* lisp/isearch.el: Avoid an error that blocks isearch

(isearch-update): Don't error if `isearch--current-buffer' has
been killed.

* test/automated/isearch-tests.el (isearch--test-update): New
file.

1 files changed, 1 insertions, 1 deletions

diff --git a/lisp/isearch.el b/lisp/isearch.el
index e9eec013580..b762884945e 100644
--- a/lisp/isearch.el
+++ b/lisp/isearch.el
@@ -954,7 +954,7 @@ used to set the value of `isearch-regexp-function'."
   "This is called after every isearch command to update the display.
 The last thing it does is to run `isearch-update-post-hook'."
   (unless (eq (current-buffer) isearch--current-buffer)
-    (when isearch--current-buffer
+    (when (buffer-live-p isearch--current-buffer)
       (with-current-buffer isearch--current-buffer
         (setq cursor-sensor-inhibit (delq 'isearch cursor-sensor-inhibit))))
     (setq isearch--current-buffer (current-buffer))