From 99b768c06019e904f0c283c00779e3f080309b59 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=88=B1=E7=89=B9=E6=AF=8F=E7=BE=8A=E9=98=9F?=
 <t2026104239910027@eduxiji.net>
Date: Tue, 9 Jun 2026 21:07:08 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E5=A4=8D=E5=BC=82=E5=B8=B8=20S?=
 =?UTF-8?q?hape=20=E6=9C=AA=E6=A0=A1=E9=AA=8C=E9=97=AE=E9=A2=98?=
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---
 crates/oxide_kernel/src/shape_forge.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/crates/oxide_kernel/src/shape_forge.rs b/crates/oxide_kernel/src/shape_forge.rs
index f614fa9..761db47 100644
--- a/crates/oxide_kernel/src/shape_forge.rs
+++ b/crates/oxide_kernel/src/shape_forge.rs
@@ -47,6 +47,9 @@ impl ShapeForge {
     }
 
     fn compute_depth(shape_id: ShapeId, shapes: &[Option<Arc<Shape>>]) -> u32 {
+        if shape_id == 0 {
+            return 0;
+        }
         let mut count = 0u32;
         let mut cursor = Some(shape_id);
         while let Some(id) = cursor {