test(webkit): document a webkit transition crash from 42637

tests/page/page-transition.spec.ts

@@ -0,0 +1,45 @@
+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { test as it, expect } from './pageTest';
+
+it('should not crash when filter transition completes', async ({ page, browserName }) => {
+  it.info().annotations.push({ type: 'issue', description: 'https://github.com/microsoft/playwright/issues/42637' });
+  it.fixme(browserName === 'webkit', 'Web process crashes on the compositor thread when a filter transitions to none');
+
+  await page.setContent(`
+    <style>
+      div { transition: filter 0.1s; }
+      .dim { filter: brightness(0.95); }
+    </style>
+    ${'<div>hello</div>'.repeat(10)}
+  `);
+  let crashed = false;
+  page.on('crash', () => crashed = true);
+  for (let i = 0; i < 10 && !crashed; i++) {
+    await page.evaluate(async () => {
+      const divs = [...document.querySelectorAll('div')];
+      const settled = () => Promise.all(divs.map(div => new Promise(f => div.addEventListener('transitionend', f, { once: true }))));
+      let promise = settled();
+      divs.forEach(div => div.classList.add('dim'));
+      await promise;
+      promise = settled();
+      divs.forEach(div => div.classList.remove('dim'));
+      await promise;
+    }).catch(() => {});
+  }
+  expect(crashed).toBe(false);
+});