API 23 is throwing `java lang IllegalStateException Snapshot

Question

API 23 is throwing `java lang IllegalStateException Snapshot is not open` Anyone experienced it

K Merle · Answer

```java lang IllegalStateException Snapshot is not open at androidx compose runtime snapshots SnapshotKt validateOpen Snapshot kt 1767 at androidx compose runtime snapshots SnapshotKt access$validateOpen Snapshot kt 1 at androidx compose runtime snapshots MutableSnapshot apply Snapshot kt 709 at androidx compose runtime Recomposer applyAndCheck Recomposer kt 954 at androidx compose runtime Recomposer performRecompose Recomposer kt 1283 at androidx compose runtime Recomposer access$performRecompose Recomposer kt 107 at androidx compose runtime Recomposer$runRecomposeAndApplyChanges$2$2 invoke Recomposer kt 485 at androidx compose runtime Recomposer$runRecomposeAndApplyChanges$2$2 invoke Recomposer kt 454 at androidx compose ui platform AndroidUiFrameClock$withFrameNanos$2$callback$1 doFrame AndroidUiFrameClock android kt 34 at androidx compose ui platform AndroidUiDispatcher performFrameDispatch AndroidUiDispatcher android kt 109 at androidx compose ui platform AndroidUiDispatcher access$performFrameDispatch AndroidUiDispatcher android kt 41 at androidx compose ui platform AndroidUiDispatcher$dispatchCallback$1 doFrame AndroidUiDispatcher android kt 69 at android view Choreographer$CallbackRecord run Choreographer java 856 at android view Choreographer doCallbacks Choreographer java 670 at android view Choreographer doFrame Choreographer java 603 at android view Choreographer$FrameDisplayEventReceiver run Choreographer java 844 at android os Handler handleCallback Handler java 739 at android os Handler dispatchMessage Handler java 95 at android os Looper loop Looper java 148 at android app ActivityThread main ActivityThread java 5417 at java lang reflect Method invoke Native Method at com android internal os ZygoteInit$MethodAndArgsCaller run ZygoteInit java 726 at com android internal os ZygoteInit main ZygoteInit java 616 Suppressed kotlinx coroutines DiagnosticCoroutineContextException androidx compose runtime PausableMonotonicFrameClock dcbbfad androidx compose ui platform MotionDurationScaleImpl f582e2 StandaloneCoroutine Cancelling 335c673 AndroidUiDispatcher 4eb930 ```

Zach Klippenstein (he/him) [MOD] · Answer

Which version of compose and can you share a minimal repro case

K Merle · Answer

Version `1 2 1` compiler `1 3 0` Kotlin `1 7 10` I literally don t know when it happens I just tried API 23 and it just breaks API 24 works Removing `StateFlows` from `ViewModels` makes bug go away There isn t anything in particular special about those as I ve done it hundreds of times

Colton Idle · Answer

If you have some reproducible code you could share I can try to repro on my end lmk

K Merle · Answer

Thanks a lot Colton As it happens only on API 23 not even 24 for now I ll focus on some other stuff and come back to this some time later on It s a companies project and we are 2 months into the development of the project

Zach Klippenstein (he/him) [MOD] · Answer

Cc < Chuck Jazdzewski G > in case this rings any bells for him

Chuck Jazdzewski [G] · Answer

I haven t seen anything similar It appears something is applying the snapshot early I am uncertain what could cause this

K Merle · Answer

There are already some issues on <https www google com search client=firefox b d amp q= 22java lang IllegalStateException 3A+Snapshot+is+not+open 22|Google search> about it none of these helped atm

Chuck Jazdzewski [G] · Answer

Like < Zach Klippenstein he him MOD > said if you have a repro case that would be very helpful

mruno · Answer

We are also seeing this in our app same versions of everything Only seems to come up in tests Firbase Test Lab NexusLowRes api 23 I haven t seen a production report with this error yet

mruno · Answer

It is also not something that happens every test execution It s flaky

Chuck Jazdzewski [G] · Answer

What is the test doing

mruno · Answer

One that I see flake often is on a line where we call painterResource inside a recycler view adapter via a composeview The test is just asserting things are on screen and navigating around nothing too fancy

mruno · Answer

We use painterResource to load a vector drawable

mruno · Answer

While it s composing the vector painter when it calls setContent it throws the error

Chuck Jazdzewski [G] · Answer

Can you 1 create a bug for this <https goo gle compose feedback> 2 Attach the stack trace of the crash 3 at least a sketch of the test or code of the test itself if it is not privileged 4 include the information of the test lab failure such as NexusLowRes api 23 or any other descriptions where you are seeing this failure We have heard other reports of similar failures but we have not been able to reproduce this locally in order to track this down Any help you can give would be greatly appriciated

mruno · Answer

Are there any debug traces or logs which we might be able to generate and then share with the bug report

Chuck Jazdzewski [G] · Answer

No The runtime doesn t have any logging I rely on runtime asserts for such things and I suspect that I missed an assert A reproducible test case here would be helpful even if it is flakey

mruno · Answer

Got it we re trying to get that created