ivy.el (ivy--update-minibuffer): allow to resumed using staled data f…

…rom dynamic collection

ivy.el

@@ -1178,6 +1178,10 @@ If the text hasn't changed as a result, forward to `ivy-alt-done'."
   (setq ivy-exit 'done)
   (exit-minibuffer))
 
+(defcustom ivy-resume-with-staled-data nil
+  "Allow to use staled results when resuming from dynamic collection."
+  :type 'boolean)
+
 (defun ivy--restore-session (&optional session)
   "Resume a recorded completion SESSION, if any exists."
   (when ivy--sessions
@@ -1196,14 +1200,16 @@ If the text hasn't changed as a result, forward to `ivy-alt-done'."
       (setq ivy--all-candidates (plist-get data :all-candidates))
       (setq ivy-text (plist-get data :text)))))
 
+
 ;;;###autoload
 (defun ivy-resume (&optional session)
   "Resume the last completion session, or SESSION if non-nil.
 With a prefix arg, try to restore a recorded completion session,
 if one exists."
   (interactive)
   (when (or current-prefix-arg session)
-    (ivy--restore-session session))
+    (ivy--restore-session session)
+    (setq this-command 'ivy-resume))
 
   (if (or (null (ivy-state-action ivy-last))
           (eq (ivy--get-action ivy-last) #'identity))
@@ -3300,7 +3306,10 @@ Should be run via minibuffer `post-command-hook'."
             (unless (or (equal ivy--old-text ivy-text)
                         (eq this-command 'ivy-resume))
               (while-no-input
-                (setq coll (ivy--dynamic-collection-cands ivy-text))
+                (setq coll (if (and ivy-resume-with-staled-data
+                                    ivy--trying-to-resume-dynamic-collection)
+                               ivy--all-candidates
+                             (ivy--dynamic-collection-cands ivy-text)))
                 (when (eq coll 0)
                   (setq coll nil)
                   (setq ivy--old-re nil)