Gradle 4.6-rc-2 Jacoco NullPointerException

[chali]

Hello,

I'm trying Gradle 4.6-rc-2. I've encountered an error during the configuration phase. Gretty is initializing Jacoco which uses a new API which is returning null. The new method is coming from JavaForkOptions. When you are creating JacocoHelper in creates an empty implementation for each method from JavaForkOptions. The code is here:

gretty/libs/gretty/src/main/groovy/org/akhikhl/gretty/StartBaseTask.groovy

Lines 145 to 155 in 3084987

	jacocoHelper = (TaskInternal.methods.collectEntries({ [it.name, {} ] }) +
	JavaForkOptions.methods.collectEntries({ [it.name, {} ] }) +
	ExtensionAware.methods.collectEntries({ [it.name, {} ] }) + [
	getExtensions: { startTask.getExtensions() },
	getInputs: { startTask.getInputs() },
	getJacoco: { startTask.extensions.jacoco },
	getName: { startTask.getName() },
	getOutputs: { startTask.getOutputs() },
	getProject: { startTask.project },
	getWorkingDir: { project.projectDir },
	]) as JacocoHelper

Here is the NullPointerExecption https://github.com/gradle/gradle/blob/v4.6.0-RC2/subprojects/jacoco/src/main/java/org/gradle/testing/jacoco/plugins/JacocoPluginExtension.java#L117. Would be a special implementation for this method returning empty list enough?

Here is an example project showing the problem. You can run ./gradlew classes --stacktrace.
https://github.com/chali/jacocoAndGretty

Thanks

[wolfs]

Would be fixed by #415.

[chali]

I'm closing my duplicate PR.