While compiling

     <:expr<
       let $list:field_refs$ in
       let $opt:true$ $list:[match_patt_expr]$ in
       do { iter field_sexps; $match_result$ }

I get

--
While expanding quotation "expr" in a position of "expr":
   Parse error: "module" or [opt_rec] expected after "let" (in [expr])
--

Which falls smack on "let $opt:true$".

It looks like the syntax for "'a * option" has changed. How do I fix  
this?

	Thanks, Joel

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