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Thanks guys.. Mystery solved! I ran it through ksh and dash before but I must have been looking at the wrong thing .... It is a bash-only thing then. I never realized default bash is so much...

According to the POSIX specifications eval is a special shell built-in (http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_14), which should imply that variable...