zsh 5.0.3 was just released. Is it possible for you to re-confirm the
bug with that version? If not, or if the problem is still present in
5.0.3, please send a stack trace from the crash you experienced.
I recompiled both zsh 5.0.2 and 5.0.3 myself, using gcc (the package
from perzl.org was compiled with the native AIX compiler). Both
self-compiled versions work fine, so it seams to be an issue with
the package from perzl.org. I'll see if I can address this with
Michael Perzl.
There's one small issue with 5.0.3. It prints the following message:
# /tmp/zsh/bin/zsh -f
he-aix-main-61# autoload -Uz compinit
he-aix-main-61# compinit
compaudit:zstat:102: /proc/8781864/exe: a file or directory in the
path name does not exist.