Getting `java.lang.ClassCastException: androidx.co...

# compose

[Tlaster]

Getting java.lang.ClassCastException: androidx.compose.ui.platform.ParcelableMutableStateHolder cannot be cast to androidx.compose.runtime.MutableState after 1.0.0-beta02 when using rememberSaveable without custom saver, full stacktrace in thread

[Tlaster]

Untitled

[julioromano]

The fix was supposed to be in beta02 https://issuetracker.google.com/issues/180042685

Perhaps what we’re seeing is unrelated?

[Tlaster]

not sure if it is related, I can create a minimal sample

[Tlaster]

Untitled

[Tlaster]

step to reproduce:
1. scroll and select some item, and keep some selected item in the screen
2. lock the phone for a while
3. unlock the phone
4. scroll, and it will crash with the exception
it might happen randomly but I can reproduce the error for the most times.

[Andrey Kulikov]

Thanks, I filed https://issuetracker.google.com/issues/182453625 to investigate

[Andrey Kulikov]

@Tlaster I can’t reproduce it unfortunately. Can I ask you to provide more details as a comment in the bug? Do you also use compose-navigation? maybe you can share more code

[Tlaster]

No, I'm not using compose-navigation, I've just start an empty compose project with beta02 and kotlin 1.4.31 then use the code above, it still happens

[Tlaster]

Just record a video that reproduce the issue

2021-03-11 22-38-49.mkv

[Tlaster]

And here is the minimal sample source code I'm using https://github.com/Tlaster/rememberSaveable-crash-sample

[Andrey Kulikov]

ok, I managed to reproduce. thanks again!

[Andrey Kulikov]

Was able to find the issue. This will be fixed in next beta.
Workarounds from https://issuetracker.google.com/issues/180042685#comment4 or https://issuetracker.google.com/issues/180042685#comment7 should work here as well