Format (Ctrl F7) does not work in 4.2.17

the parser doesn't understand or like something in your code - that's our fault, not yours

In the next drop, the formatter will format as much as it can and try to ignore the code it doesn't understand vs not format any of it

SQL Developer's parser, the one that runs in SQLDev, and knows how to do things like format your code, syntax color your text, warn you on syntax issues BEFORE you execute it...yes.