[Mono-dev] Task class usage problem

[Jérémie Laval]

Actually it's ok, fixed on master and will backport to mono-2-10

--
Jérémie Laval
http://neteril.org

2011/3/21 Jérémie Laval <jeremie.laval at gmail.com>

> Hello,
>
> This is a bug in our implementation. Could you fill a bug please?
>
> --
> Jérémie Laval
> http://neteril.org
>
> On Mon, Mar 21, 2011 at 11:37 AM, vart <artemyv at gmail.com> wrote:
>
>> I'm compiling the following code on VS2010 or Monodev 2.6 for windows with
>> Net4.0 settings and get the correct output
>>
>> I compile the same code on Ubuntu/OpenSUSE using Mono 2.10 and Monodev 2.6
>> beta1 - I got not output.
>>
>> What is the problem here?
>>
>>
>> static void Main()
>>    {
>>
>>        var parent = Task.Factory.StartNew(() =>
>>        {
>>            // We’ll throw 3 exceptions at once using 3 child tasks:
>>
>>            int[] numbers = { 0 };
>>
>>            var childFactory = new TaskFactory
>>             (TaskCreationOptions.AttachedToParent,
>> TaskContinuationOptions.None);
>>
>>            childFactory.StartNew(() => 5 / numbers[0]);   // Division by
>> zero
>>            childFactory.StartNew(() => numbers[1]);      // Index out of
>> range
>>            childFactory.StartNew(() => { throw null; });  // Null
>> reference
>>        });
>>
>>        try { parent.Wait(); }
>>        catch (AggregateException aex)
>>        {
>>            aex.Flatten().Handle(ex =>   // Note that we still need to call
>> Flatten
>>            {
>>                if (ex is DivideByZeroException)
>>                {
>>                    Console.WriteLine("Divide by zero");
>>                    return true;                           // This
>> exception
>> is "handled"
>>                }
>>                else if (ex is IndexOutOfRangeException)
>>                {
>>                    Console.WriteLine("Index out of range");
>>                    return true;                           // This
>> exception
>> is "handled"
>>                }
>>                else
>>                {
>>                    Console.WriteLine("Other exception: " + ex.Message);
>>                    return true;                           // This
>> exception
>> is "handled"
>>                }
>>                //return false;    // All other exceptions will get
>> rethrown
>>            });
>>        }
>>    }
>>
>>
>> Output on Windows
>>
>> Other exception: Object reference not set to an instance of an object.
>> Divide by zero
>> Index out of range
>>
>> These line could be shown in different order depending on Task execution
>> order.
>>
>> On linux I do not get any output.
>> Same problem with several other samples using Task/TaskFactory classes
>> from
>> System.Threading.Tasks namespace
>>
>>
>>
>> --
>> View this message in context:
>> http://mono.1490590.n4.nabble.com/Task-class-usage-problem-tp3393138p3393138.html
>> Sent from the Mono - Dev mailing list archive at Nabble.com.
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>>
>
>
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