anchor.diff:  	Result ->
   	    Result
       catch
  -	Class:Reason ->
  -            ST = erlang:get_stacktrace(),
  +	Class:Reason:ST ->
   	    {stop, {shutdown, {{Class, Reason}, ST}}, State}
       end.		
   
  
positive.code: 	Result ->
  	    Result
      catch
  	Class:Reason ->
              ST = erlang:get_stacktrace(),
  	    {stop, {shutdown, {{Class, Reason}, ST}}, State}
      end.		
  
  
negative.code: 	Result ->
  	    Result
      catch
  	Class:Reason:ST ->
  	    {stop, {shutdown, {{Class, Reason}, ST}}, State}
      end.		
  
  