AbstractMethodError when use withTimeout

I am getting the following error java.lang.AbstractMethodError: abstract method "kotlinx.coroutines.DisposableHandle kotlinx.coroutines.Delay.invokeOnTimeout(long, java.lang.Runnable, kotlin.coroutines.CoroutineContext)" when calling the withTimeout method into commonMain module.

    override suspend fun notifyCharacteristic(uuid: String, enabled: Boolean): Flow<ByteArray> {
        return withTimeout(2000) {
            bluetoothDataSource.watchConnectionState().filter {
                it == DeviceConnectionState.STATE_DISCOVERED
            }.first()

            val charac = retrieveCharacteristic(characteristics, uuid)
                ?: throw IllegalStateException("Characteristic is null")

            bluetoothDataSource.notifyCharacteristic(
                charac,
                enabled,
                "00002902-0000-1000-8000-00805f9b34fb"
            ).map { it.toByteArray() }
        }
    }

My project is configured in this way:

       getByName("commonMain") {
            dependencies {
                implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.4.0-M1")
            }
        }
        getByName("androidMain") {
            dependencies {
                implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.4.0-M1")
            }
        }
        getByName("iosMain") {
            dependencies {
                implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.4.0-M1")
            }
        }

Can be the notifyCharacteristic function bad written?

Thank you

[lukas1]

@mkotyk

What platform? And which dependency are you using?

If on Android, I had the same issue and fixed it as follows:

Originally I used org.jetbrains.kotlinx:kotlinx-coroutines-core:, but reading comments here, I switched to org.jetbrains.kotlinx:kotlinx-coroutines-android:. That helped.

[mkotyk]

I’m seeing this too, and it’s related to using debounce with 1.4.0 … once I took the debounce out, the crash stopped.

Here’s my usage:

 val showBiometricsPrompt: LiveData<ShowBiometricsPrompt?>
        get() = combine(_username.debounce(250), enrollingBiometrics) { a, b -> a to b }
            .map { (username, enrollingBiometrics) ->
                if (biometricsAvailable() is BiometricsAvailable.Result.Yes &&
                    (enrollingBiometrics || biometricsEnabledForUser(BiometricsEnabledForUser.Request(username)) is BiometricsEnabledForUser.Result.Yes)
                ) {
                    ShowBiometricsPrompt(username, enrollingBiometrics)
                } else {
                    null
                }
            }
            .asLiveData()