Question about Room.lookForAtArea call

nugarin

I am trying to find all structures on a given area with the said function.
Function works fine for terrain etc., but it fails to return more than one structure per tile. I am not sure that it's supposed to return more than one, but the {...} in the docs game this impression.

Function fails to return the rampart that has an extension built on it.

function findStructures(spawn){

var area = spawn.room.lookForAtArea('structure', spawn.pos.y - 1, spawn.pos.x - 1, spawn.pos.y + 1, spawn.pos.x + 1);

var ramparts = [];
var roads = [];
var blocked = [];

_.each(area, function(col, y){
    _.each(col, function(cell, x){
     do{  
         //console.log("pos "+ x + " "+ y + " " + cell.length, cell);
         var c = cell.length ? cell.shift() : cell;

         if (c.structureType == STRUCTURE_RAMPART){
             ramparts.push(""+ x + "_" + y);
         }else if (c.structureType == STRUCTURE_ROAD){
             roads.push(""+ x + "_" + y);
         }else{
             blocked.push(""+ x + "_" + y);
         }
     }while(cell.length);
 });
});

//console.log("ramparts 1st"+ found[0]);
spawn.room.memory.ramparts = ramparts;
spawn.room.memory.roads = roads;
spawn.room.memory.blocked = blocked;

}

nugarin

lookForAtArea is definetely broken - some map cells have more than one tarrain - wall and swamp for instance - lookAt returns both of them.