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fix(aucmd_win): ensure aucmd_win stays floating

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Nvim uses a floating window for the autocmd window, but in certain situations,
it can be made non-floating (`:wincmd J`), which can cause issues due to the
previous setup and cleanup logic for a non-floating aucmd_win being removed from
aucmd_prepbuf and aucmd_restbuf.

This can cause glitchiness and crashes due to the aucmd_win's frame being
invalid after closing its tabpage, for example.

Ensure aucmd_win cannot be made non-floating. The only place this happens is in
win_split_ins if new_wp != NULL.
This commit is contained in:
Sean Dewar
2021-12-31 09:32:04 +00:00
parent 30c9c8815b
commit 2deffb5ea8
3 changed files with 72 additions and 0 deletions
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5
src/nvim/window.c
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@@ -958,6 +958,11 @@ int win_split_ins(int size, int flags, win_T *new_wp, int dir)
int wmh1;
bool did_set_fraction = false;
// aucmd_win should always remain floating
if (new_wp != NULL && new_wp == aucmd_win) {
return FAIL;
}
if (flags & WSP_TOP) {
oldwin = firstwin;
} else if (flags & WSP_BOT || curwin->w_floating) {