/gradle/api/JavaVersion. Please supply original non-instrumented classes

[James Cross]

Hi,

When running jacoco on a multi-module Gradle build I'm getting many failures of the form: Caused by: java.lang.IllegalStateException: Cannot process instrumented class worker/org/gradle/api/JavaVersion. Please supply original non-instrumented classes. for various different classes.

I'm using Gradle wrapper 6.6.1, latest Jacoco plugin version.

From the root Gradle file:

tasks.withType<JacocoReport> {
  sourceSets(sourceSets.main.get())
  executionData(tasks.test.get())
  reports {
    xml.isEnabled = true
    html.destination = file("${buildDir}/reports/jacoco/html")
    xml.destination = file("${buildDir}/reports/jacoco/xml")
  }
}

Then gradle clean cleanClasses buildTests results in these errors

[Marc Hoffmann]

Hi,

the problem is exactly what the error message says: JaCoCo need the *original* class files. Probably you have some other task that replaced them with offline-instrumentation (we do not recommend using so, the JaCoCo agent is the preferred way as no class files are modified on disk).

Please understand that the Gradle integration of JaCoCo is done by the Gradle project. So maybe you look at their documentation how to setup their tasks correctly.

Regards,

-marc

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