  Rust is a popular programming language in building various low-level software
in recent years. It aims to provide safe concurrency when implementing
multi-threaded software through a suite of compiler checking rules.
Unfortunately, there is limited understanding of how the checking rules
influence the safety of concurrent programming in Rust applications.
  In this paper, we perform a preliminary study on Rust's concurrency safety
from two aspects: concurrency usage and concurrency bugs. Our study can provide
better understanding on Rust's concurrency and can guide future researchers and
practitioners in writing better, more reliable Rust software and in developing
debugging and bug detection tools for Rust.
