StacktraceTop:
gtk_style_context_get_valist (context=0x2e98200, state=GTK_STATE_FLAG_NORMAL, args=0x7ffffcab37b8) at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkstylecontext.c:1529
gtk_style_context_get (context=0x2e98200, state=GTK_STATE_FLAG_NORMAL) at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkstylecontext.c:1564
gtk_style_context_set_background (context=0x2e98200, window=0x2e92360) at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkstylecontext.c:3474
gtk_widget_real_style_updated (widget=0x1fe7790) at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkwidget.c:6579
gtk_window_style_updated (widget=0x1fe7790) at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkwindow.c:5730
StacktraceTop: context_ get_valist (context=0x2e98200, state=GTK_ STATE_FLAG_ NORMAL, args=0x7ffffcab 37b8) at /build/ buildd/ gtk+3.0- 3.3.16/ ./gtk/gtkstylec ontext. c:1529 context_ get (context=0x2e98200, state=GTK_ STATE_FLAG_ NORMAL) at /build/ buildd/ gtk+3.0- 3.3.16/ ./gtk/gtkstylec ontext. c:1564 context_ set_background (context=0x2e98200, window=0x2e92360) at /build/ buildd/ gtk+3.0- 3.3.16/ ./gtk/gtkstylec ontext. c:3474 real_style_ updated (widget=0x1fe7790) at /build/ buildd/ gtk+3.0- 3.3.16/ ./gtk/gtkwidget .c:6579 style_updated (widget=0x1fe7790) at /build/ buildd/ gtk+3.0- 3.3.16/ ./gtk/gtkwindow .c:5730
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