anchor.diff:                      try
                           (AssemblyDefinition.ReadAssembly (f.FullName:string), f) |> Some
                       with
  -                    | _ -> None)
  +                    | :? BadImageFormatException -> None)
                   |> Seq.choose id
                   |> dict
   
  
positive.code:                 try 
                      (AssemblyDefinition.ReadAssembly path, FileInfo(path)) |> Some
                  with
                  | _ -> None
              )
              |> Seq.choose id
              |> dict
  
negative.code: open System.Collections.Generic
  open Logging
  open ProviderImplementation.AssemblyReader.Utils.SHA1
  open System
  
  // Needs an update so that all work is not done at once
  // computation should be done on a per group/per framework basis
  