This is with 4.2.5 on both Solaris and Linux (and I've reproduced with
4.3.2 on Linux).  Someone at Sun filed this bug; I don't know how much
y'all care.

    zsh -f < test_8

where test_8 is the attached file.  I've got a couple more such files, all
of which leave a core file with the same stack trace, FWIW.

Danek