anchor.diff:                  try 
                       (AssemblyDefinition.ReadAssembly path, FileInfo(path)) |> Some
                   with
  -                | _ -> None
  +                | :? BadImageFormatException -> None
               )
               |> Seq.choose id
               |> dict
  
positive.code:                     try
                          (AssemblyDefinition.ReadAssembly (f.FullName:string), f) |> 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
  