Fixes a destruction race condition with the value space semaphore.
Fixes a destruction race condition with the value space semaphore.

yaolinz/rethinkdb,bchavez/rethinkdb,dparnell/rethinkdb,dparnell/rethinkdb,grandquista/rethinkdb,yakovenkodenis/rethinkdb,yakovenkodenis/rethinkdb,jmptrader/rethinkdb,mcanthony/rethinkdb,KSanthanam/rethinkdb,bchavez/rethinkdb,spblightadv/rethinkdb,yaolinz/rethinkdb,niieani/rethinkdb,mquandalle/rethinkdb,KSanthanam/rethinkdb,mbroadst/rethinkdb,losywee/rethinkdb,KSanthanam/rethinkdb,spblightadv/rethinkdb,mcanthony/rethinkdb,pap/rethinkdb,grandquista/rethinkdb,eliangidoni/rethinkdb,tempbottle/rethinkdb,victorbriz/rethinkdb,sontek/rethinkdb,robertjpayne/rethinkdb,pap/rethinkdb,catroot/rethinkdb,ayumilong/rethinkdb,JackieXie168/rethinkdb,victorbriz/rethinkdb,Qinusty/rethinkdb,Wilbeibi/rethinkdb,gavioto/rethinkdb,grandquista/rethinkdb,losywee/rethinkdb,elkingtonmcb/rethinkdb,JackieXie168/rethinkdb,bchavez/rethinkdb,JackieXie168/rethinkdb,catroot/rethinkdb,losywee/rethinkdb,sontek/rethinkdb,yaolinz/rethinkdb,lenstr/rethinkdb,dparnell/rethinkdb,dparnell/rethinkdb,niieani/rethinkdb,tempbottle/rethinkdb,victorbriz/rethinkdb,elkingtonmcb/rethinkdb,4talesa/rethinkdb,robertjpayne/rethinkdb,mquandalle/rethinkdb,ayumilong/rethinkdb,Wilbeibi/rethinkdb,4talesa/rethinkdb,lenstr/rethinkdb,Wilbeibi/rethinkdb,KSanthanam/rethinkdb,grandquista/rethinkdb,catroot/rethinkdb,pap/rethinkdb,KSanthanam/rethinkdb,RubenKelevra/rethinkdb,greyhwndz/rethinkdb,yaolinz/rethinkdb,bchavez/rethinkdb,bpradipt/rethinkdb,greyhwndz/rethinkdb,mbroadst/rethinkdb,spblightadv/rethinkdb,AntouanK/rethinkdb,AntouanK/rethinkdb,elkingtonmcb/rethinkdb,yaolinz/rethinkdb,RubenKelevra/rethinkdb,dparnell/rethinkdb,bpradipt/rethinkdb,greyhwndz/rethinkdb,mcanthony/rethinkdb,elkingtonmcb/rethinkdb,lenstr/rethinkdb,yakovenkodenis/rethinkdb,jmptrader/rethinkdb,catroot/rethinkdb,tempbottle/rethinkdb,Wilbeibi/rethinkdb,bpradipt/rethinkdb,ayumilong/rethinkdb,sontek/rethinkdb,Qinusty/rethinkdb,greyhwndz/rethinkdb,sontek/rethinkdb,victorbriz/rethinkdb,yakovenkodenis/rethinkdb,grandquista/rethinkdb,mcanthony/rethinkdb,gavioto/rethinkdb,elkingtonmcb/rethinkdb,bpradipt/rethinkdb,mquandalle/rethinkdb,mbroadst/rethinkdb,bpradipt/rethinkdb,eliangidoni/rethinkdb,bpradipt/rethinkdb,Qinusty/rethinkdb,niieani/rethinkdb,jmptrader/rethinkdb,pap/rethinkdb,tempbottle/rethinkdb,robertjpayne/rethinkdb,mbroadst/rethinkdb,victorbriz/rethinkdb,KSanthanam/rethinkdb,robertjpayne/rethinkdb,victorbriz/rethinkdb,mquandalle/rethinkdb,spblightadv/rethinkdb,grandquista/rethinkdb,dparnell/rethinkdb,Wilbeibi/rethinkdb,losywee/rethinkdb,sontek/rethinkdb,bchavez/rethinkdb,eliangidoni/rethinkdb,ajose01/rethinkdb,tempbottle/rethinkdb,ayumilong/rethinkdb,ajose01/rethinkdb,mcanthony/rethinkdb,Qinusty/rethinkdb,mcanthony/rethinkdb,mbroadst/rethinkdb,niieani/rethinkdb,niieani/rethinkdb,elkingtonmcb/rethinkdb,KSanthanam/rethinkdb,Wilbeibi/rethinkdb,greyhwndz/rethinkdb,robertjpayne/rethinkdb,ayumilong/rethinkdb,robertjpayne/rethinkdb,RubenKelevra/rethinkdb,catroot/rethinkdb,JackieXie168/rethinkdb,gavioto/rethinkdb,yaolinz/rethinkdb,jmptrader/rethinkdb,eliangidoni/rethinkdb,bchavez/rethinkdb,4talesa/rethinkdb,ajose01/rethinkdb,AntouanK/rethinkdb,bpradipt/rethinkdb,niieani/rethinkdb,greyhwndz/rethinkdb,bpradipt/rethinkdb,gavioto/rethinkdb,RubenKelevra/rethinkdb,bchavez/rethinkdb,JackieXie168/rethinkdb,Qinusty/rethinkdb,mquandalle/rethinkdb,lenstr/rethinkdb,4talesa/rethinkdb,robertjpayne/rethinkdb,mbroadst/rethinkdb,mquandalle/rethinkdb,RubenKelevra/rethinkdb,jmptrader/rethinkdb,sontek/rethinkdb,victorbriz/rethinkdb,4talesa/rethinkdb,RubenKelevra/rethinkdb,catroot/rethinkdb,JackieXie168/rethinkdb,gavioto/rethinkdb,ajose01/rethinkdb,robertjpayne/rethinkdb,pap/rethinkdb,pap/rethinkdb,bchavez/rethinkdb,yakovenkodenis/rethinkdb,jmptrader/rethinkdb,greyhwndz/rethinkdb,lenstr/rethinkdb,gavioto/rethinkdb,losywee/rethinkdb,elkingtonmcb/rethinkdb,JackieXie168/rethinkdb,RubenKelevra/rethinkdb,tempbottle/rethinkdb,yaolinz/rethinkdb,niieani/rethinkdb,greyhwndz/rethinkdb,4talesa/rethinkdb,mcanthony/rethinkdb,ajose01/rethinkdb,catroot/rethinkdb,losywee/rethinkdb,Qinusty/rethinkdb,tempbottle/rethinkdb,yakovenkodenis/rethinkdb,ajose01/rethinkdb,bchavez/rethinkdb,4talesa/rethinkdb,grandquista/rethinkdb,mcanthony/rethinkdb,JackieXie168/rethinkdb,mbroadst/rethinkdb,mbroadst/rethinkdb,elkingtonmcb/rethinkdb,4talesa/rethinkdb,AntouanK/rethinkdb,eliangidoni/rethinkdb,ayumilong/rethinkdb,spblightadv/rethinkdb,jmptrader/rethinkdb,JackieXie168/rethinkdb,spblightadv/rethinkdb,AntouanK/rethinkdb,Qinusty/rethinkdb,robertjpayne/rethinkdb,mquandalle/rethinkdb,Qinusty/rethinkdb,ajose01/rethinkdb,bpradipt/rethinkdb,eliangidoni/rethinkdb,dparnell/rethinkdb,yaolinz/rethinkdb,eliangidoni/rethinkdb,pap/rethinkdb,sontek/rethinkdb,RubenKelevra/rethinkdb,spblightadv/rethinkdb,lenstr/rethinkdb,yakovenkodenis/rethinkdb,grandquista/rethinkdb,ayumilong/rethinkdb,Wilbeibi/rethinkdb,victorbriz/rethinkdb,ayumilong/rethinkdb,dparnell/rethinkdb,KSanthanam/rethinkdb,mquandalle/rethinkdb,spblightadv/rethinkdb,eliangidoni/rethinkdb,AntouanK/rethinkdb,pap/rethinkdb,l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