[Webkit-unassigned] [Bug 238687] New: [iOS] Several tests in media/modern-media-controls crash in -[WKActionSheetAssistant _uiMenuElementsForMediaControlContextMenuItems:]

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=238687

            Bug ID: 238687
           Summary: [iOS] Several tests in media/modern-media-controls
                    crash in -[WKActionSheetAssistant
                    _uiMenuElementsForMediaControlContextMenuItems:]
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: wenson_hsieh at apple.com

These are the ones I reproduced locally (basically the ones that present the media controls context menu):

media/modern-media-controls/overflow-support/button-state.html
media/modern-media-controls/overflow-support/chapters.html
media/modern-media-controls/overflow-support/playback-speed.html
media/modern-media-controls/tracks-support/audio-multiple-tracks.html
media/modern-media-controls/tracks-support/audio-single-track.html
media/modern-media-controls/tracks-support/auto-text-track.html
media/modern-media-controls/tracks-support/click-track-in-contextmenu.html
media/modern-media-controls/tracks-support/hidden-tracks.html
media/modern-media-controls/tracks-support/off-text-track.html

```
Thread 0 Crashed::  Dispatch queue: com.apple.main-thread
0   WebKit                                     0x151e56c8c WTF::RefPtr<WTF::StringImpl, WTF::RawPtrTraits<WTF::StringImpl>, WTF::DefaultRefDerefTraits<WTF::StringImpl> >::operator!() const + 12
1   WebKit                                     0x151ea3689 WTF::String::isEmpty() const + 25
2   WebKit                                     0x15357f693 -[WKActionSheetAssistant _uiMenuElementsForMediaControlContextMenuItems:]::$_4::operator()(WebCore::MediaControlsContextMenuItem&) const + 51
3   WebKit                                     0x15357f64d decltype(static_cast<-[WKActionSheetAssistant _uiMenuElementsForMediaControlContextMenuItems:]::$_4>(fp)(static_cast<WebCore::MediaControlsContextMenuItem&>(fp0))) std::__1::__invoke<-[WKActionSheetAssistant _uiMenuElementsForMediaControlContextMenuItems:]::$_4, WebCore::MediaControlsContextMenuItem&>(-[WKActionSheetAssistant _uiMenuElementsForMediaControlContextMenuItems:]::$_4&&, WebCore::MediaControlsContextMenuItem&) + 29
4   WebKit                                     0x15357f5c2 std::__1::invoke_result<-[WKActionSheetAssistant _uiMenuElementsForMediaControlContextMenuItems:]::$_4, WebCore::MediaControlsContextMenuItem&>::type std::__1::invoke<-[WKActionSheetAssistant _uiMenuElementsForMediaControlContextMenuItems:]::$_4, WebCore::MediaControlsContextMenuItem&>(-[WKActionSheetAssistant _uiMenuElementsForMediaControlContextMenuItems:]::$_4&&, WebCore::MediaControlsContextMenuItem&) + 50
5   WebKit                                     0x1535717be WTF::RetainPtr<NSMutableArray> WTF::createNSArray<WTF::Vector<WebCore::MediaControlsContextMenuItem, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc>&, -[WKActionSheetAssistant _uiMenuElementsForMediaControlContextMenuItems:]::$_4>(WTF::Vector<WebCore::MediaControlsContextMenuItem, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc>&, -[WKActionSheetAssistant _uiMenuElementsForMediaControlContextMenuItems:]::$_4&&) + 238
6   WebKit                                     0x153571681 -[WKActionSheetAssistant _uiMenuElementsForMediaControlContextMenuItems:] + 49
7   WebKit                                     0x153571b89 -[WKActionSheetAssistant showMediaControlsContextMenu:items:completionHandler:] + 809
8   WebKit                                     0x1549d4d15 -[WKContentView(WKInteraction) _showMediaControlsContextMenu:items:completionHandler:] + 117
```

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