emacs-28 68d134cf0f: Don't check whether a deleted window is deletable (Bug#54028)

[Martin Rudalics]

branch: emacs-28
commit 68d134cf0f784601e50cefc4056eb0ace510a982
Author: Martin Rudalics <rudalics@gmx.at>
Commit: Martin Rudalics <rudalics@gmx.at>

    Don't check whether a deleted window is deletable (Bug#54028)
    
    * lisp/window.el (window-state-put): Make sure window is live
    before calling 'window-deletable-p' on it (Bug#54028).
---
 lisp/window.el | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lisp/window.el b/lisp/window.el
index d9f36b9801..a47a1216d1 100644
--- a/lisp/window.el
+++ b/lisp/window.el
@@ -6410,7 +6410,11 @@ windows can get as small as `window-safe-min-height' and
        (window--state-put-2 ignore pixelwise))
       (while window-state-put-stale-windows
        (let ((window (pop window-state-put-stale-windows)))
-         (when (eq (window-deletable-p window) t)
+          ;; Avoid that 'window-deletable-p' throws an error if window
+          ;; was already deleted when exiting 'with-temp-buffer' above
+          ;; (Bug#54028).
+         (when (and (window-valid-p window)
+                     (eq (window-deletable-p window) t))
            (delete-window window))))
       (window--check frame))))