[parenscript-devel] Inconsistent compilation of the empty list?

I have some test data where occasionally an empty list appears as an element inside of some other list. It's getting compiled to the JS string "[]" when what I need is the array literal [], in a way that seems inconsistent.

Specifically, these are good:

PS> (ps []) "[];"

PS> (ps '()) "[];"

PS> (ps '(1 2)) "[1, 2];"

But these are not, because they generate either the string '[]' or null as the second element, when what I need is the array literal []:

PS> (ps '(1 [])) "[1, '[]'];"

PS> (ps '(1 ())) "[1, null];"

Is this an inconsistency? Is there a workaround?

Daniel