1 files changed, 7 insertions, 4 deletions
diff --git a/src/nvim/api/vim.c b/src/nvim/api/vim.c
index 6a0a4c4e0a..f80d605d9a 100644
--- a/src/nvim/api/vim.c
+++ b/src/nvim/api/vim.c
@@ -1360,7 +1360,9 @@ void nvim_chan_send(Integer chan, String data, Error *err)
 ///   - `bufpos`: Places float relative to buffer text (only when
 ///               relative="win"). Takes a tuple of zero-indexed [line, column].
 ///               `row` and `col` if given are applied relative to this
-///               position, else they default to `row=1` and `col=0`
+///               position, else they default to:
+///               - `row=1` and `col=0` if `anchor` is "NW" or "NE"
+///               - `row=0` and `col=0` if `anchor` is "SW" or "SE"
 ///               (thus like a tooltip near the buffer text).
 ///   - `row`: Row position in units of "screen cell height", may be fractional.
 ///   - `col`: Column position in units of "screen cell width", may be
@@ -1437,13 +1439,14 @@ Window nvim_open_win(Buffer buffer, Boolean enter, Dict(float_config) *config, E
   if (enter) {
     win_enter(wp, false);
   }
+  // autocmds in win_enter or win_set_buf below may close the window
+  if (win_valid(wp) && buffer > 0) {
+    win_set_buf(wp->handle, buffer, fconfig.noautocmd, err);
+  }
   if (!win_valid(wp)) {
     api_set_error(err, kErrorTypeException, "Window was closed immediately");
     return 0;
   }
-  if (buffer > 0) {
-    win_set_buf(wp->handle, buffer, fconfig.noautocmd, err);
-  }
 
   if (fconfig.style == kWinStyleMinimal) {
     win_set_minimal_style(wp);