[google_sign_in] Flake in flexible_size_html_element_view_test.dart #176299
Description
We've been seeing a lot of flake in flutter/packages wed tests recently with this failure in google_sign_in_web (example run):
Launching integration_test/flexible_size_html_element_view_test.dart on Web Server in debug mode...
Compiling integration_test/flexible_size_html_element_view_test.dart for the Web...
29.7s
✓ Built build/web
integration_test/flexible_size_html_element_view_test.dart is being served at http://localhost:7357
The web-server device requires the Dart Debug Chrome extension for debugging. Consider using the Chrome or Edge devices for an improved development workflow.
Failure Details:
Failure in method: empty case, calls onElementCreated
══╡ EXCEPTION CAUGHT BY FLUTTER TEST FRAMEWORK ╞═════════════════
The following assertion was thrown running a test (but after the
test had completed):
Assertion failed:
org-dartlang-sdk:///lib/_engine/engine/platform_views/embedder.dart:303:27
debugInvalidViewIds == null || debugInvalidViewIds!.isEmpty
"Cannot render platform views: 0. These views have not been
created, or they have been deleted."
When the exception was thrown, this was the stack:
at module0.Error._throwWithCurrentStackTrace (http://localhost:7357/main.dart.wasm:wasm-function[737]:0x19fc6e)
at module0.AssertionError._throwWithMessage (http://localhost:7357/main.dart.wasm:wasm-function[742]:0x19fd4e)
at module0.PlatformViewEmbedder.submitFrame inner (http://localhost:7357/main.dart.wasm:wasm-function[13073]:0x275fb6)
at module0._awaitHelper closure at org-dartlang-sdk:///dart-sdk/lib/_internal/wasm/lib/async_patch.dart:104:5 (http://localhost:7357/main.dart.wasm:wasm-function[1434]:0x1ab755)
at module0.closure wrapper at org-dartlang-sdk:///dart-sdk/lib/_internal/wasm/lib/async_patch.dart:104:5 trampoline (http://localhost:7357/main.dart.wasm:wasm-function[1437]:0x1ab7d6)
at module0._rootRunUnary (http://localhost:7357/main.dart.wasm:wasm-function[1038]:0x1a415d)
at module0._rootRunUnary tear-off trampoline (http://localhost:7357/main.dart.wasm:wasm-function[6577]:0x1ff9b8)
at module0._CustomZone.runUnary (http://localhost:7357/main.dart.wasm:wasm-function[6440]:0x1fdf60)
═════════════════════════════════════════════════════════════════
I've been noticing in the _wasm variant of the web test bots, but I'm not 100% confident that it's only the wasm version failing.
This has been significantly impacting tree closure rates and presubmit flakes in flutter/packages, making it much harder to land PRs.