From 38724f2e866d01dde1e121662d3b792e598f69ef Mon Sep 17 00:00:00 2001
From: Michael Grant <mgrant@grant.org>
Date: Wed, 22 Oct 2025 23:37:58 +0100
Subject: [PATCH] Return error if you try to split a floating pane.

---
 cmd-split-window.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/cmd-split-window.c b/cmd-split-window.c
index 564f7daf..27e588b1 100644
--- a/cmd-split-window.c
+++ b/cmd-split-window.c
@@ -89,6 +89,11 @@ cmd_split_window_exec(struct cmd *self, struct cmdq_item *item)
 	struct args_value	*av;
 	u_int			 count = args_count(args), curval = 0;
 
+	if (wp->layout_cell == NULL) {
+		cmdq_error(item, "can't split a floating pane");
+		return (CMD_RETURN_ERROR);
+	}
+
 	type = LAYOUT_TOPBOTTOM;
 	if (args_has(args, 'h'))
 		type = LAYOUT_LEFTRIGHT;