rename doesn't move child files

[mmckegg]

Failing test:

test('rename', function(fs, t) {
    fs.mkdir('/foo', function() {
        fs.writeFile('/foo/file', 'content', function(err){ // add a child file
            t.notOk(err);
            fs.rename('/foo', '/bar', function(err) {
                t.notOk(err);
                fs.readdir('/', function(err, list) {
                    t.notOk(err);
                    t.same(list, ['bar']);

                    // check to make sure file was moved
                    fs.readdir('/bar', function(err, list){
                        t.notOk(err);
                        t.same(list, ['content']);

                        fs.readFile('/foo/file', 'utf8', function(err, result){
                            t.ok(err)
                            t.notOk(result)
                            t.end();
                        })
                    })
                });
            });
        })
    });
});

The old file "/foo/file" still exists, and fs.readdir('/bar', cb) calls back with empty list.