patch 8.2.3423: Vim9: list += list creates a new list in :def function Commit: https://github.com/vim/vim/commit/07802044b90b2cbcc64b2dfe235f019d7c37589c Author: Bram Moolenaar <Bram@vim.org> Date: Thu Sep 9 23:01:14 2021 +0200 patch 8.2.3423: Vim9: list += list creates a new list in :def function Problem: Vim9: list += list creates a new list in :def function. Solution: Append to the existing list.

" Test for Vim9 script with failures, causing memory leaks to be reported.
" The leaks happen after a fork() and can be ignored.

def Test_assignment()
  if has('channel')
    var chan1: channel
    var job1: job
    var job2: job = job_start('willfail')
  endif
enddef