_rewrite handler loops cause cpu load and swap of death

when creating a simple _rewrite loop, the db will start to eat cpu and take more & more memory

for testing i created:

{"_id":"_design/loopa","rewrites":[

{"from":"","to":"../loopb/_rewrite"}

]}
{"_id":"_design/loopb","rewrites":[

{"from":"","to":"../loopa/_rewrite"}

]}

accessing $dburi/_design/loopa/_rewrite/ will start the loop