hphp/test/zend/good/ext-standard/bug49244.php.expectf

   1 {NaN} NaN
   2 {NaN} NaN
   3 {NaN} NaN
   4 {NaN} NaN
   5 {NaN} NaN
   6 {NaN} NaN
   7 {NaN} NaN
   8 {NaN} NaN
   9 {NaN} NaN
  10 {NaN} NaN
  11 {NaN} NaN
  12 {NaN} NaN
  13 {NaN} NaN
  14 {NaN} NaN
  15 {NaN} NaN
  16 {NaN} NaN
  17 {NaN} NaN
  18 {NaN} NaN
  19 {NaN} NaN
  20 {NaN} NaN