Comment 2 for bug 738693

StacktraceTop:
 raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
 abort () at abort.c:121
 g_assertion_message (domain=<value optimized out>, file=<value optimized out>, line=<value optimized out>, func=0x7f5ec54cca75 "miUnionNonO", message=0x7f5e9c9b90a0 "assertion failed: (y1 < y2)") at /build/buildd/glib2.0-2.28.3/./glib/gtestutils.c:1358
 g_assertion_message_expr (domain=0x7f5ec54c7913 "Gdk", file=0x7f5ec54cc8b0 "/build/buildd/gtk+2.0-2.24.3/gdk/gdkregion-generic.c", line=1110, func=0x7f5ec54cca75 "miUnionNonO", expr=<value optimized out>) at /build/buildd/glib2.0-2.28.3/./glib/gtestutils.c:1369
 miUnionNonO (pReg=0x7f5ec1e6ce00, r=0x7f5ec1e865b0, rEnd=0x7f5ec1e865c0, y1=32606, y2=32606) at /build/buildd/gtk+2.0-2.24.3/gdk/gdkregion-generic.c:1110