[Webkit-unassigned] [Bug 247089] New: [GTK] UI process crash when opening video settings

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=247089

            Bug ID: 247089
           Summary: [GTK] UI process crash when opening video settings
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mcatanzaro at gnome.org
                CC: bugs-noreply at webkitgtk.org

Moving this from https://gitlab.gnome.org/GNOME/epiphany/-/issues/1891. When clicking the settings cog at the bottom-right corner of an HTML video element, the Epiphany UI process crashes because the WebKitWebView::context-menu signal is emitted with a NULL event parameter, which is illegal as that parameter is not documented to be nullable. Our documentation says:

"The event is expected to be one of the following types: a GdkEventButton of type GDK_BUTTON_PRESS when the context menu was triggered with mouse. a GdkEventKey of type GDK_KEY_PRESS if the keyboard was used to show the menu. a generic GdkEvent of type GDK_NOTHING when the GtkWidget::popup-menu signal was used to show the context menu."

WebKitWebViewBase is not prepared to handle the case where the context menu is opened by a Messages::WebPageProxy::ShowContextMenu message sent by the web process.

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