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using System;
using System.Threading;
using System.Threading.Tasks;
class X
{
static bool unobserved;
public static int Main ()
{
TaskScheduler.UnobservedTaskException += TaskScheduler_UnobservedTaskException;
try {
Test ().Wait ();
GC.Collect ();
GC.WaitForPendingFinalizers ();
if (unobserved)
return 1;
return 0;
} finally {
TaskScheduler.UnobservedTaskException -= TaskScheduler_UnobservedTaskException;
}
}
static void TaskScheduler_UnobservedTaskException (object sender, UnobservedTaskExceptionEventArgs e)
{
unobserved = true;
Console.WriteLine ("unobserved");
}
static async Task Test ()
{
try {
await ThrowAsync ();
} catch {
}
}
static async Task ThrowAsync()
{
await Task.Delay (5);
throw new Exception ("boom");
}
}
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