Matej Novotny FWIW, I looked at this quickly. I see a test was added for this case, but it fails presently - https://github.com/weld/core/commit/a132ec13d1b586cab92a7723aac932a9226f1a27#diff-775ddd78d13920c374858747a791d6df

The first assertion is what's failing Assert.assertTrue(SealedBean.class.getPackage().isSealed());