Bug 12289 - Invalid cref:T:System.Collections.Generic.IList<T>
Summary: Invalid cref:T:System.Collections.Generic.IList<T>
Alias: None
Product: Xamarin Studio
Classification: Desktop
Component: C# Binding ()
Version: Trunk
Hardware: PC Mac OS
: Normal normal
Target Milestone: 4.0.9 (from master)
Assignee: Mike Krüger
Depends on:
Reported: 2013-05-17 14:29 UTC by Mikayla Hutchinson [MSFT]
Modified: 2013-06-24 16:18 UTC (History)
1 user (show)

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

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Description Mikayla Hutchinson [MSFT] 2013-05-17 14:29:51 UTC
When hovering over "List<string>" in the source editor I get the following error in the terminal:

WARNING [2013-05-17 14:25:32Z]: Invalid cref:T:System.Collections.Generic.IList<T>
System.NullReferenceException: Object reference not set to an instance of an object
  at ICSharpCode.NRefactory.Documentation.IdStringProvider.FindEntity (System.String idString, ITypeResolveContext context) [0x00047] in /Users/michael/Mono/monodevelop/main/external/nrefactory/ICSharpCode.NRefactory/Documentation/IdStringProvider.cs:383 
  at ICSharpCode.NRefactory.Documentation.DocumentationComment.ResolveCref (System.String cref) [0x00002] in /Users/michael/Mono/monodevelop/main/external/nrefactory/ICSharpCode.NRefactory/Documentation/DocumentationComment.cs:77 
  at MonoDevelop.Ide.TypeSystem.AmbienceService.GetCref (ITypeResolveContext ctx, System.String cref) [0x00032] in /Users/michael/Mono/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.TypeSystem/AmbienceService.cs:211
Comment 1 Mikayla Hutchinson [MSFT] 2013-05-17 15:06:55 UTC
It looks like it's having trouble with the format of the crefs in the content it's getting from MonoDoc.
Comment 2 Mike Krüger 2013-05-24 03:32:34 UTC
I fixed the exception - but the problem is the cref.

T:System.Collections.Generic.IList<T> is not a valid ID string.

The ID string would be: T:System.Collections.Generic.IList{T}
Comment 3 Mikayla Hutchinson [MSFT] 2013-05-28 14:19:44 UTC
Technically correct, but the problem is we have many of these in our MonoDoc based docs, and MonoDoc itself handles <> as well as {}. So the pragmatic solution would be to allow <>.
Comment 4 Mike Krüger 2013-05-29 01:43:43 UTC
The exception no longer happens. I'm not really for the idea to allow <> because that would taught our users to use <> in the crefs in their xml docs - which is simply wrong and wont work with other tools. (esp. MS) It's not that much of an issue in the tooltips.
Comment 5 Mikayla Hutchinson [MSFT] 2013-05-29 10:46:05 UTC
Can we at least special case it so we can handle these when they come from MonoDoc? It's "valid" in MonoDoc.
Comment 6 Mike Krüger 2013-05-29 11:59:19 UTC
I put it on the todo pile. But y for monodoc only it may be possible.
Comment 7 Mike Krüger 2013-06-07 04:22:55 UTC

btw. I found a nrefactory bug as well doing this one - therefore it was well spent time :)
Comment 8 PJ 2013-06-24 16:18:49 UTC
This bug was marked as fixed for Xamarin Studio 4.0.9, which is currently in the beta channel. Try it out!