From e170824e9865ca70248e71054436108fb2572de2 Mon Sep 17 00:00:00 2001
From: Chris McKenzie <kristopolous@yahoo.com>
Date: Mon, 20 Mar 2023 18:14:12 -0700
Subject: [PATCH] a cheap fix to prevent the crash described in #334 from
 happening

---
 mod_tiling/ops.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/mod_tiling/ops.c b/mod_tiling/ops.c
index 0bd21912d..bc5059d9f 100644
--- a/mod_tiling/ops.c
+++ b/mod_tiling/ops.c
@@ -147,13 +147,20 @@ bool mod_tiling_untile(WTiling *tiling)
 
         reg2=group_do_attach(grp, &param, &data);
 
+        // See #334: tiling->unsplit from the context menu crashes notion
+        if(tiling->managed_list == NULL) {
+            break;
+        }
+
         if(reg2==NULL)
             warn(TR("Unable to move a region from tiling to group."));
     }
 
     tiling->batchop=FALSE;
 
-    region_dispose((WRegion*)tiling);
+    if(tiling->managed_list != NULL) {
+        region_dispose((WRegion*)tiling);
+    }
 
     return TRUE;
 }