Fix UAF race between writers and DBImpl destruction#1296
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DengY11 wants to merge 1 commit intogoogle:mainfrom
Open
Fix UAF race between writers and DBImpl destruction#1296DengY11 wants to merge 1 commit intogoogle:mainfrom
DengY11 wants to merge 1 commit intogoogle:mainfrom
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fixes a race where writer threads can block in DBImpl::MakeRoomForWrite() and later access freed DBImpl state if delete db happens concurrently.
all tests passed.
close #1293