[Bug 283934] The jail.conf(5) parser crashes when expanding a multi-valued variable inside an other variable.

[bugzilla-noreply]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=283934

--- Comment #1 from cr...@rlwinm.de ---
The parser does not crash if the expansion contains any string literals e.g.
these report **non**-fatal warnings and expand $x to empty string:

        $y += ",$x";
        $z += "$x,";

while this crashes during variable expansion:

        $y += "$x";

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