Rust error[E0716]：临时值提前释放问题求解（已尝试let绑定）

我之前查过Rust官方的E0716错误码文档，里面的问题和解答很有用，但我的情况不一样，所以来提问。

我要读取Ubuntu Linux 22.10系统ext4文件系统的目录条目，写了下面这段代码——我知道它不够符合Rust风格，但本来觉得能满足需求：

let mut all_chosenfiles: Vec<&str> = Vec::new();
for next_path in path_components {
    for next_dir_entry in fs::read_dir(next_path) {
        for next_file in next_dir_entry {
            let file_metadata = next_file.as_ref().unwrap().metadata().unwrap();
            if file_metadata.is_file()
                && file_metadata.mode() & 0o500 == 0o500 {
                    let chosen_file = next_file.unwrap().path();
                    all_chosenfiles.push(chosen_file.to_owned().to_str().unwrap());
            }

        }
    }
}

结果编译器报错了：

error[E0716]: temporary value dropped while borrowed
  --> src/main.rs:31:46
   |
31 |                         all_chosenfiles.push(chosen_file.to_owned().to_str().unwrap());
   |                         ---------------------^^^^^^^^^^^^^^^^^^^^^^-------------------- temporary value is freed at the end of this statement
   |                         |                    |
   |                         |                    creates a temporary which is freed while still in use
   |                         borrow later used here
   |
   = note: consider using a `let` binding to create a longer lived value

我明白报错的原因，也试着按照文档建议用let绑定来解决，修改后的代码是这样：

for next_path in path_components {
    for next_dir_entry in fs::read_dir(next_path) {
        for next_file in next_dir_entry {
            let file_metadata = next_file.as_ref().unwrap().metadata().unwrap();
            if file_metadata.is_file()
                && file_metadata.mode() & 0o500 == 0o500 {
                    let chosen_path = next_file.unwrap().path();
                    let chosen_file = &chosen_path.to_owned().to_str().unwrap();
                    all_chosenfiles.push(chosen_file);
            }

        }
    }
}

但编译器还是报错：

error[E0716]: temporary value dropped while borrowed
  --> src/main.rs:31:44
   |
31 |                         let chosen_file = &chosen_path.to_owned().to_str().unwrap();
   |                                            ^^^^^^^^^^^^^^^^^^^^^^                  - temporary value is freed at the end of this statement
   |                                            |
   |                                            creates a temporary which is freed while still in use
32 |                         all_chosenfiles.push(chosen_file);
   |                                              ----------- borrow later used here
   |
   = note: consider using a `let` binding to create a longer lived value

我实在搞不懂，肯定是漏了某种Rust的惯用写法。难道只能用*运算符解引用（也就是*chosen_file）来解决吗？

内容的提问来源于stack exchange，提问作者Nirmalya