IllegalStateException: Fragment HomeFragment not attached to a context.

[pocmo]

https://sentry.prod.mozaws.net/operations/fenix-nightly/issues/6162466/
https://sentry.prod.mozaws.net/operations/fenix-nightly/issues/6162466/
Socorro link

IllegalStateException: Fragment HomeFragment{1a41004} (84c6a2c6-6203-448c-b564-fee8f55208fc)} not attached to a context.
    at androidx.fragment.app.Fragment.requireContext(Fragment.java:2)
    at androidx.fragment.app.Fragment.getResources(Fragment.java:1)
    at org.mozilla.fenix.home.HomeFragment$onViewCreated$2.invokeSuspend(HomeFragment.kt:9)
    at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:2)
    at kotlinx.coroutines.DispatchedTask.run(Dispatched.kt:15)
...
(2 additional frame(s) were not displayed)

Fragment HomeFragment{1a41004} (84c6a2c6-6203-448c-b564-fee8f55208fc)} not attached to a context.

┆Issue is synchronized with this Jira Task

[pocmo]

Because of the UUID in the stack trace this is split over multiple crash reports in Sentry.

Crash stats seems to be a bit smarter:
https://crash-stats.mozilla.com/signature/?product=Fenix&version=72.0a1&signature=java.lang.IllegalStateException%3A%20at%20androidx.fragment.app.Fragment.requireContext%28Fragment.java%29&date=%3E%3D2019-11-20T10%3A20%3A00.000Z&date=%3C2019-11-27T10%3A20%3A00.000Z&_columns=date&_columns=product&_columns=version&_columns=build_id&_columns=platform&_columns=reason&_columns=address&_columns=install_time&_columns=startup_crash&_sort=-date&page=1#reports

According to crash stats the crash volume is increasing and it's now our top 6 crash.

[vesta0]

Need STR for this.

[severinrudie]

Note to QA: this is a very rare crash, and I don't think we're going to be able to reproduce it. I'm also very confident in the fix. If you don't mind, I think it's safe can call this qa-not-needed.

[severinrudie]

Closed by #7509

[liuche]

I'm still seeing issues for this https://sentry.prod.mozaws.net/operations/fenix-nightly/issues/6162466/

[boek]

We will monitor this over the next sprint

[boek]

this is definitely a race condition/memory leak. This PR reliably causes the crash

[ekager]

Possible that leak fixes for home in #10033 and #10012 will resolve these issues. We should monitor Nightly and see if instances start to decrease.

[liuche]

Looks like some change since mid-march in socorro 🤔

[ekager]

Okay another fix landed - after the next Nightly goes out let's monitor crash stats 🤞🏻

[AaronMT]

java.lang.IllegalStateException: Fragment HomeFragment{32dd527} (861da8e7-151f-4367-9f5a-af37c10c6e3b)} not attached to a context.
     FATAL EXCEPTION: main
Process: org.mozilla.fenix.debug, PID: 9206
java.lang.IllegalStateException: Fragment HomeFragment{32dd527} (861da8e7-151f-4367-9f5a-af37c10c6e3b)} not attached to a context.
	at androidx.fragment.app.Fragment.requireContext(Fragment.java:805)
	at org.mozilla.fenix.ext.FragmentKt.getRequireComponents(Fragment.kt:22)
	at org.mozilla.fenix.home.HomeFragment.getSessionManager(HomeFragment.kt:150)
	at org.mozilla.fenix.home.HomeFragment.getListOfSessions(HomeFragment.kt:836)
	at org.mozilla.fenix.home.HomeFragment.getListOfTabs(HomeFragment.kt:842)
	at org.mozilla.fenix.home.HomeFragment.emitSessionChanges(HomeFragment.kt:832)
	at org.mozilla.fenix.home.HomeFragment.access$emitSessionChanges(HomeFragment.kt:111)
	at org.mozilla.fenix.home.HomeFragment$onCreateView$sessionObserver$1.invoke(HomeFragment.kt:188)
	at org.mozilla.fenix.home.HomeFragment$onCreateView$sessionObserver$1.invoke(HomeFragment.kt:111)
	at org.mozilla.fenix.home.BrowserSessionsObserver$onStart$1$invokeSuspend$$inlined$collect$1.emit(Collect.kt:137)

https://console.firebase.google.com/u/0/project/moz-fenix/testlab/histories/bh.66b7091e15d53d45/matrices/8796887443883565548/executions/bs.e2cfcee6e6e97791

[AaronMT]

Another crash

https://console.firebase.google.com/u/0/project/moz-fenix/testlab/histories/bh.66b7091e15d53d45/matrices/8814662090942448693/executions/bs.b7e71229a2ddee82/issues

java.lang.IllegalStateException: Fragment HomeFragment{ed2a8} (c8f516b5-7891-4bf9-92db-114042a3c802)} not attached to a context.
     FATAL EXCEPTION: main
Process: org.mozilla.fenix.debug, PID: 8890
java.lang.IllegalStateException: Fragment HomeFragment{ed2a8} (c8f516b5-7891-4bf9-92db-114042a3c802)} not attached to a context.
	at androidx.fragment.app.Fragment.requireContext(Fragment.java:805)
	at org.mozilla.fenix.ext.FragmentKt.getRequireComponents(Fragment.kt:22)
	at org.mozilla.fenix.home.HomeFragment.getSessionManager(HomeFragment.kt:150)
	at org.mozilla.fenix.home.HomeFragment.getListOfSessions(HomeFragment.kt:836)
	at org.mozilla.fenix.home.HomeFragment.getListOfTabs(HomeFragment.kt:842)
	at org.mozilla.fenix.home.HomeFragment.emitSessionChanges(HomeFragment.kt:832)
	at org.mozilla.fenix.home.HomeFragment.access$emitSessionChanges(HomeFragment.kt:111)
	at org.mozilla.fenix.home.HomeFragment$onCreateView$sessionObserver$1.invoke(HomeFragment.kt:188)
	at org.mozilla.fenix.home.HomeFragment$onCreateView$sessionObserver$1.invoke(HomeFragment.kt:111)
	at org.mozilla.fenix.home.BrowserSessionsObserver$onStart$1$invokeSuspend$$inlined$collect$1.emit(Collect.kt:137)```

[sflorean]

I was able to reproduce this crash on Nightly 5/21. Device: Motorola Nexus 6 (Android 7.1.1).
STR:

1. Launch Fenix with a clean profile.
2. Tap on "Read our privacy notice" link from the "Your privacy card" - onboarding.

Reproducible 3/3.
https://crash-stats.mozilla.org/report/index/be958eb3-64a8-4f7a-9608-1b0b90200521

[ekager]

cc @sflorean are you still able to reproduce with those STR?

[sflorean]

@ekager sorry for the late reply here! Tested with the same device on Nightly 7/16 and on 79.0.0-beta.7 and the issue isn't reproducible anymore.