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lang-bash
$patharray is tied to the$PATHscalar in csh, tcsh or zsh. The OP's code is inzshsyntax (var=(...),var+=(...)are fromzsh,sourceis fromcsh), but/etc/profileshould be in a syntax compatible with all the shells that read it, not in zsh-specific (or bash-specific, ksh-specific...) syntax.