Combining dependencies with data providers

I have one test method that depends on another method that itself uses a data provider in PHPUnit:

/** 
 * @dataProvider getFields
 */
public function testCanDoSomeStuff($parm1, $parm2) {
  $result = my_func($parm1, $parm2);
  $this->assertNotNull($result);

  return $result;
}

/**
 * @depends testCanDoSomeStuff
 */
public function testCanDoSomeMoreStuff($result) {
  $this->assertNotNull($result);
}

I also have a getFields() data provider function, no need to show that here.

The first test that relies on the data provider passes - $result is NOT null.

I expect that the result of the test will be passed to the dependent test as the $result parameter. However, the testCanDoSomeMoreStuff function receives a NULL parameter and the test fails.

Update

This simple test case demonstrates the problem:

class MyTest extends PHPUnit_Framework_TestCase {

    /**
     * @dataProvider myFunc
     */
    public function testCanDoSomeStuff($value) {
        $this->assertNotNull($value);
        return $value;
    }

    /**
     * @depends testCanDoSomeStuff
     */
    public function testCanDoSomeMoreStuff($value) {
        $this->assertNotNull($value);
    }

    /**
     * Data provider function
     */
    public function myFunc() {
      $values = array('22');
      return array($values);
    }
}

As a workaround for now, I've stored the result in a static property between tests.