Current Behavior

The equals contract ofProject::equals is broken when comparing against aLifecycleAwareProject:LifecycleAwareProject is equal to its correspondingDefaultProject but not the other way around.

Expected Behavior

equals() must be symmetric

Context (optional)

We have a plugin applied on the root project with an extension that maintains aSet<Project>.
A plugin applied on subprojects checks if the target project is contained in that set.

As of Gradle 8.10, the set now containsLifecycleAwareProjects and acontains(defaultProject) check always fails.

Also identity equality is not reliably anymore because ofLifecycleAwareProject (e.g. in Java code:project.getParent() == project.getRootProject()). This changed behavior is understandable but might be good to document it in the release notes.

Steps to Reproduce

/build.gradle.kts

project.ext["subproject"]= subprojects.toList()[0]

/subproject/build.gradle.kts

val lifecycleAware= rootProject.ext["subproject"]!!println("$lifecycleAware (${lifecycleAware.javaClass}")println("$project (${project.javaClass}")println(lifecycleAware== project)println(project== lifecycleAware)

This prints

> Configure project :subprojectproject ':subproject' (class org.gradle.api.internal.project.LifecycleAwareProject_Decoratedproject ':subproject' (class org.gradle.api.internal.project.DefaultProject_Decoratedtruefalse

Gradle version

8.10

Build scan URL (optional)

No response

Your Environment (optional)

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