cargo new，则这些 git 相关文件则不会生成；可以通过运行 cargo new --vcs=git 来覆盖这些行为。 注意：git 是一个常用的版本控制系统（version control system，VCS）。可以通过 --vcs 参数使 cargo new 切换到其它版本控制系统（VCS），或者不使用 VCS。运行 cargo new --help 查看可用的选项。 请自行选用文本编辑器打开 I call it my billion-dollar mistake. At that time, I was designing the first comprehensive type system for references in an object-oriented language. My goal was to ensure that all use of references should simply because it was so easy to implement. This has led to innumerable errors, vulnerabilities, and system crashes, which have probably caused a billion dollars of pain and damage in the last forty years