Comment 3 for bug 2069401

Backtrace:

#0 __pthread_kill_implementation (no_tid=0, signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:44
#1 __pthread_kill_internal (signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:78
#2 __GI___pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at ./nptl/pthread_kill.c:89
#3 0x00007ffff724526e in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#4 0x00007ffff72288ff in __GI_abort () at ./stdlib/abort.c:79
#5 0x00007ffff72297b6 in __libc_message_impl (fmt=fmt@entry=0x7ffff73ce765 "*** %s ***: terminated\n") at ../sysdeps/posix/libc_fatal.c:132
#6 0x00007ffff7336c19 in __GI___fortify_fail (msg=msg@entry=0x7ffff73ce74c "buffer overflow detected") at ./debug/fortify_fail.c:24
#7 0x00007ffff73365d4 in __GI___chk_fail () at ./debug/chk_fail.c:28
#8 0x00007ffff7337db5 in ___snprintf_chk (s=s@entry=0x7fffffffbce1 " ", maxlen=maxlen@entry=1024, flag=flag@entry=2, slen=slen@entry=991, format=format@entry=0x7fffffffbb70 "%6s") at ./debug/snprintf_chk.c:29
#9 0x0000555555563714 in snprintf (__fmt=0x7fffffffbb70 "%6s", __n=1024, __s=0x7fffffffbce1 " ") at /usr/include/x86_64-linux-gnu/bits/stdio2.h:54
#10 report_close (ctl=ctl@entry=0x7fffffffcaf0) at ../ui/report.c:143
#11 0x0000555555564c4d in display_close (ctl=ctl@entry=0x7fffffffcaf0) at ../ui/display.c:127
#12 0x000055555555ca77 in main (argc=<optimized out>, argv=<optimized out>) at ../ui/mtr.c:828