Intermittent CRASH in `/html/semantics/embedded-content/media-elements/track/track-element/track-remove-by-setting-innerHTML.html`

https://github.com/servo/servo/runs/41442587618
first run that had it on main: https://github.com/servo/servo/runs/41339409576