[feedback-loop.html]
  bug: https://github.com/servo/servo/issues/21288
  [WebGL test #3: getError expected: INVALID_OPERATION. Was NO_ERROR : after draw with invalid feedback loop]
    expected: FAIL

  [WebGL test #5: Should be blue.\nat (0, 0) expected: 0,0,255,255 was 0,255,0,255]
    expected: FAIL