anchor.diff:           S
         }
      catch
  -      {error, {badmatch, {error, Reason}}} ->
  +      {badmatch, {error, Reason}} ->
            {reply, {error, Uri, Reason}, 'LISTEN', S};
         {error, Reason} -> 
            {reply, {error, Uri, Reason}, 'LISTEN', S}
  
positive.code:       ok  = check_method(Mthd, Mod:allowed_methods(Tag)),
        request(Mod, Tag, Req, S)
     catch
        {error, {badmatch, {error, Reason}}} ->
           {reply, {error, Uri, Reason}, 'LISTEN', S};
        {error, Reason} -> 
           {reply, {error, Uri, Reason}, 'LISTEN', S}
  
negative.code:          S
        }
     catch
        {badmatch, {error, Reason}} ->
           {reply, {error, Uri, Reason}, 'LISTEN', S};
        {error, Reason} -> 
           {reply, {error, Uri, Reason}, 'LISTEN', S}
  