Describe the bug or issue that you're seeing.

After updating from AGP 8.8.1 to 8.9.0-rc02 in a project with testFixtures enabled gradle sync fails with the following stacktrace.

java.util.concurrent.ExecutionException: java.lang.NullPointerException: group.displayName must not be null
	at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122)
	at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:205)
	at org.gradle.internal.configuration.problems.CommonReport$State$Spooling.commitReportTo(CommonReport.kt:192)
	at org.gradle.internal.configuration.problems.CommonReport.writeReportFileTo(CommonReport.kt:370)
	at org.gradle.problems.internal.impl.DefaultProblemsReportCreator.createReportFile(DefaultProblemsReportCreator.kt:65)
	at org.gradle.problems.internal.services.DefaultProblemSummarizer.report(DefaultProblemSummarizer.java:77)
	at org.gradle.internal.buildtree.ProblemReportingBuildActionRunner.reportProblems(ProblemReportingBuildActionRunner.java:61)
	at org.gradle.internal.buildtree.ProblemReportingBuildActionRunner.run(ProblemReportingBuildActionRunner.java:52)
	at org.gradle.launcher.exec.BuildOutcomeReportingBuildActionRunner.run(BuildOutcomeReportingBuildActionRunner.java:71)
	at org.gradle.tooling.internal.provider.FileSystemWatchingBuildActionRunner.run(FileSystemWatchingBuildActionRunner.java:135)
	at org.gradle.launcher.exec.BuildCompletionNotifyingBuildActionRunner.run(BuildCompletionNotifyingBuildActionRunner.java:41)
	at org.gradle.launcher.exec.RootBuildLifecycleBuildActionExecutor.lambda$execute$0(RootBuildLifecycleBuildActionExecutor.java:54)
	at org.gradle.composite.internal.DefaultRootBuildState.run(DefaultRootBuildState.java:130)
	at org.gradle.launcher.exec.RootBuildLifecycleBuildActionExecutor.execute(RootBuildLifecycleBuildActionExecutor.java:54)
	at org.gradle.internal.buildtree.InitDeprecationLoggingActionExecutor.execute(InitDeprecationLoggingActionExecutor.java:62)
	at org.gradle.internal.buildtree.InitProblems.execute(InitProblems.java:36)
	at org.gradle.internal.buildtree.DefaultBuildTreeContext.execute(DefaultBuildTreeContext.java:40)
	at org.gradle.launcher.exec.BuildTreeLifecycleBuildActionExecutor.lambda$execute$0(BuildTreeLifecycleBuildActionExecutor.java:71)
	at org.gradle.internal.buildtree.BuildTreeState.run(BuildTreeState.java:60)
	at org.gradle.launcher.exec.BuildTreeLifecycleBuildActionExecutor.execute(BuildTreeLifecycleBuildActionExecutor.java:71)
	at org.gradle.launcher.exec.RunAsBuildOperationBuildActionExecutor$2.call(RunAsBuildOperationBuildActionExecutor.java:67)
	at org.gradle.launcher.exec.RunAsBuildOperationBuildActionExecutor$2.call(RunAsBuildOperationBuildActionExecutor.java:63)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:209)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:204)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
	at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:166)
	at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
	at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:53)
	at org.gradle.launcher.exec.RunAsBuildOperationBuildActionExecutor.execute(RunAsBuildOperationBuildActionExecutor.java:63)
	at org.gradle.launcher.exec.RunAsWorkerThreadBuildActionExecutor.lambda$execute$0(RunAsWorkerThreadBuildActionExecutor.java:36)
	at org.gradle.internal.work.DefaultWorkerLeaseService.withLocks(DefaultWorkerLeaseService.java:263)
	at org.gradle.internal.work.DefaultWorkerLeaseService.runAsWorkerThread(DefaultWorkerLeaseService.java:127)
	at org.gradle.launcher.exec.RunAsWorkerThreadBuildActionExecutor.execute(RunAsWorkerThreadBuildActionExecutor.java:36)
	at org.gradle.tooling.internal.provider.continuous.ContinuousBuildActionExecutor.execute(ContinuousBuildActionExecutor.java:110)
	at org.gradle.tooling.internal.provider.SubscribableBuildActionExecutor.execute(SubscribableBuildActionExecutor.java:64)
	at org.gradle.internal.session.DefaultBuildSessionContext.execute(DefaultBuildSessionContext.java:46)
	at org.gradle.internal.buildprocess.execution.BuildSessionLifecycleBuildActionExecutor$ActionImpl.apply(BuildSessionLifecycleBuildActionExecutor.java:92)
	at org.gradle.internal.buildprocess.execution.BuildSessionLifecycleBuildActionExecutor$ActionImpl.apply(BuildSessionLifecycleBuildActionExecutor.java:80)
	at org.gradle.internal.session.BuildSessionState.run(BuildSessionState.java:71)
	at org.gradle.internal.buildprocess.execution.BuildSessionLifecycleBuildActionExecutor.execute(BuildSessionLifecycleBuildActionExecutor.java:62)
	at org.gradle.internal.buildprocess.execution.BuildSessionLifecycleBuildActionExecutor.execute(BuildSessionLifecycleBuildActionExecutor.java:41)
	at org.gradle.internal.buildprocess.execution.StartParamsValidatingActionExecutor.execute(StartParamsValidatingActionExecutor.java:64)
	at org.gradle.internal.buildprocess.execution.StartParamsValidatingActionExecutor.execute(StartParamsValidatingActionExecutor.java:32)
	at org.gradle.internal.buildprocess.execution.SessionFailureReportingActionExecutor.execute(SessionFailureReportingActionExecutor.java:51)
	at org.gradle.internal.buildprocess.execution.SessionFailureReportingActionExecutor.execute(SessionFailureReportingActionExecutor.java:39)
	at org.gradle.internal.buildprocess.execution.SetupLoggingActionExecutor.execute(SetupLoggingActionExecutor.java:47)
	at org.gradle.internal.buildprocess.execution.SetupLoggingActionExecutor.execute(SetupLoggingActionExecutor.java:31)
	at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:70)
	at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:37)
	at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
	at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:39)
	at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
	at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:29)
	at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
	at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:35)
	at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
	at org.gradle.launcher.daemon.server.exec.ForwardClientInput.lambda$execute$0(ForwardClientInput.java:40)
	at org.gradle.internal.daemon.clientinput.ClientInputForwarder.forwardInput(ClientInputForwarder.java:80)
	at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:37)
	at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
	at org.gradle.launcher.daemon.server.exec.LogAndCheckHealth.execute(LogAndCheckHealth.java:64)
	at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
	at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:63)
	at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:37)
	at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
	at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:84)
	at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:37)
	at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
	at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:52)
	at org.gradle.launcher.daemon.server.DaemonStateCoordinator.lambda$runCommand$0(DaemonStateCoordinator.java:321)
	at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
	at org.gradle.internal.concurrent.AbstractManagedExecutor$1.run(AbstractManagedExecutor.java:48)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
	at java.base/java.lang.Thread.run(Thread.java:1575)
Caused by: java.lang.NullPointerException: group.displayName must not be null
	at org.gradle.problems.internal.impl.DefaultProblemsReportCreatorKt$problemId$1$1.invoke(DefaultProblemsReportCreator.kt:104)
	at org.gradle.problems.internal.impl.DefaultProblemsReportCreatorKt$problemId$1$1.invoke(DefaultProblemsReportCreator.kt:102)
	at org.gradle.internal.cc.impl.problems.JsonWriter$jsonObjectList$1$1.invoke(JsonWriter.kt:84)
	at org.gradle.internal.cc.impl.problems.JsonWriter$jsonObjectList$1$1.invoke(JsonWriter.kt:83)
	at org.gradle.internal.cc.impl.problems.JsonWriter.jsonObject(JsonWriter.kt:39)
	at org.gradle.internal.cc.impl.problems.JsonWriter$jsonObjectList$1.invoke(JsonWriter.kt:83)
	at org.gradle.internal.cc.impl.problems.JsonWriter$jsonObjectList$1.invoke(JsonWriter.kt:82)
	at org.gradle.internal.cc.impl.problems.JsonWriter$jsonList$1$1.invoke(JsonWriter.kt:98)
	at org.gradle.internal.cc.impl.problems.JsonWriter$jsonList$1$1.invoke(JsonWriter.kt:97)
	at org.gradle.internal.cc.impl.problems.JsonWriter.jsonListItem(JsonWriter.kt:105)
	at org.gradle.internal.cc.impl.problems.JsonWriter.jsonList(JsonWriter.kt:97)
	at org.gradle.internal.cc.impl.problems.JsonWriter.jsonObjectList(JsonWriter.kt:82)
	at org.gradle.internal.cc.impl.problems.JsonWriter.jsonObjectList(JsonWriter.kt:77)
	at org.gradle.problems.internal.impl.DefaultProblemsReportCreatorKt$problemId$1.invoke(DefaultProblemsReportCreator.kt:102)
	at org.gradle.problems.internal.impl.DefaultProblemsReportCreatorKt$problemId$1.invoke(DefaultProblemsReportCreator.kt:100)
	at org.gradle.internal.cc.impl.problems.JsonWriter.property(JsonWriter.kt:73)
	at org.gradle.problems.internal.impl.DefaultProblemsReportCreatorKt.problemId(DefaultProblemsReportCreator.kt:100)
	at org.gradle.problems.internal.impl.DefaultProblemsReportCreator$createReportFile$1$writeToJson$1$1$1$2$1$1.invoke(DefaultProblemsReportCreator.kt:78)
	at org.gradle.problems.internal.impl.DefaultProblemsReportCreator$createReportFile$1$writeToJson$1$1$1$2$1$1.invoke(DefaultProblemsReportCreator.kt:77)
	at org.gradle.internal.cc.impl.problems.JsonWriter.jsonObject(JsonWriter.kt:39)
	at org.gradle.problems.internal.impl.DefaultProblemsReportCreator$createReportFile$1$writeToJson$1$1$1$2$1.invoke(DefaultProblemsReportCreator.kt:77)
	at org.gradle.problems.internal.impl.DefaultProblemsReportCreator$createReportFile$1$writeToJson$1$1$1$2$1.invoke(DefaultProblemsReportCreator.kt:76)
	at org.gradle.internal.cc.impl.problems.JsonWriter$jsonList$1$1.invoke(JsonWriter.kt:98)
	at org.gradle.internal.cc.impl.problems.JsonWriter$jsonList$1$1.invoke(JsonWriter.kt:97)
	at org.gradle.internal.cc.impl.problems.JsonWriter.jsonListItem(JsonWriter.kt:105)
	at org.gradle.internal.cc.impl.problems.JsonWriter.jsonList(JsonWriter.kt:97)
	at org.gradle.internal.cc.impl.problems.JsonWriter.jsonList(JsonWriter.kt:90)
	at org.gradle.problems.internal.impl.DefaultProblemsReportCreator$createReportFile$1$writeToJson$1$1$1$2.invoke(DefaultProblemsReportCreator.kt:76)
	at org.gradle.problems.internal.impl.DefaultProblemsReportCreator$createReportFile$1$writeToJson$1$1$1$2.invoke(DefaultProblemsReportCreator.kt:75)
	at org.gradle.internal.cc.impl.problems.JsonWriter.property(JsonWriter.kt:73)
	at org.gradle.problems.internal.impl.DefaultProblemsReportCreator$createReportFile$1$writeToJson$1$1$1.invoke(DefaultProblemsReportCreator.kt:75)
	at org.gradle.problems.internal.impl.DefaultProblemsReportCreator$createReportFile$1$writeToJson$1$1$1.invoke(DefaultProblemsReportCreator.kt:69)
	at org.gradle.internal.cc.impl.problems.JsonWriter.jsonObject(JsonWriter.kt:39)
	at org.gradle.problems.internal.impl.DefaultProblemsReportCreator$createReportFile$1$writeToJson$1$1.invoke(DefaultProblemsReportCreator.kt:69)
	at org.gradle.problems.internal.impl.DefaultProblemsReportCreator$createReportFile$1$writeToJson$1$1.invoke(DefaultProblemsReportCreator.kt:68)
	at org.gradle.internal.cc.impl.problems.JsonWriter.property(JsonWriter.kt:73)
	at org.gradle.problems.internal.impl.DefaultProblemsReportCreator$createReportFile$1.writeToJson(DefaultProblemsReportCreator.kt:68)
	at org.gradle.internal.cc.impl.problems.JsonModelWriter.endModel(JsonModelWriter.kt:31)
	at org.gradle.internal.cc.impl.problems.HtmlReportWriter.endHtmlReport(HtmlReportWriter.kt:41)
	at org.gradle.internal.configuration.problems.CommonReport$State$Spooling.closeHtmlReport(CommonReport.kt:213)
	at org.gradle.internal.configuration.problems.CommonReport$State$Spooling.access$closeHtmlReport(CommonReport.kt:140)
	at org.gradle.internal.configuration.problems.CommonReport$State$Spooling$commitReportTo$reportFile$1.call(CommonReport.kt:189)
	at org.gradle.internal.configuration.problems.CommonReport$State$Spooling$commitReportTo$reportFile$1.call(CommonReport.kt:188)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
	... 5 more
	Suppressed: com.fasterxml.jackson.core.JsonGenerationException: Current context not Object but Array
		at com.fasterxml.jackson.core.JsonGenerator._reportError(JsonGenerator.java:2858)
		at com.fasterxml.jackson.core.json.WriterBasedJsonGenerator.writeEndObject(WriterBasedJsonGenerator.java:356)
		at org.gradle.internal.cc.impl.problems.JsonWriter.endObject(JsonWriter.kt:48)
		at org.gradle.internal.cc.impl.problems.JsonWriter$JsonObject.close(JsonWriter.kt:30)
		at kotlin.jdk7.AutoCloseableKt.closeFinally(AutoCloseableJVM.kt:51)
		at org.gradle.internal.cc.impl.problems.JsonWriter.jsonObject(JsonWriter.kt:38)
		... 29 more
	Suppressed: com.fasterxml.jackson.core.JsonGenerationException: Current context not Object but Array
		at com.fasterxml.jackson.core.JsonGenerator._reportError(JsonGenerator.java:2858)
		at com.fasterxml.jackson.core.json.WriterBasedJsonGenerator.writeEndObject(WriterBasedJsonGenerator.java:356)
		at org.gradle.internal.cc.impl.problems.JsonWriter.endObject(JsonWriter.kt:48)
		at org.gradle.internal.cc.impl.problems.JsonWriter$JsonObject.close(JsonWriter.kt:30)
		at kotlin.jdk7.AutoCloseableKt.closeFinally(AutoCloseableJVM.kt:51)
		at org.gradle.internal.cc.impl.problems.JsonWriter.jsonObject(JsonWriter.kt:38)
		... 16 more

I have the following in my gradle.properties to enable test fixtures:

android.experimental.enableTestFixtures=true
android.experimental.enableTestFixturesKotlinSupport=true

I also have multiple modules that include test fixtures

Build: AI-243.24978.46.2432.13093109, 202502200128 AS: Meerkat Feature Drop | 2024.3.2 Canary 6 AI-243.24978.46.2432.13093109, JRE 21.0.5+-13047016-b750.29x64 JetBrains s.r.o., OS Mac OS X(aarch64) v15.3.1, screens 3456x2234 (200%), 3840x1600 (100%); Retina Android Gradle Plugin: 8.9.0-rc02 Gradle: 8.12 Gradle JDK: Eclipse Temurin 23.0.2 - aarch64 NDK: from local.properties: (not specified), latest from SDK: 27.0.12077973 CMake: from local.properties: (not specified), latest from SDK: (not found), from PATH: (not found)

Issue 399153010

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