# To force a version qualifier update add the bug here
Bug 511251 - Comparator errors in I20170127-2200
Bug 521182 - [compiler] method reference on null object should throw NPE at runtime (JLS compliance)
Bug 572789 - Comparator errors in I20210412-1800 after moving to compiler from 4.20 M1
Bug 527899 [9] Implement JEP 280: Indify String Concatenation