From f72b7846929b5281fa8d7c9093c00cd965718ecb Mon Sep 17 00:00:00 2001
From: Jeremy Wootten <jeremywootten@gmail.com>
Date: Tue, 17 Jun 2025 11:56:35 +0100
Subject: [PATCH] Ensure cast to ExpandableItem is possible

---
 src/SymbolPane/Vala/ValaSymbolOutline.vala | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/SymbolPane/Vala/ValaSymbolOutline.vala b/src/SymbolPane/Vala/ValaSymbolOutline.vala
index 9b038aa42..5d27e74cd 100644
--- a/src/SymbolPane/Vala/ValaSymbolOutline.vala
+++ b/src/SymbolPane/Vala/ValaSymbolOutline.vala
@@ -147,7 +147,9 @@ public class Scratch.Services.ValaSymbolOutline : Scratch.Services.SymbolOutline
 
     protected override void add_tooltips (Code.Widgets.SourceList.ExpandableItem root) {
         foreach (var parent in root.children) {
-            add_tooltip ((Code.Widgets.SourceList.ExpandableItem) parent);
+            if (parent is Code.Widgets.SourceList.ExpandableItem) {
+                add_tooltip ((Code.Widgets.SourceList.ExpandableItem) parent);
+            }
         }
     }