[NTG-context] linebreak error: no leftinit or rightinit or leftfill or rigthfill expected

I mistakenly sent the following letter to luatex@tug.org yesterday. I hope it won't cause anyone any trouble. Thanks to luigi for pointing out the error. ------------------------------------------------- Hi all, I just updated my ConTeXt to system > ConTeXt ver: 2022.07.06 21:42 LMTX fmt: 2022.7.12 int: english/english yesterday and got a error message in using tex.linebreak(head) as follow: luatex warning > linebreak: no [ leftinit | rightinit | leftfill | rigthfill] expected I can't get any information about them. The head and the list going to tex.linebreak() like: 2873 : par vmodepar> 2879 : glue indentskip> 2891 : glyph unset> 2897 : glue userskip> ... 639 : glyph unset> 3089 : kern userkern> 2334 : glue userskip> 3095 : rule normal> 3101 : glue spaceskip> 642 : glue spaceskip> 3107 : penalty userpenalty> nil : glue userskip> My question is: Which of them is necessary, and How can I node.new() one and Where should it go in the list? Any hint would be appreciated, Huang Fusyong(黄复雄)