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为什么在Option :: unwrap()中创建Reqwest客户端恐慌?
extern crate reqwest; fn main() { let client = reqwest::Client::new(); } 当我运行这个时,我得到了这个错误 . thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', libcore/option.rs:345:21 我也尝...