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vim-patch:9.1.1323: b:undo_ftplugin not executed when re-using buffer

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Problem:  b:undo_ftplugin not executed when re-using buffer
          (archy3)
Solution: explicitly execute b:undo_ftplugin in buflist_new() when
          re-using the current buffer

fixes: vim/vim#17113
closes: vim/vim#17133

baa8c90cc0

Cherry-pick test_filetype.vim changes from patch 9.1.1325.

Co-authored-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
zeertzjq
2026-01-14 09:37:53 +08:00
parent 92596a37e7
commit 328640aed0
3 changed files with 43 additions and 2 deletions
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13
src/nvim/buffer.c
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@@ -129,6 +129,18 @@ typedef enum {
kBffInitChangedtick = 2,
} BufFreeFlags;
static void trigger_undo_ftplugin(buf_T *buf, win_T *win)
{
window_layout_lock();
buf->b_locked++;
win->w_locked = true;
// b:undo_ftplugin may be set, undo it
do_cmdline_cmd("if exists('b:undo_ftplugin') | exe b:undo_ftplugin | endif");
buf->b_locked--;
win->w_locked = false;
window_layout_unlock();
}
/// Calculate the percentage that `part` is of the `whole`.
int calc_percentage(int64_t part, int64_t whole)
{
@@ -1945,6 +1957,7 @@ buf_T *buflist_new(char *ffname_arg, char *sfname_arg, linenr_T lnum, int flags)
assert(curbuf != NULL);
buf = curbuf;
set_bufref(&bufref, buf);
trigger_undo_ftplugin(buf, curwin);
// It's like this buffer is deleted. Watch out for autocommands that
// change curbuf! If that happens, allocate a new buffer anyway.
buf_freeall(buf, BFA_WIPE | BFA_DEL);