Don't bug out in `Info-goto-node' completion

* lisp/info.el (Info-read-node-name-1): Don't bug out in the
middle of completion, but return nil instead (and issue a message)
(bug#47771).

1 files changed, 2 insertions, 1 deletions

diff --git a/lisp/info.el b/lisp/info.el
index 82f0eb37ae9..67d27c78988 100644
--- a/lisp/info.el
+++ b/lisp/info.el
@@ -1855,7 +1855,8 @@ See `completing-read' for a description of arguments and usage."
          (lambda (string pred action)
            (complete-with-action
             action
-            (Info-build-node-completions (Info-find-file file1 nil t))
+            (when-let ((file2 (Info-find-file file1 'noerror t)))
+              (Info-build-node-completions file2))
             string pred))
          nodename predicate code))))
    ;; Otherwise use Info-read-node-completion-table.