NullReferenceException when calling methodDefinition.Body

[madgnome]

MethodDefinition.Body throws a NullReferenceException when called on a method of an interface generated for COM interop.
(_System.Void Microsoft.Office.Interop.Excel._Application::VtblGap1_15())

namespace ciproject4
{
  public class ComInterop
  {
    public static void main(String args)
    {
      var excel = new Microsoft.Office.Interop.Excel.Application();
      excel.Cells[1, 1].Value2 = "Ma feuille Excel";
    }
  }
}

4 interfaces are generated by the compiler for this program :

• Microsoft.Office.Interop.Excel._Application
• Microsoft.Office.Interop.Excel.Application
• Microsoft.Office.Interop.Excel.AppEvents
• Microsoft.Office.Interop.Excel.AppEvents_Event

_Application declaration looks like that :

[ComImport, TypeIdentifier, Guid("000208D5-0000-0000-C000-000000000046"), CompilerGenerated, DefaultMember("_Default")]
public interface _Application
{
  void _VtblGap1_15();
  Range Cells { [return: MarshalAs(UnmanagedType.Interface)] [DispId(238)] get; }
}

Stacktrace :

at Mono.Cecil.Cil.CodeReader.IsInSection(Int32 rva) in Mono.Cecil.Cil\CodeReader.cs:line 88
at Mono.Cecil.Cil.CodeReader.MoveTo(Int32 rva) in Mono.Cecil.Cil\CodeReader.cs:line 78
at Mono.Cecil.Cil.CodeReader.ReadMethodBody() in Mono.Cecil.Cil\CodeReader.cs:line 93
at Mono.Cecil.Cil.CodeReader.ReadMethodBody(MethodDefinition method) in Mono.Cecil.Cil\CodeReader.cs:line 71
at Mono.Cecil.MetadataReader.ReadMethodBody(MethodDefinition method) in Mono.Cecil\AssemblyReader.cs:line 1830
at Mono.Cecil.MethodDefinition.<get_Body>b__2(MethodDefinition method, MetadataReader reader) in Mono.Cecil\MethodDefinition.cs:line 152
at Mono.Cecil.ModuleDefinition.Read[TItem,TRet](TItem item, Func`3 read) in Mono.Cecil\ModuleDefinition.cs:line 704
at Mono.Cecil.MethodDefinition.get_Body() in Mono.Cecil\MethodDefinition.cs:line 152

[jbevain]

Oh my. Where is the excell interop dll on your system?

[madgnome]

C:\Program Files\Microsoft Visual Studio 10.0\Visual Studio Tools for Office\PIA\Office14

but the dll is not in the gac.

[jbevain]

Never mind, extracted one from a msi.

[madgnome]

Same exception if the excell interop dll is in the gac or in cecil search directory.

[jbevain]

Somehow I can't seem to be able to compile a repro. Can you upload your dll somewhere?

[madgnome]

Sent by mail.

[jbevain]

Thanks.

I have a different exception though. When running:

foreach (var type in module.Types) {
foreach (var method in type.Methods) {
if (method.HasBody) {
Console.WriteLine (method.Body);
}
}
}

I don't get any exception. However, I do get a NRE when trying to save this assembly.

[jbevain]

Fixed in master. Thanks!

[madgnome]

Great! Thanks!