How to implement database to BroadcastReceiver (Alarm) - kotlin

Question

I'm making a app, that will notificate when time of task expiring. For creating notifications I'm using BroadcastReceiver.
There is my code of class AlarmReceiver
class AlarmReceiver: BroadcastReceiver() {
override fun onReceive(context: Context?, intent: Intent?) {
Log.e("yeah", "yeah")
val dao = TasksDatabase.getInstance(context = context!!.applicationContext).dao
//val repository = TasksRepositoryImpl(dao)
var list: List<Task> = listOf()
runBlocking {
launch {
Log.e("sad", "dsa")
list = dao.getTasks().flattenToList()
Log.e("list", list.toString())
}
}
val builder = NotificationCompat.Builder(context, "DoneApp")
.setSmallIcon(R.drawable.icon)
.setContentTitle("Done App")
.setContentText("")
.setAutoCancel(true)
.setDefaults(NotificationCompat.DEFAULT_ALL)
.setPriority(NotificationCompat.PRIORITY_HIGH)
val notificationManager = NotificationManagerCompat.from(context)
if(list.isNotEmpty()){
for(i in list){
Log.e("string", i.toString())
}
} else {
Log.e("log---", "---------------------------------")
}
notificationManager.notify(123, builder.build())
}
suspend fun <T> Flow<List<T>>.flattenToList() = flatMapConcat { it.asFlow() }.toList()
}
But it stops on list = dao.getTasks().flattenToList()
There is TasksDao
#Dao
interface TasksDAO {
#Insert
suspend fun insertTask(task: Task)
#Query("UPDATE task_table SET checked = :checked WHERE id = :id")
suspend fun checkTask(id: Int, checked: Boolean)
#Query("UPDATE task_table SET text = :text WHERE id = :id")
suspend fun textTask(id: Int, text: String)
#Query("DELETE FROM task_table WHERE id = :id")
suspend fun deleteTask(id: Int)
#Query("SELECT * FROM task_table")
fun getTasks(): Flow<List<Task>>
}