Bug 4150 - Missing method System.Threading.Tasks.Task::WhenAll(Task[])
Summary: Missing method System.Threading.Tasks.Task::WhenAll(Task[])
Alias: None
Product: Class Libraries
Classification: Mono
Component: mscorlib ()
Version: master
Hardware: PC All
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
Depends on:
Reported: 2012-03-29 09:46 UTC by soywiz
Modified: 2012-04-04 05:40 UTC (History)
2 users (show)

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

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Description soywiz 2012-03-29 09:46:31 UTC
I have compiled a project using Visual Studio 11 (last beta) that uses WhenAll Task method like this:

await Task.WhenAll(Task1, Task2);

On .NET 4.5 runs just fine, but running with mono 2.11 Trunk (Mono JIT compiler version 2.11 (master/4751bee Thu Mar 29 13:55:24 CEST 2012)) causes this error:

"Missing method System.Threading.Tasks.Task::WhenAll(Task[]) in assembly /usr/local/lib/mono/4.5/mscorlib.dll"

Here the definition seems to be right:

I have disassembled that DLL file with ILSpy and it has the method:
public static void WaitAll(params Task[] tasks);

The part just different is the "params", but since it is a sintactical sugar, it shouldn't be the problem. Also I have tested:

await Task.WhenAll(new[] { Task1, Task2 });

and has the same problem.
Comment 1 soywiz 2012-03-29 09:49:11 UTC
Sorry, my fault:

Is that "WhenAll" method is missing (that is the asynchronous equivalent for "WaitAll").
Comment 2 Marek Safar 2012-04-04 05:40:21 UTC
Fixed in master