Gendarme warnings for async statement

Greetings,

put the following code into a new .NET 4 console application, enable Gendarme code analysis, and build it.

  var a := async begin
    // Do something
  end;
  // Wait for async code to finish
  a; 

I get the following two warnings (using Oxygene 5.2.37.1075):

warning Medium/Total: This type is both nested and visible outside the assembly. Nested types are often confused with namespaces. Change the nested type to be invisible outside the assembly or un-nest it. (<PublicImplementationDetails>/future$ <PublicImplementationDetails>/future$)

...\Program.pas(15,1): warning High/Normal: This disposable local is not guaranteed to be disposed of before the method returns. Local 'a' of type 'Task modopt(<PublicImplementationDetails>/future$)' is not disposed of (at least not locally).

The first warning seems harmless and can be hidden by adding the following to CodeAnalysis.ignore.
R: Gendarme.Rules.Design.AvoidVisibleNestedTypesRule
T: <PublicImplementationDetails>/future$

I don't know if the second warning is something that can simply be hidden, or if it indicates that the compiler-generated code ought to dispose of the task after waiting for it.

Thanks in advance,
Robert