anchor.diff:  		    error
   	    end;
   	{error, Error} ->
  -	    log:log("error~n~p~n", [Error]),
  +	    log:log("error: ~p~n", [Error]),
   	    %% Delete `used` table.
   	    ets:delete(used),
   	    error
  
positive.code: %%   Msg -> [Actions]
  %% to
  %%   {SenderPid, Msg} -> {SenderPid, Msg, [Actions]}
  %%
  %% (temporarily Msg -> {Msg, [Actions]})
  transform_receive_clause(Clause) ->
      [OldPattern] = erl_syntax:clause_patterns(Clause),
      OldGuard = erl_syntax:clause_guard(Clause),
  
negative.code: 			    instrument_spawn(instrument_subtrees(Tree));
  			link ->
  			    instrument_link(instrument_subtrees(Tree));
  			_Other -> instrument_subtrees(Tree)
  		    end;
  		_Other -> instrument_subtrees(Tree)
  	    end;
  	infix_expr ->
  	    Operator = erl_syntax:infix_expr_operator(Tree),
  	    case erl_syntax:operator_name(Operator) of
  		'!' -> instrument_send(instrument_subtrees(Tree));
  		_Other -> instrument_subtrees(Tree)
  	    end;
  	receive_expr ->
  	    instrument_receive(instrument_subtrees(Tree));
  