[GTK] Crash in WebKit::supportsXDamageAndXComposite

• Component: WebKitGTK
• Status: NEW ---

[Michael Catanzaro]

Created attachment 255638 [details]
full backtrace

I'm not really sure what to make of this crash report, whether it's a WebKit issue or an X11 issue:

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 XQueryExtension at QuExt.c:43
 #1 XInitExtension at InitExt.c:47
 #2 XDamageExtAddDisplay at Xdamage.c:58
 #3 XDamageFindDisplay at Xdamage.c:202
 #4 XDamageQueryExtension at Xdamage.c:288
 #5 WebKit::supportsXDamageAndXComposite at /usr/src/debug/webkitgtk-2.9.3/Source/WebKit2/UIProcess/gtk/RedirectedXCompositeWindow.cpp:115
 #6 WebKit::RedirectedXCompositeWindow::create(_GdkWindow*, std::function<void ()>) at /usr/src/debug/webkitgtk-2.9.3/Source/WebKit2/UIProcess/gtk/RedirectedXCompositeWindow.cpp:135
 #7 webkitWebViewBaseRealize at /usr/src/debug/webkitgtk-2.9.3/Source/WebKit2/UIProcess/API/gtk/WebKitWebViewBase.cpp:332
 #12 gtk_widget_realize at gtkwidget.c:5551
 #13 gtk_widget_map at gtkwidget.c:5066

QuExt.c is pretty simple [1]; looks like we may have passed an invalid display (dpy=dpy@entry=0x55c3119500b0).

[1] http://cgit.freedesktop.org/xorg/lib/libX11/tree/src/QuExt.c

[Martin Robinson]

Hrm. We are just calling gdk_window_get_display on the GdkWindow returned from gtk_widget_get_parent_window in the realize method of the widget.