Flutter web tests are crashing Chrome, then timing out on CI builder #61462
Description
The Dart team's integration test builder for flutter/engine/dart tip-of-tree has started throwing an exception from Chrome, then timing out on all tests after that, taking 12 minutes to time out, which makes the builder take an extra half hour.
I'm not sure whether a change in our Chrome version is doing that, or some change in Flutter.
We need to get the web tests passing, to turn the builder green, and also to fix this time regression.
The builder is at https://ci.chromium.org/p/dart/builders/ci.sandbox/flutter-engine-linux
and a failing build is at: https://ci.chromium.org/p/dart/builders/ci.sandbox/flutter-engine-linux/11234
The step is "flutter test web_tests", and it takes 90 minutes when it fails due to this Chrome crash and timeouts, 60 minutes when passing.
I am just about to update the checked-in version of Chrome the Dart builders use to run tests. I don't know if this will change
the version used by this builder, I can look into it.
However, a new, passing build has finished since I started writing this issue. Is there a fix that has landed for this problem in that blamelist, or could this still be a flaky problem we need to fix?
02:34 +354 ~3: loading /b/s/w/ir/cache/builder/flutter/packages/flutter/test/cupertino/app_test.dart [+16799 ms] Serving tests at http://localhost:36567/static/index.html?managerUrl=ws%3A%2F%2Flocalhost%3A36567%2F36&debug=false
[ +99 ms] [CHROME]:Inconsistency detected by ld.so: dl-tls.c: 493: _dl_allocate_tls_init: Assertion `listp->slotinfo[cnt].gen <= GL(dl_tls_generation)' failed!
02:34 +354 ~3 -1: loading /b/s/w/ir/cache/builder/flutter/packages/flutter/test/cupertino/app_test.dart [E]
Failed to load "/b/s/w/ir/cache/builder/flutter/packages/flutter/test/cupertino/app_test.dart":
Unable to connect to Chrome debug port: 34483
SocketException: OS Error: Connection refused, errno = 111, address = localhost, port = 34856
package:flutter_tools/src/base/common.dart 14:3 throwToolExit
package:flutter_tools/src/web/chrome.dart 302:9 ChromiumLauncher._connect
===== asynchronous gap ===========================
dart:async/future.dart 279:46 new Future.error
package:test_core/src/runner/loader.dart 246:26 Loader.loadFile.<fn>