[Webkit-unassigned] [Bug 196664] New: Undefined Behavior: m_experimentalImageMenuEnabled isn't initialized in HTMLImageElement when SERVICE_CONTROLS is disabled

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=196664

            Bug ID: 196664
           Summary: Undefined Behavior: m_experimentalImageMenuEnabled
                    isn't initialized in HTMLImageElement when
                    SERVICE_CONTROLS is disabled
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: chris.reid at sony.com

m_experimentalImageMenuEnabled is only initialized when SERVICE_CONTROLS is enabled but used regardless.
This doesn't seem to cause an observable bug.

SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior ..\..\Source\WebCore\dom/Document.cpp:2630:23 in 
..\..\Source\WebCore\html\HTMLImageElement.h:112:45: runtime error: load of value 190, which is not a valid value for type 'bool'
    #0 0x7ffbfe807508 in WebCore::HTMLImageElement::hasShadowControls C:\git\neko\Source\WebCore\html\HTMLImageElement.h:112
    #1 0x7ffbfe7e82c4 in WebCore::RenderImage::RenderImage C:\git\neko\Source\WebCore\rendering\RenderImage.cpp:142
    #2 0x7ffbfcdf9358 in WebCore::createRenderer<WebCore::RenderImage,WebCore::HTMLImageElement &,WebCore::RenderStyle,nullptr_t,float &> C:\git\neko\Source\WebCore\rendering\RenderPtr.h:43
    #3 0x7ffbfcde6766 in WebCore::HTMLImageElement::createElementRenderer C:\git\neko\Source\WebCore\html\HTMLImageElement.cpp:282
    #4 0x7ffc02d68bb2 in WebCore::RenderTreeUpdater::createRenderer C:\git\neko\Source\WebCore\rendering\updating\RenderTreeUpdater.cpp:363
    #5 0x7ffc02d62ad0 in WebCore::RenderTreeUpdater::updateElementRenderer C:\git\neko\Source\WebCore\rendering\updating\RenderTreeUpdater.cpp:323
    #6 0x7ffc02d60085 in WebCore::RenderTreeUpdater::updateRenderTree C:\git\neko\Source\WebCore\rendering\updating\RenderTreeUpdater.cpp:187
    #7 0x7ffc02d5df06 in WebCore::RenderTreeUpdater::commit C:\git\neko\Source\WebCore\rendering\updating\RenderTreeUpdater.cpp:119

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