chore(ai snapshot): dont error on navigating childframe (#35951)

packages/playwright-core/src/server/page.ts

@@ -1024,8 +1024,12 @@ async function snapshotFrameForAI(frame: frames.Frame, frameOrdinal: number, fra
     }
     const frameOrdinal = frameIds.length + 1;
     frameIds.push(child.frame._id);
-    const childSnapshot = await snapshotFrameForAI(child.frame, frameOrdinal, frameIds);
-    result.push(line + ':', ...childSnapshot.map(l => leadingSpace + '  ' + l));
+    try {
+      const childSnapshot = await snapshotFrameForAI(child.frame, frameOrdinal, frameIds);
+      result.push(line + ':', ...childSnapshot.map(l => leadingSpace + '  ' + l));
+    } catch {
+      result.push(line);
+    }
   }
   return result;
 }

tests/assets/redirectloop1.html

@@ -1,8 +1,9 @@
 <script>
   setTimeout(() => {
+    const depth = new URLSearchParams(window.location.hash).get('depth') ?? '10';
     const iter = window.localStorage.iter || '';
     window.localStorage.iter = iter + 'a';
-    if (iter.length === 10)
+    if (iter.length === +depth)
       return;
     window.location.href = window.location.href.replace('loop1', 'loop2');
   }, 1);

tests/page/page-aria-snapshot-ai.spec.ts

@@ -218,3 +218,16 @@ it('should include cursor pointer hint', async ({ page }) => {
     - button \"Button\" [ref=e2] [cursor=pointer]
   `);
 });
+
+it('should gracefully fallback when child frame cant be captured', async ({ page, server }) => {
+  await page.setContent(`
+    <p>Test</p>
+    <iframe src="${server.PREFIX}/redirectloop1.html#depth=100000"></iframe>
+  `, { waitUntil: 'domcontentloaded' });
+  const snapshot = await snapshotForAI(page);
+  expect(snapshot).toContainYaml(`
+    - generic [ref=e1]:
+      - paragraph [ref=e2]: Test
+      - iframe [ref=e3]
+  `);
+});