Intermittent feature-containers test failure - mozilla.components.feature.containers.ContainerMiddlewareTest - fetch the containers from the container storage and load into browser state on initialize container state action

[Archaeopteryx]

Firebase Test Run:

https://treeherder.mozilla.org/logviewer?job_id=356613305&repo=android-components

Stacktrace:

SUITE: mozilla.components.feature.containers.ContainerMiddlewareTest
  TEST: fetch the containers from the container storage and load into browser state on initialize container state action
    Downloading: org/robolectric/android-all/9-robolectric-4913185-2/android-all-9-robolectric-4913185-2.pom from repository sonatype at https://oss.sonatype.org/content/groups/public/
    Transferring 2K from sonatype
    Downloading: org/sonatype/oss/oss-parent/9/oss-parent-9.pom from repository sonatype at https://oss.sonatype.org/content/groups/public/
    Transferring 6K from sonatype
    Downloading: org/robolectric/android-all/9-robolectric-4913185-2/android-all-9-robolectric-4913185-2.jar from repository sonatype at https://oss.sonatype.org/content/groups/public/
    Transferring 118099K from sonatype
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.robolectric.util.ReflectionHelpers (file:/builds/worker/fetches/android-gradle-dependencies/central/org/robolectric/shadowapi/4.1/shadowapi-4.1.jar) to field java.lang.reflect.Field.modifiers
WARNING: Please consider reporting this to the maintainers of org.robolectric.util.ReflectionHelpers
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
    [Robolectric] mozilla.components.feature.containers.ContainerMiddlewareTest.fetch the containers from the container storage and load into browser state on initialize container state action: sdk=28; resources=binary
    Downloading: org/robolectric/android-all/8.1.0-robolectric-4611349/android-all-8.1.0-robolectric-4611349.pom from repository sonatype at https://oss.sonatype.org/content/groups/public/
    Transferring 2K from sonatype
    Downloading: org/robolectric/android-all/8.1.0-robolectric-4611349/android-all-8.1.0-robolectric-4611349.jar from repository sonatype at https://oss.sonatype.org/content/groups/public/
    Transferring 95237K from sonatype
    Called loadFromPath(/system/framework/framework-res.apk, true); mode=binary sdk=28
    I/AssetManager: no overlays.list file found
    I/PackageBackwardCompatibility: Could not find android.content.pm.OrgApacheHttpLegacyUpdater, ignoring
    I/PackageBackwardCompatibility: Could not find android.content.pm.AndroidTestBaseUpdater, ignoring
    I/MonitoringInstr: Instrumentation started!
OpenJDK 64-Bit Server VM warning: Sharing is only supported for boot loader classes because bootstrap classpath has been appended
  FAILURE

java.lang.AssertionError: expected:<ContainerState(contextId=contextId, name=Personal, color=GREEN, icon=CART)> but was:<null>
	at org.junit.Assert.fail(Assert.java:88)
	at org.junit.Assert.failNotEquals(Assert.java:834)
	at org.junit.Assert.assertEquals(Assert.java:118)
	at org.junit.Assert.assertEquals(Assert.java:144)
	at mozilla.components.feature.containers.ContainerMiddlewareTest$fetch the containers from the container storage and load into browser state on initialize container state action$1.invokeSuspend(ContainerMiddlewareTest.kt:70)
	at mozilla.components.feature.containers.ContainerMiddlewareTest$fetch the containers from the container storage and load into browser state on initialize container state action$1.invoke(ContainerMiddlewareTest.kt)
	at mozilla.components.feature.containers.ContainerMiddlewareTest$fetch the containers from the container storage and load into browser state on initialize container state action$1.invoke(ContainerMiddlewareTest.kt)
	at kotlinx.coroutines.test.TestBuildersKt$runBlockingTest$deferred$1.invokeSuspend(TestBuilders.kt:50)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
	at kotlinx.coroutines.test.TestCoroutineDispatcher.dispatch(TestCoroutineDispatcher.kt:50)
	at kotlinx.coroutines.internal.DispatchedContinuationKt.resumeCancellableWith(DispatchedContinuation.kt:322)
	at kotlinx.coroutines.intrinsics.CancellableKt.startCoroutineCancellable(Cancellable.kt:30)
	at kotlinx.coroutines.intrinsics.CancellableKt.startCoroutineCancellable$default(Cancellable.kt:25)
	at kotlinx.coroutines.CoroutineStart.invoke(CoroutineStart.kt:110)
	at kotlinx.coroutines.AbstractCoroutine.start(AbstractCoroutine.kt:126)
	at kotlinx.coroutines.BuildersKt__Builders_commonKt.async(Builders.common.kt:91)
	at kotlinx.coroutines.BuildersKt.async(Unknown Source)
	at kotlinx.coroutines.BuildersKt__Builders_commonKt.async$default(Builders.common.kt:82)
	at kotlinx.coroutines.BuildersKt.async$default(Unknown Source)
	at kotlinx.coroutines.test.TestBuildersKt.runBlockingTest(TestBuilders.kt:49)
	at kotlinx.coroutines.test.TestBuildersKt.runBlockingTest$default(TestBuilders.kt:45)
	at mozilla.components.feature.containers.ContainerMiddlewareTest.fetch the containers from the container storage and load into browser state on initialize container state action(ContainerMiddlewareTest.kt:58)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.robolectric.RobolectricTestRunner$HelperTestRunner$1.evaluate(RobolectricTestRunner.java:601)
	at org.robolectric.internal.SandboxTestRunner$2.evaluate(SandboxTestRunner.java:260)
	at org.robolectric.internal.SandboxTestRunner.runChild(SandboxTestRunner.java:130)
	at org.robolectric.internal.SandboxTestRunner.runChild(SandboxTestRunner.java:42)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.robolectric.internal.SandboxTestRunner$1.evaluate(SandboxTestRunner.java:84)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at androidx.test.ext.junit.runners.AndroidJUnit4.run(AndroidJUnit4.java:154)
	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:110)
	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58)
	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:38)
	at org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:62)
	at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
	at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
	at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
	at com.sun.proxy.$Proxy5.processTestClass(Unknown Source)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:121)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
	at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:182)
	at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:164)
	at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:414)
	at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
	at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
	at java.base/java.lang.Thread.run(Thread.java:829)

Build:

https://github.com/mozilla-mobile/android-components/commit/74a201106f7a45c5bd85141f12846765ceaffac8

┆Issue is synchronized with this Jira Task