I think I got an infinite loop in `Recomposer.kt`. Only Compose’s code in the thread stack. I’m on a...

# compose

[Vsevolod Ganin]

I think I got an infinite loop in Recomposer.kt. Only Compose’s code in the thread stack. I’m on alpha12

Untitled

[Vsevolod Ganin]

It got stuck in section looping indefinitely

while (shouldKeepRecomposing) {
    // Await something to do
    if (_state.value < State.PendingWork) {
        suspendCancellableCoroutine<Unit> { co ->
            synchronized(stateLock) {
                val currentState = _state.value
                if (currentState == State.PendingWork ||
                    currentState <= State.ShuttingDown
                ) {
                    co.resume(Unit)
                } else {
                    frameContinuation = co
                }
            }
        }
    }

    // Don't await a new frame if we don't have frame-scoped work
    if (
        synchronized(stateLock) {
            if (!hasFrameWorkLocked) {
                recordComposerModificationsLocked()
                !hasFrameWorkLocked
            } else false
        }
    ) continue
    
    ...

[Vsevolod Ganin]

Maybe someone could advise to look something in particular to debug this. It doesn’t happen 100% of the time, seems like more of a heisenbug to me. Maybe tied with pointerInput but I’m not sure

[Adam Powell]

please file an issue with a repro sample if you can isolate it, this is definitely something I would like to trace if possible

[Sarojini]

@Vsevolod Ganin did you find solution to this ?

[Vsevolod Ganin]

Hey @Sarojini, umm no, I think it has gone away with the update at the time. Also, I think I've got carried away so I forgot to file an issue, sorry about that. Anyway, the Google Play Console doesn't report any ANRs in my production build now, so I guess the problem is gone for good for me.

[Sarojini]

Okey nice! Actually I am facing same anr for my app in production, so looking for solution on internet but no luck yet.

[Vsevolod Ganin]

The only hint I can give, as I remember, there was something to do with empty pointerInput. By that I mean no event consuming is happening in some pointerInput lambda

[Vsevolod Ganin]

But I'm not really sure, it was 2 years ago :)

[Sarojini]

No issues. Thank you.