patch 8.2.4286: Vim9: strict type checking after copy() and deepcopy() Commit: https://github.com/vim/vim/commit/381692b6f1c2ec9b73a139500286ddc9347a1c01 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Feb 2 20:01:27 2022 +0000 patch 8.2.4286: Vim9: strict type checking after copy() and deepcopy() Problem: Vim9: strict type checking after copy() and deepcopy(). Solution: Allow type to change after making a copy. (closes https://github.com/vim/vim/issues/9644)

let g:loaded_foo_vim += 1

let foo#bar = {}

func foo#bar.echo()
  let g:called_foo_bar_echo += 1
endfunc

func foo#addFoo(head)
  return a:head .. 'foo'
endfunc

func foo#()
  return 'empty'
endfunc