Bug 10428 - Unknown Resolve Error
Summary: Unknown Resolve Error
Alias: None
Product: Xamarin Studio
Classification: Desktop
Component: C# Binding ()
Version: Trunk
Hardware: PC Mac OS
: Normal normal
Target Milestone: ---
Assignee: Mike Krüger
Depends on:
Reported: 2013-02-19 05:40 UTC by Marek Safar
Modified: 2013-04-19 01:12 UTC (History)
2 users (show)

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

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Description Marek Safar 2013-02-19 05:40:34 UTC
using System;
using System.Threading.Tasks;

class A
	public Task OpenAsync ()
		return null;

class C
	public static void Main ()
	public A Connection {
		get {
			return null;
	async void Foo ()
			await Test ( // Hover over Test you gen Unknown resolve error
				async () => {
					await Connection.OpenAsync ();
	T Test<T> (Func<T> func)
		return default (T);
Comment 1 Mike Krüger 2013-02-19 05:44:00 UTC
doesn't even compile
Comment 2 Marek Safar 2013-02-19 05:51:04 UTC
Compiles successfully for me. What error do you get?
Comment 3 Mike Krüger 2013-02-19 05:58:55 UTC
/Library/Frameworks/Mono.framework/Versions/2.10.11/bin/dmcs /noconfig "/out:/Users/mkrueger/Projects/BugTest/BugTest/bin/Debug/BugTest.exe" "/r:/Library/Frameworks/Mono.framework/Versions/2.10.11/lib/mono/4.0/System.dll" "/r:/Library/Frameworks/Mono.framework/Versions/2.10.11/lib/mono/4.0/System.Core.dll" "/r:/Library/Frameworks/Mono.framework/Versions/2.10.11/lib/mono/4.0/Microsoft.CSharp.dll" /nologo /warn:4 /debug:full /optimize- /codepage:utf8 /platform:x86 "/define:DEBUG"  /t:exe "/Users/mkrueger/Projects/BugTest/BugTest/Main.cs" "/Users/mkrueger/Projects/BugTest/BugTest/AssemblyInfo.cs" 
Compilation failed: 4 error(s), 0 warnings

/Users/mkrueger/Projects/BugTest/BugTest/Main.cs(24,14): error CS1519: Unexpected symbol `void' in class, struct, or interface member declaration
/Users/mkrueger/Projects/BugTest/BugTest/Main.cs(27,23): error CS1525: Unexpected symbol `(', expecting `,', `;', or `='
/Users/mkrueger/Projects/BugTest/BugTest/Main.cs(30,13): error CS1525: Unexpected symbol `)', expecting `,', `;', or `='
/Users/mkrueger/Projects/BugTest/BugTest/Main.cs(34,4): error CS1525: Unexpected symbol `T'
Comment 4 Marek Safar 2013-02-19 06:00:04 UTC
Well, it's async code. You need Mono 3.0 and target 4.5 profile
Comment 5 Mike Krüger 2013-02-19 06:01:27 UTC
I hope I can switch to mono 3 for development some day ...
Comment 6 Mike Krüger 2013-02-25 04:55:01 UTC
Comment 7 Sergey Khabibullin 2013-04-19 01:12:15 UTC
The same error message for namespaces (monodevelop 4.0, Linux)

For example download the xunit solution https://xunit.codeplex.com/SourceControl/BrowseLatest. Then open it and find the ExecutorWrapper.cs in xunit.runner.utility project.

In my case the following statements are highlighted by red.

using System.Globalization;
using System.Reflection;

The error is "Unknown resolve error". All classes and interfaces from those namespaces are highlighted too. But the project compiles fine.