I get it from old application ico-file and save in some Icon editor as PNG

I changed

imageFromResource

to

imageResource

and tried to repeat situation with

NullPointerException

, all works well...

After some compilations and test executions I receive again same error:

Exception in thread "AWT-EventQueue-0 @coroutine#1" java.lang.NullPointerException

at androidx.compose.ui.graphics.DesktopImageAssetKt.loadResource(DesktopImageAsset.kt:80)

@Igor Demin So, after many runs, I got this error again. I have little experience in describing errors, and I do not know if I can repeat this error in a separate code... I'll try to give you as much information as possible here: bug.txt - message about bug HintContainer - container for all main window content and hints. Render of main window:

@Composable
override fun render() {
    HintContainer {
        Scaffold(
            topBar = { infoBar.render() }
        ) {
            //...

infoBar render contains StatusIcon:

@Composable
override fun render() {
    val connectionState = remember { databaseController.connectionStatus }.collectAsState()
    TopAppBar {
        val connectMessage = derivedStateOf {
            when (connectionState.value) {
                ConnectionStatus.INITIALIZED -> "Connecting to database"
                ConnectionStatus.SUCCESS -> "Connected to ${databaseController.connection}"
                else -> "Failed connection"
            }
        }
        val statusColor = derivedStateOf {
            if (connectionState.value == ConnectionStatus.SUCCESS) Color.Unspecified
            else AppTheme.colors.material.error
        }

        Row(modifier = Modifier.weight(1f)) {
            StatusIcon(
                message = connectMessage.value,
                color = statusColor.value,
                modifier = Modifier.align(Alignment.CenterVertically).padding(8.dp)
            )
            // .....

connectionStatus described in databaseController:

private val _state = MutableStateFlow<ConnectionStatus>(ConnectionStatus.NOT_REQUESTED)
val connectionStatus: StateFlow<ConnectionStatus> get() = _state

_state.value changes in another coroutine I hope this information will be enough

Exception happened in this line?

val resource = Thread.currentThread().contextClassLoader.getResource(path)

Yes

Unfortunately I can't reproduce the bug (everything seems fine). Can you try this function instead of `imageResource`:

@Composable
fun imageResource2(path: String): ImageBitmap {
    return remember(path) { Image.makeFromEncoded(loadResource2(path)).asImageBitmap() }
}

private fun loadResource2(path: String): ByteArray {
    val resource = ClassLoader.getSystemClassLoader().getResource(path)
    requireNotNull(resource) { "Resource $path not found" }
    return resource.readBytes()
}

Also maybe on the latest version (0.2.0-build128) it will be working? We changed default coroutine dispatcher recently (https://github.com/JetBrains/compose-jb/issues/17)