anchor.diff:  
       #if ONEPASS
       ScopeChain = ref []
  -    MissingClosures = null
  -    ContainedScopes = null
       #endif
     }
     
  
positive.code: 
      #if ONEPASS
      ScopeChain : Scope ref list ref
      MissingClosures : Dict<string, List<Scope ref>>
      ContainedScopes : Dict<uint64, List<Scope ref>>
      #endif
    } 
      #if DEBUG
  
negative.code:     // Build the current scope
      let scope = p |> buildScope
  
      // Parse the body within it's enclosing scope chain
      p |> schain |> AnalyzersFastUtils.ScopeChain.push scope
      let body = p |> block
  