From cae229cadc28d578e20942c7e964741ad71aba15 Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Tue, 5 May 2026 12:02:12 +0000
Subject: [PATCH] Discard queued data and clear offsets when turning pane off
 to prevent later read of data that has been removed. From Aaron Campbell in
 GitHub issue 5054.

---
 control.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/control.c b/control.c
index f7fb761c..4a7201ef 100644
--- a/control.c
+++ b/control.c
@@ -356,6 +356,9 @@ control_set_pane_off(struct client *c, struct window_pane *wp)
 	struct control_pane	*cp;
 
 	cp = control_add_pane(c, wp);
+	control_discard_pane(c, cp);
+	memcpy(&cp->offset, &wp->offset, sizeof cp->offset);
+	memcpy(&cp->queued, &wp->offset, sizeof cp->queued);
 	cp->flags |= CONTROL_PANE_OFF;
 }