Hm, doubtful.
PS1/ $ w
12:17:27 up 38 days, 17:18, 1 user, load average: 0.44, 0.11, 0.04
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
user pts/0 Narnia 07:11 0.00s 0.25s 0.11s w
PS1/ $ uname -a
Linux Rivendell 2.6.32-358.2.1.el6.x86_64 #1 SMP Wed Mar 13 00:26:49 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
PS1/ $ cat /etc/redhat\-release
CentOS release 6.4 (Final)
PS1/ $ ./a.out
2.6.37-3.x x86_64
sd@fucksheep.org 2010
a.out: sheep.c:81: main: Assertion `p = memmem(code, 1024, &needle, 8)' failed.
Abort(coredump)
PS1/
Seems it is nicely dumped instead of doing weird things in userland.
Under root is doesn't coredump, but returns to the prompt without any hassle.