1

To simplify the problem, run following command will get the same error

:py3 print(vim.eval('"\\<bs>"'))

And the real situation is

while 1:
    vimcmd("let nr = getchar()")
    vimcmd("let ch = type(nr) ? nr : nr2char(nr)")
    if vimeval('ch == "\\<bs>"') == '1':
        dosomething
    ...
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7
  • Just a guess but maybe related to :h Linux-backspace ...?
    – B Layer
    Dec 21, 2020 at 12:33
  • Other folks have historically had problems with backspace. In addition to the help section above there's :h :fixdel and this from Vim wiki: vim.fandom.com/wiki/Backspace_and_delete_problems . ... perhaps some clues can be found there.
    – B Layer
    Dec 21, 2020 at 12:41
  • @BLayer I have no problem using backspace with vim when editing file. Have you run :py3 print(vim.eval('"\\<bs>"')) and what is the result?
    – ZhiyuanLck
    Dec 21, 2020 at 13:11
  • @BLayer Thanks for the information you provide and sorry for my word. I do not fill you bothered but want to know that you think the possible reason is more about linux or terminals but not vim itself? This is first time I came with this error.
    – ZhiyuanLck
    Dec 21, 2020 at 14:40
  • 1
    github.com/vim/vim/issues/1053#issuecomment-749006074
    – user938271
    Dec 21, 2020 at 14:42

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