var x = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,gc(),
         ];
assertEq(x.length, 500);
assertEq(x[10], 11);
assertEq(x[90], 11);

function stringify(a) {
  var b = "";
  for (var c in a) { b += c + ","; }
  return b;
}

var y = {a:1,b:2,c:3,d:4,e:gc(),f:6,g:7,h:8,i:9,j:gc(),
         k:11,l:12,m:13,n:14,o:gc(),p:16,q:17,r:18,s:19,t:gc()};

assertEq(stringify(y), "a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,");