From 803b8815bd7a61fb050f4dde83f0f3446e045c09 Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Thu, 29 Mar 2018 08:03:51 +0000
Subject: [PATCH] Do not crash on empty window, reported by Jamie Macdonald in
 GitHub issue 1299. Patch from Thomas Adam.

---
 window-tree.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/window-tree.c b/window-tree.c
index 8a327bb6..926eaec1 100644
--- a/window-tree.c
+++ b/window-tree.c
@@ -296,7 +296,8 @@ window_tree_build_window(struct session *s, struct winlink *wl, void* modedata,
 	free(text);
 	free(name);
 
-	wp = TAILQ_FIRST(&wl->window->panes);
+	if ((wp = TAILQ_FIRST(&wl->window->panes)) == NULL)
+		goto empty;
 	if (TAILQ_NEXT(wp, entry) == NULL) {
 		if (!window_tree_filter_pane(s, wl, wp, filter))
 			goto empty;