node.js bug

bug.js

var FILENAME = "/some/pretty/big/file",
    BSIZE = 1024 * 1024;

var fs = require('fs');
var foo = [];

fs.stat(FILENAME, function(err, stats) {
  if (err) throw err;
  var size = stats.size;
  if (size < BSIZE * 50) {
    throw new Error("You should provide a bigger file");
  }
  
  fs.open(FILENAME, "r", function(err, fd) {
    if (err) throw err;
    
    function doReads() {
      for (var i = 0; i < 100; i++) {
        var buffer = new Buffer(BSIZE);

        /* Uncomment this line to avoid the bug */
        //foo.push(buffer);
        
        /* The random offset does not cause the bug but ensures the reads are slow */
        var offset = Math.floor(Math.random() * (size - BSIZE));
        fs.read(fd, buffer, 0, BSIZE, offset, afterRead);
      }
    }
    
    function afterRead(err, bytes) {
      if (err) console.log('read error: ' + err.message);
      else console.log('read ok: ' + bytes);
    }
    
    doReads();
  });
});