JSONiq: cannot create mixed JDM/XDM sequence

zorba -q 'let $foo := ({"foo":1},<xml/>) return 1'

results in

Zorba error [zerr:ZXQP0002]: "false": assertion failed; raised at /home/ceej/zo/src/src/types/typemanagerimpl.cpp:943

(This isn't an issue with serialization, as the query isn't attempting to serialize a mixed sequence.)

Matthias sez:

"The assertion is triggered because STRUCTURED_ITEM_KIND is not handled in the switch in TypeManagerImpl::create_type. It's happening in the rewriter, so executing the query with --optimization-level O0 should work."

And indeed, the above query works with O0.