Bug 471 - TaskSchedulerException does not queue tasks which are not executed inline
Summary: TaskSchedulerException does not queue tasks which are not executed inline
Alias: None
Product: Class Libraries
Classification: Mono
Component: mscorlib ()
Version: master
Hardware: PC Linux
: --- normal
Target Milestone: Untriaged
Assignee: Jérémie Laval
Depends on:
Reported: 2011-08-26 07:39 UTC by Marek Safar
Modified: 2011-08-28 09:19 UTC (History)
1 user (show)

Is this bug a regression?: ---
Last known good build:

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Description Marek Safar 2011-08-26 07:39:27 UTC
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Threading.Tasks;

class TestScheduler : TaskScheduler
	protected override void QueueTask (Task task)
		Console.WriteLine ("queue");

	protected override bool TryDequeue (Task task)
		throw new NotImplementedException ();

	protected override bool TryExecuteTaskInline (Task task, bool taskWasPreviouslyQueued)
		return false;

	protected override IEnumerable<Task> GetScheduledTasks ()
		throw new NotImplementedException ();

class C
	public static void Main ()
		var ts = new TestScheduler ();
		Task t = new Task (() => {});
		t.RunSynchronously (ts);



Unhandled Exception: System.InvalidOperationException: The Task is not in a valid state to be started.
  at System.Threading.Tasks.Task.Start (System.Threading.Tasks.TaskScheduler scheduler) [0x00000] in <filename unknown>:0 
  at System.Threading.Tasks.Task.RunSynchronously (System.Threading.Tasks.TaskScheduler scheduler) [0x00000] in <filename unknown>:0 
  at C.Main () [0x00000] in <filename unknown>:0 


Comment 1 Jérémie Laval 2011-08-28 09:19:26 UTC
Fixed in master/12fdfa365c2aa449c132.