ERROR, "there should be no errors binding a buffer to the default transform feedback");

  runFeedback(gl, prog, srcVAO1, tf);
  wtu.glErrorShouldBe(gl, gl.NO_ERROR, "there should be no errors having drawn with the default transform feedback");

  const expected = [2, 4, 6];
  gl.bindBuffer(gl.TRANSFORM_FEEDBACK_BUFFER, dstBuffer);
  wtu.checkFloatBuffer(gl, gl.TRANSFORM_FEEDBACK_BUFFER, expected);
  wtu.glErrorShouldBe(gl, gl.NO_ERROR, "there should be no errors after readback");
}

function runFeedback(gl