let result = crypt(password.as_bytes(), &user_pwd.pw_passwd.as_bytes())?; 

error[E0277]: the size for values of type `dyn std::error::Error` cannot be known at compilation time
   --> src/bin/passwd.rs:413:76
    |
413 |     let result = crypt(password.as_bytes(), &user_pwd.pw_passwd.as_bytes())?;
    |                                                                            ^ doesn't have a size known at compile-time
    |
    = help: the trait `Sized` is not implemented for `dyn std::error::Error`
    = help: the following other types implement trait `FromResidual<R>`:
              <Result<T, F> as FromResidual<Yeet<E>>>
              <Result<T, F> as FromResidual<Result<Infallible, E>>>
    = note: required for `Box<dyn std::error::Error>` to implement `std::error::Error`
    = note: required for `anyhow::Error` to implement `From<Box<dyn std::error::Error>>`
    = note: required for `Result<(), anyhow::Error>` to implement `FromResidual<Result<Infallible, Box<dyn std::error::Error>>>`

error[E0277]: `dyn std::error::Error` cannot be sent between threads safely
   --> src/bin/passwd.rs:413:76
    |
413 |     let result = crypt(password.as_bytes(), &user_pwd.pw_passwd.as_bytes())?;
    |                                                                            ^ `dyn std::error::Error` cannot be sent between threads safely
    |
    = help: the trait `Send` is not implemented for `dyn std::error::Error`
    = help: the following other types implement trait `FromResidual<R>`:
              <Result<T, F> as FromResidual<Yeet<E>>>
              <Result<T, F> as FromResidual<Result<Infallible, E>>>
    = note: required for `Unique<dyn std::error::Error>` to implement `Send`
note: required because it appears within the type `Box<dyn Error>`
   --> /home/amiculas/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/alloc/src/boxed.rs:195:12
    |
195 | pub struct Box<
    |            ^^^
    = note: required for `anyhow::Error` to implement `From<Box<dyn std::error::Error>>`
    = note: required for `Result<(), anyhow::Error>` to implement `FromResidual<Result<Infallible, Box<dyn std::error::Error>>>`

error[E0277]: `dyn std::error::Error` cannot be shared between threads safely
   --> src/bin/passwd.rs:413:76
    |
413 |     let result = crypt(password.as_bytes(), &user_pwd.pw_passwd.as_bytes())?;
    |                                                                            ^ `dyn std::error::Error` cannot be shared between threads safely
    |
    = help: the trait `Sync` is not implemented for `dyn std::error::Error`
    = help: the following other types implement trait `FromResidual<R>`:
              <Result<T, F> as FromResidual<Yeet<E>>>
              <Result<T, F> as FromResidual<Result<Infallible, E>>>
    = note: required for `Unique<dyn std::error::Error>` to implement `Sync`
note: required because it appears within the type `Box<dyn Error>`
   --> /home/amiculas/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/alloc/src/boxed.rs:195:12
    |
195 | pub struct Box<
    |            ^^^
    = note: required for `anyhow::Error` to implement `From<Box<dyn std::error::Error>>`
    = note: required for `Result<(), anyhow::Error>` to implement `FromResidual<Result<Infallible, Box<dyn std::error::Error>>>`