[vim/vim] Parsing error with heredoc that contains keywords such as change, append, insert, etc. (Issue #9074)

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Jongwook Choi

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Oct 31, 2021, 6:33:56 PM10/31/21
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Steps to reproduce

$ vim -u NONE
:source foo.vim

foo.vim:

function RunLua() abort
lua<<EOF
local foo = {
    change = {},
    insert = {},
    append = {},
}
EOF
endfunction

What happens:

E126: Missing :endfunction

Expected behaviour

The heredoc block should run without any errors -- even if the heredoc script contains a word like change, append, insert, etc. Those words are some kind of special directives (see :lua-heredoc) but they impact on parsing function ... endfunction blocks.

Operating system

macOS

Version of Vim

Vim 8.2 and Nightly

Logs and stack traces

See https://github.com/neovim/neovim/issues/16136 for the downstream issue on Neovim. I believe this is a vim bug.

Implementation of parsing heredoc: https://github.com/vim/vim/blob/master/src/userfunc.c#L940

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Yegappan Lakshmanan

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Nov 5, 2021, 9:26:07 PM11/5/21
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Hi,

I am not able to reproduce this problem with the latest version of Vim (with one minor modification
described below). Can you try to reproduce this problem with the latest version of Vim?

On Sun, Oct 31, 2021 at 3:33 PM Jongwook Choi <vim-dev...@256bit.org> wrote:

Steps to reproduce

$ vim -u NONE
:source foo.vim

foo.vim:

function RunLua() abort
lua<<EOF

You should add a space around "<<".

- Yegappan

vim-dev ML

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Nov 5, 2021, 9:26:21 PM11/5/21
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Hi,

I am not able to reproduce this problem with the latest version of Vim
(with one minor modification
described below). Can you try to reproduce this problem with the latest
version of Vim?

On Sun, Oct 31, 2021 at 3:33 PM Jongwook Choi ***@***.***>
wrote:


> Steps to reproduce
>
> $ vim -u NONE
> :source foo.vim
>
> foo.vim:
>
> function RunLua() abort
> lua<<EOF
>
>
You should add a space around "<<".

- Yegappan


>

zeertzjq

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Nov 5, 2021, 10:32:02 PM11/5/21
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Indeed, when lua<<EOF is changed to lua <<EOF the error can no longer be reproduced in either Vim or Nvim.

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zeertzjq

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Nov 5, 2021, 10:33:49 PM11/5/21
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And this is also what the documentation says:

:[range]lua << [endmarker]
{script}
{endmarker}

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Christian Brabandt

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Nov 6, 2021, 3:27:42 AM11/6/21
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closing then.

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Christian Brabandt

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Nov 6, 2021, 3:27:44 AM11/6/21
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Closed #9074.

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