error.log

error[E0277]: the trait bound `errors::Error: storage::_IMPL_DESERIALIZE_FOR_User::_serde::export::From<std::sync::PoisonError<std::sync::MutexGuard<'_, rocksdb::DB>>>` is not satisfied
  --> src/storage.rs:28:15
   |
28 |         match self.db.lock()?.get(format!("user:{}", username).as_bytes()) {
   |               ^^^^^^^^^^^^^^^ the trait `storage::_IMPL_DESERIALIZE_FOR_User::_serde::export::From<std::sync::PoisonError<std::sync::MutexGuard<'_, rocksdb::DB>>>` is not implemented for `errors::Error`
   |
   = help: the following implementations were found:
             <errors::Error as storage::_IMPL_DESERIALIZE_FOR_User::_serde::export::From<std::num::ParseIntError>>
             <errors::Error as storage::_IMPL_DESERIALIZE_FOR_User::_serde::export::From<std::io::Error>>
             <errors::Error as storage::_IMPL_DESERIALIZE_FOR_User::_serde::export::From<chrono::ParseError>>
             <errors::Error as storage::_IMPL_DESERIALIZE_FOR_User::_serde::export::From<rocksdb::Error>>
           and 4 others
   = note: required by `storage::_IMPL_DESERIALIZE_FOR_User::_serde::export::From::from`

error[E0277]: the trait bound `errors::Error: storage::_IMPL_DESERIALIZE_FOR_User::_serde::export::From<std::sync::PoisonError<std::sync::MutexGuard<'_, rocksdb::DB>>>` is not satisfied
  --> src/storage.rs:44:33
   |
44 |             Err(err) => Err(err.into())
   |                                 ^^^^ the trait `storage::_IMPL_DESERIALIZE_FOR_User::_serde::export::From<std::sync::PoisonError<std::sync::MutexGuard<'_, rocksdb::DB>>>` is not implemented for `errors::Error`
   |
   = help: the following implementations were found:
             <errors::Error as storage::_IMPL_DESERIALIZE_FOR_User::_serde::export::From<std::num::ParseIntError>>
             <errors::Error as storage::_IMPL_DESERIALIZE_FOR_User::_serde::export::From<std::io::Error>>
             <errors::Error as storage::_IMPL_DESERIALIZE_FOR_User::_serde::export::From<chrono::ParseError>>
             <errors::Error as storage::_IMPL_DESERIALIZE_FOR_User::_serde::export::From<rocksdb::Error>>
           and 4 others
   = note: required because of the requirements on the impl of `storage::_IMPL_DESERIALIZE_FOR_User::_serde::export::Into<errors::Error>` for `std::sync::PoisonError<std::sync::MutexGuard<'_, rocksdb::DB>>`

error: aborting due to 2 previous errors

error: Could not compile `quotevote`.

To learn more, run the command again with --verbose.

Process finished with exit code 101

storage.rs

use errors::*;
use rocksdb::DB;
use rocksdb::Options;
use std::path::Path;
use serde_json::{from_str, to_string};
use std::sync::Mutex;

#[derive(Serialize, Deserialize, Debug)]
pub struct User {
    username: String,
    password: String
}

pub struct Storage {
    db: Mutex<DB>
}

impl Storage {
    pub fn new(path: &Path) -> Result<Storage> {
        let mut options = Options::default();
        options.create_if_missing(true);
        let db = DB::open(&options, path)?;

        Ok(Storage { db: Mutex::new(db) })
    }

    pub fn find_user<'a>(&self, username: &'a str) -> Result<Option<User>> {
        match self.db.lock()?.get(format!("user:{}", username).as_bytes()) {
            Ok(Some(result)) => match result.to_utf8() {
                Some(userdata) => Ok(Some(from_str(userdata)?)),
                None => Ok(None)
            },
            Ok(None) => Ok(None),
            Err(err) => Err(err.into())
        }
    }

    pub fn store_user(&mut self, user: &User) -> Result<()> {
        match self.db.lock() {
            Ok(db) => Ok(db.put(
                format!("user:{}", user.username).as_bytes(),
                to_string(user)?.as_bytes()
            )?),
            Err(err) => Err(err.into())
        }

    }
}