[N1QL] ANSI MERGE with limit not returning from rest

default bucket
standard_bucket0

if i run this query

curl http://172.23.216.252:8093/query/service -d 'statement=MERGE INTO default as d USING standard_bucket0 as s on meta(d).id == meta(s).id when matched then delete limit 10 returning *' -u Administrator:password

this curl statement never returns to me