the fix is not complete - but it does fix your specific case (assuming you nothing else named BigDecimal) thus i suggest if you urgently need it simply build it from source and use tha.
And no, it will not be merged in to 3.2.4 (many years old), it would be put on 3.5.x-4.0.x once we get a full fix that looks at the full typename and not just the last part of the typename.