StacktraceTop: _int_free (av=0x7f64c9e9d1c0, p=0x230fce0) at malloc.c:4892 __GI___libc_free (mem=<optimized out>) at malloc.c:3738 gdk_window_clear_backing_region (window=<optimized out>, region=0x2313270) at /build/buildd/gtk+3.0-3.1.92/./gdk/gdkwindow.c:3467 gdk_window_begin_paint_region (region=<optimized out>, window=0x2237240) at /build/buildd/gtk+3.0-3.1.92/./gdk/gdkwindow.c:2907 gdk_window_begin_paint_region (window=0x2237240, region=<optimized out>) at /build/buildd/gtk+3.0-3.1.92/./gdk/gdkwindow.c:2833
StacktraceTop: clear_backing_ region (window=<optimized out>, region=0x2313270) at /build/ buildd/ gtk+3.0- 3.1.92/ ./gdk/gdkwindow .c:3467 begin_paint_ region (region=<optimized out>, window=0x2237240) at /build/ buildd/ gtk+3.0- 3.1.92/ ./gdk/gdkwindow .c:2907 begin_paint_ region (window=0x2237240, region=<optimized out>) at /build/ buildd/ gtk+3.0- 3.1.92/ ./gdk/gdkwindow .c:2833
_int_free (av=0x7f64c9e9d1c0, p=0x230fce0) at malloc.c:4892
__GI___libc_free (mem=<optimized out>) at malloc.c:3738
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gdk_window_
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