atop crashed with SIGFPE in __libc_start_main()

I was not interacting with atop when this crash happened.

ProblemType: Crash
DistroRelease: Ubuntu 15.10
Package: atop 1.26-2
ProcVersionSignature: Ubuntu 4.2.0-7.7-generic 4.2.0
Uname: Linux 4.2.0-7-generic x86_64
ApportVersion: 2.18.1-0ubuntu1
Architecture: amd64
Date: Fri Sep 25 00:00:01 2015
ExecutablePath: /usr/bin/atop
ProcCmdline: /usr/bin/atop -a -w /var/log/atop/atop_20150925 600
ProcEnviron:
 SHELL=/bin/sh
 PATH=(custom, no user)
 LC_COLLATE=C
 LANG=en_US.UTF-8
 LANGUAGE=en_US:us
Signal: 8
SourcePackage: atop
StacktraceTop:
 ?? ()
 ?? ()
 __libc_start_main (main=0x402c70, argc=5, argv=0x7fffffffecd8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffecc8) at libc-start.c:289
 ?? ()
Title: atop crashed with SIGFPE in __libc_start_main()
UpgradeStatus: Upgraded to wily on 2015-09-06 (18 days ago)
UserGroups: pkcs11