diff --git a/vscode/src/codeReader/rules/pydantic.test.ts b/vscode/src/codeReader/rules/pydantic.test.ts
index 4374538..e81ead5 100644
--- a/vscode/src/codeReader/rules/pydantic.test.ts
+++ b/vscode/src/codeReader/rules/pydantic.test.ts
@@ -262,8 +262,8 @@ describe('pydantic 库规则（Python）', () => {
     const traceFields = properties(trace).findIndex(row => row.label === '字段')
     const cell = traceChange.marks?.rows?.changed[traceFields].items?.changed[2].cells?.[2]
     expect(cell?.map(part => part.change)).toEqual(['del', 'add'])
-    expect(cell?.[0].segments.map(segment => segment.text).join('')).toBe('空')
-    expect(cell?.[1].segments.map(segment => segment.text).join('')).toBe('""')
+    expect(flatSegments(cell?.[0].segments ?? []).map(segment => segment.text).join('')).toBe('空')
+    expect(flatSegments(cell?.[1].segments ?? []).map(segment => segment.text).join('')).toBe('""')
     expect(diff.stats).toEqual({ add: 0, mod: 2, del: 0 })
   })
 })
diff --git a/vscode/src/codeReader/rules/pydantic.ts b/vscode/src/codeReader/rules/pydantic.ts
index 3a408c3..81656c8 100644
--- a/vscode/src/codeReader/rules/pydantic.ts
+++ b/vscode/src/codeReader/rules/pydantic.ts
@@ -161,6 +161,8 @@ function namesInSource(root: Node): LibraryNames {
   for (const statement of syntaxChildren(root)) {
     if (statement.type === 'import_statement') {
       for (const item of statement.childrenForFieldName('name')) {
+        if (!item)
+          continue
         const original = item.type === 'aliased_import' ? item.childForFieldName('name') : item
         const alias = item.type === 'aliased_import' ? item.childForFieldName('alias') : null
         if (original && fromPydantic(original.text))
@@ -173,6 +175,8 @@ function namesInSource(root: Node): LibraryNames {
     if (!module || !fromPydantic(module.text))
       continue
     for (const item of statement.childrenForFieldName('name')) {
+      if (!item)
+        continue
       const original = item.type === 'aliased_import' ? item.childForFieldName('name') : item
       const alias = item.type === 'aliased_import' ? item.childForFieldName('alias') : null
       if (original)