compare_digest fix (for #5916)
compare_digest fix (for #5916)

robertjpayne/rethinkdb,mbroadst/rethinkdb,robertjpayne/rethinkdb,mbroadst/rethinkdb,mbroadst/rethinkdb,grandquista/rethinkdb,JackieXie168/rethinkdb,bpradipt/rethinkdb,bpradipt/rethinkdb,grandquista/rethinkdb,grandquista/rethinkdb,JackieXie168/rethinkdb,robertjpayne/rethinkdb,JackieXie168/rethinkdb,bpradipt/rethinkdb,robertjpayne/rethinkdb,grandquista/rethinkdb,jmptrader/rethinkdb,grandquista/rethinkdb,grandquista/rethinkdb,jmptrader/rethinkdb,grandquista/rethinkdb,mbroadst/rethinkdb,JackieXie168/rethinkdb,bpradipt/rethinkdb,JackieXie168/rethinkdb,JackieXie168/rethinkdb,bpradipt/rethinkdb,grandquista/rethinkdb,jmptrader/rethinkdb,mbroadst/rethinkdb,robertjpayne/rethinkdb,jmptrader/rethinkdb,robertjpayne/rethinkdb,JackieXie168/rethinkdb,mbroadst/rethinkdb,mbroadst/rethinkdb,jmptrader/rethinkdb,JackieXie168/rethinkdb,bpradipt/rethinkdb,grandquista/rethinkdb,mbroadst/rethinkdb,bpradipt/rethinkdb,robertjpayne/rethinkdb,robertjpayne/rethinkdb,robertjpayne/rethinkdb,jmptrader/rethinkdb,mbroadst/rethinkdb,jmptrader/rethinkdb,JackieXie168/rethinkdb,bpradipt/rethinkdb,jmptrader/rethinkdb,bpradipt/rethinkdb