LibWeb: Event to update the rendering swallows all events

[shannonbooth]

The timer to render

ladybird/Userland/Services/WebContent/PageClient.cpp

Line 61 in aa1df95

m_paint_refresh_timer->start();

Seems to infinitely grow the number of tasks in the EventLoop, which for the below reproducer will mean that

ladybird/Userland/Libraries/LibWeb/HTML/TraversableNavigable.cpp

Line 943 in aa1df95

queue_global_task(Task::Source::NavigationAndTraversal, relevant_global_object(*document), JS::create_heap_function(heap(), [&] {

never ends up running.

Reverting 4a43d0a appears to resolve the problem.

Steps to reproduce:

Apply the hack patch (fixing another timeout issue) of:

diff --git a/Ladybird/Qt/WebContentView.cpp b/Ladybird/Qt/WebContentView.cpp
index 9c0cdb74ed6..bc54686d59b 100644
--- a/Ladybird/Qt/WebContentView.cpp
+++ b/Ladybird/Qt/WebContentView.cpp
@@ -681,7 +681,7 @@ void WebContentView::initialize_client(WebView::ViewImplementation::CreateNewCli

     update_screen_rects();

-    if (auto webdriver_content_ipc_path = WebView::Application::chrome_options().webdriver_content_ipc_path; webdriver_content_ipc_path.has_value())
+    if (auto webdriver_content_ipc_path = WebView::Application::chrome_options().webdriver_content_ipc_path; webdriver_content_ipc_path.has_value() && m_client_state.page_index < 2)
         client().async_connect_to_webdriver(m_client_state.page_index, *webdriver_content_ipc_path);
 }

And run ./Meta/WPT.sh run --log-mach hmm.log url/failure.html

cc @kalenikaliaksandr