311741 2026-04-08 11:00:54 -0700 Nesting requestClose() shouldn't fire multiple cancel events 2026-04-08 11:05:36 -0700 1 1 1 Unclassified WebKit DOM WebKit Local Build Unspecified Unspecified NEW https://github.com/web-platform-tests/wpt/pull/59053 P2 Normal --- 1 lwarlow lwarlow oldest_to_newest 2198031 0 lwarlow 2026-04-08 11:00:54 -0700 ```html <dialog id="dialog">Some Dialog Content</dialog> <script> dialog.showModal(); dialog.oncancel = () => { dialog.requestClose(); }; dialog.requestClose(); </script> ``` This leads to a RangeError: Maximum call stack size exceeded. in WebKIt. The spec prevents this through CloseWatcher machinery, we should add a guard to prevent this until CloseWatchers are finished and integrated with dialog. 2198032 1 lwarlow 2026-04-08 11:04:22 -0700 Pull request: https://github.com/WebKit/WebKit/pull/62283