Add release assert for selectedIndex in WebKit::WebPopupMenu::show(). The WebCore::RenderMenuList::showPopup() derives selectedIndex from the render tree, while WebKit::WebPopupMenu::show() calls WebKit::WebPopupMenu::populateItems() which uses the DOM via WebCore::HTMLSelectElement::listItems() which may call WebCore::HTMLSelectElement::recalcListItems().
<rdar://problem/57929078>
Created attachment 385662 [details] Patch v1
Comment on attachment 385662 [details] Patch v1 Clearing flags on attachment: 385662 Committed r253523: <https://trac.webkit.org/changeset/253523>
All reviewed patches have been landed. Closing bug.