fix(core,s3): duplicate file handle for multithreaded code also for optimized path (#272)
fix(core,s3): duplicate file handle for multithreaded code also for optimized path (#272)


maartenbreddels/vaex,maartenbreddels/vaex,maartenbreddels/vaex,maartenbreddels/vaex,maartenbreddels/vaex,maartenbreddels/vaex