qingstor: fix go routine leak on multipart upload errors - fixes #2851
qingstor: fix go routine leak on multipart upload errors - fixes #2851

B4dM4n/rclone,ncw/rclone,ncw/rclone,olihey/rclone,olihey/rclone,olihey/rclone,ncw/rclone,B4dM4n/rclone,ncw/rclone,B4dM4n/rclone,olihey/rclone,B4dM4n/rclone