[INFO] cloning repository https://github.com/MishaChavarha/SimpleRustDB
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MishaChavarha/SimpleRustDB" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMishaChavarha%2FSimpleRustDB", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMishaChavarha%2FSimpleRustDB'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7b3884573a096579a975d1a4be3f3d77784ff935
[INFO] testing MishaChavarha/SimpleRustDB against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMishaChavarha%2FSimpleRustDB" "/workspace/builds/worker-58/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-58/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MishaChavarha/SimpleRustDB on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MishaChavarha/SimpleRustDB
[INFO] finished tweaking git repo https://github.com/MishaChavarha/SimpleRustDB
[INFO] tweaked toml for git repo https://github.com/MishaChavarha/SimpleRustDB written to /workspace/builds/worker-58/source/Cargo.toml
[INFO] crate git repo https://github.com/MishaChavarha/SimpleRustDB already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded random-access-disk v2.0.0
[INFO] [stderr]   Downloaded random-access-storage v4.0.0
[INFO] [stderr]   Downloaded mkdirp v1.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dbd43ed819210403a01c3605c9deaae7a2fbdb614f1e2774116e41e76d1d6b8c
[INFO] running `Command { std: "docker" "start" "-a" "dbd43ed819210403a01c3605c9deaae7a2fbdb614f1e2774116e41e76d1d6b8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dbd43ed819210403a01c3605c9deaae7a2fbdb614f1e2774116e41e76d1d6b8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbd43ed819210403a01c3605c9deaae7a2fbdb614f1e2774116e41e76d1d6b8c", kill_on_drop: false }`
[INFO] [stdout] dbd43ed819210403a01c3605c9deaae7a2fbdb614f1e2774116e41e76d1d6b8c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c134fdd6c61fd8a4735ff2d76e8c93df4f93be4de9d3d1aeae2787de8490f27
[INFO] running `Command { std: "docker" "start" "-a" "2c134fdd6c61fd8a4735ff2d76e8c93df4f93be4de9d3d1aeae2787de8490f27", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling futures-core v0.3.8
[INFO] [stderr]    Compiling futures-io v0.3.8
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling once_cell v1.5.2
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling cache-padded v1.1.1
[INFO] [stderr]    Compiling pin-project-lite v0.1.11
[INFO] [stderr]    Compiling waker-fn v1.1.0
[INFO] [stderr]    Compiling parking v2.0.0
[INFO] [stderr]    Compiling fastrand v1.4.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling event-listener v2.5.1
[INFO] [stderr]    Compiling const_fn v0.4.3
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]    Compiling vec-arena v1.0.0
[INFO] [stderr]    Compiling async-task v4.0.3
[INFO] [stderr]    Compiling futures-sink v0.3.8
[INFO] [stderr]    Compiling atomic-waker v1.0.0
[INFO] [stderr]    Compiling anyhow v1.0.34
[INFO] [stderr]    Compiling mkdirp v1.0.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.0
[INFO] [stderr]    Compiling concurrent-queue v1.2.2
[INFO] [stderr]    Compiling futures-channel v0.3.8
[INFO] [stderr]    Compiling async-mutex v1.4.0
[INFO] [stderr]    Compiling futures-task v0.3.8
[INFO] [stderr]    Compiling futures-lite v1.11.2
[INFO] [stderr]    Compiling async-channel v1.5.1
[INFO] [stderr]    Compiling kv-log-macro v1.0.7
[INFO] [stderr]    Compiling nb-connect v1.0.2
[INFO] [stderr]    Compiling polling v2.0.2
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling positioned-io-preview v0.3.3
[INFO] [stderr]    Compiling async-executor v1.4.0
[INFO] [stderr]    Compiling blocking v1.0.2
[INFO] [stderr]    Compiling async-io v1.2.0
[INFO] [stderr]    Compiling async-global-executor v1.4.3
[INFO] [stderr]    Compiling async-std v1.7.0
[INFO] [stderr]    Compiling pin-project-internal v1.0.2
[INFO] [stderr]    Compiling futures-macro v0.3.8
[INFO] [stderr]    Compiling async-trait v0.1.41
[INFO] [stderr]    Compiling random-access-storage v4.0.0
[INFO] [stderr]    Compiling random-access-disk v2.0.0
[INFO] [stderr]    Compiling pin-project v1.0.2
[INFO] [stderr]    Compiling futures-util v0.3.8
[INFO] [stderr]    Compiling futures-executor v0.3.8
[INFO] [stderr]    Compiling futures v0.3.8
[INFO] [stderr]    Compiling simple_rust_db v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `fs::OpenOptions`
[INFO] [stdout]  --> src/application/file_manager.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::{fs::OpenOptions, io::Result};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/application/file_manager.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]   --> src/application/file_manager.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::path::PathBuf;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]   --> src/application/file_manager.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::collections::HashMap;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]   --> src/application/file_manager.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::fs;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]   --> src/application/file_manager.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::path::Path;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `random_access_disk::RandomAccessDisk`
[INFO] [stdout]   --> src/application/file_manager.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use random_access_disk::RandomAccessDisk;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::WORK_DIR`
[INFO] [stdout]   --> src/application/file_manager.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | use super::WORK_DIR;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arc`, `Mutex`
[INFO] [stdout]  --> src/application/log_manager.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::sync::{Arc, Mutex};
[INFO] [stdout]   |                 ^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Result`
[INFO] [stdout]  --> src/application/log_manager.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `FileManager`, `block::Block`, `page::Page`
[INFO] [stdout]  --> src/application/log_manager.rs:4:27
[INFO] [stdout]   |
[INFO] [stdout] 4 | use super::file_manager::{block::Block, FileManager, page::Page};
[INFO] [stdout]   |                           ^^^^^^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arc`, `Mutex`, `io::*`
[INFO] [stdout]  --> src/application.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{io::*, sync::{Arc, Mutex}};
[INFO] [stdout]   |           ^^^^^         ^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `file_manager::FileManager`, `log_manager::LogManager`
[INFO] [stdout]  --> src/application.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | use self::{file_manager::FileManager, log_manager::LogManager};
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]   --> src/application/file_manager.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::io::*;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `raf`
[INFO] [stdout]    --> src/application/file_manager/storage.rs:103:13
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let raf = self.storage.get(file).unwrap();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_raf`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `raf`
[INFO] [stdout]    --> src/application/file_manager/storage.rs:126:13
[INFO] [stdout]     |
[INFO] [stdout] 126 |         let raf = self.storage.get(file).unwrap();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_raf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/application/file_manager.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn length(&self, file:&str) -> Result<u64> {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] 72 | 
[INFO] [stdout] 73 |         self.length(file)
[INFO] [stdout]    |         ----------------- recursive call site
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/application/file_manager/page.rs:12:16
[INFO] [stdout]    |
[INFO] [stdout] 12 |         pub fn new(buffer_size: u64) -> Page{
[INFO] [stdout]    |                ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `buffer`
[INFO] [stdout]   --> src/application/file_manager/page.rs:20:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |         pub fn buffer(&mut self) -> &mut [u8]{
[INFO] [stdout]    |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write_int`
[INFO] [stdout]   --> src/application/file_manager/page.rs:26:16
[INFO] [stdout]    |
[INFO] [stdout] 26 |         pub fn write_int(&mut self, offset: u64, data: i32) -> Result<()>{
[INFO] [stdout]    |                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_int`
[INFO] [stdout]   --> src/application/file_manager/page.rs:33:16
[INFO] [stdout]    |
[INFO] [stdout] 33 |         pub fn read_int(&mut self, offset: u64) -> Result<i32> {
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write_bytes`
[INFO] [stdout]   --> src/application/file_manager/page.rs:40:16
[INFO] [stdout]    |
[INFO] [stdout] 40 |         pub fn write_bytes(&mut self, offset: u64, data: &[u8]) -> Result<()>{
[INFO] [stdout]    |                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_bytes`
[INFO] [stdout]   --> src/application/file_manager/page.rs:50:16
[INFO] [stdout]    |
[INFO] [stdout] 50 |         pub fn read_bytes(&mut self, offset: u64) -> Result<&[u8]>{
[INFO] [stdout]    |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/application/file_manager/block.rs:9:16
[INFO] [stdout]   |
[INFO] [stdout] 9 |         pub fn new(file: &str, id: u64) -> Block {
[INFO] [stdout]   |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `id`
[INFO] [stdout]   --> src/application/file_manager/block.rs:16:16
[INFO] [stdout]    |
[INFO] [stdout] 16 |         pub fn id(&self) -> u64{
[INFO] [stdout]    |                ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `file`
[INFO] [stdout]   --> src/application/file_manager/block.rs:20:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |         pub fn file(&self) -> &str{
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `length`
[INFO] [stdout]   --> src/application/file_manager/storage.rs:90:20
[INFO] [stdout]    |
[INFO] [stdout] 90 |     pub (super) fn length(&mut self,file:&str) -> Result<u64>{
[INFO] [stdout]    |                    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `WORK_DIR`
[INFO] [stdout]   --> src/application.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | static WORK_DIR: &str = "Database";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `BLOCK_SIZE`
[INFO] [stdout]   --> src/application.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | static BLOCK_SIZE: u64 = 500; // bytes 
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Application`
[INFO] [stdout]   --> src/application.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Application {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/application/file_manager/storage.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |         raf.read_at(offset*self.block_size, buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/application/file_manager/storage.rs:83:9
[INFO] [stdout]    |
[INFO] [stdout] 83 |         raf.write_at(offset*self.block_size, buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 32 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.47s
[INFO] running `Command { std: "docker" "inspect" "2c134fdd6c61fd8a4735ff2d76e8c93df4f93be4de9d3d1aeae2787de8490f27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c134fdd6c61fd8a4735ff2d76e8c93df4f93be4de9d3d1aeae2787de8490f27", kill_on_drop: false }`
[INFO] [stdout] 2c134fdd6c61fd8a4735ff2d76e8c93df4f93be4de9d3d1aeae2787de8490f27
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 01546115556a0676c12fc5919c280ec505123572da3c0a6b8f42150b00d76224
[INFO] running `Command { std: "docker" "start" "-a" "01546115556a0676c12fc5919c280ec505123572da3c0a6b8f42150b00d76224", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling simple_rust_db v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `fs::OpenOptions`
[INFO] [stdout]  --> src/application/file_manager.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::{fs::OpenOptions, io::Result};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/application/file_manager.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]   --> src/application/file_manager.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::path::PathBuf;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]   --> src/application/file_manager.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::collections::HashMap;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]   --> src/application/file_manager.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::fs;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]   --> src/application/file_manager.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::path::Path;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `random_access_disk::RandomAccessDisk`
[INFO] [stdout]   --> src/application/file_manager.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use random_access_disk::RandomAccessDisk;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::WORK_DIR`
[INFO] [stdout]   --> src/application/file_manager.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | use super::WORK_DIR;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fs`
[INFO] [stdout]   --> src/application/file_manager.rs:90:30
[INFO] [stdout]    |
[INFO] [stdout] 90 |     use std::{path::PathBuf, fs};
[INFO] [stdout]    |                              ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arc`, `Mutex`
[INFO] [stdout]  --> src/application/log_manager.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::sync::{Arc, Mutex};
[INFO] [stdout]   |                 ^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Result`
[INFO] [stdout]  --> src/application/log_manager.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `FileManager`, `block::Block`, `page::Page`
[INFO] [stdout]  --> src/application/log_manager.rs:4:27
[INFO] [stdout]   |
[INFO] [stdout] 4 | use super::file_manager::{block::Block, FileManager, page::Page};
[INFO] [stdout]   |                           ^^^^^^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arc`, `Mutex`, `io::*`
[INFO] [stdout]  --> src/application.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{io::*, sync::{Arc, Mutex}};
[INFO] [stdout]   |           ^^^^^         ^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `file_manager::FileManager`, `log_manager::LogManager`
[INFO] [stdout]  --> src/application.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | use self::{file_manager::FileManager, log_manager::LogManager};
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]   --> src/application/file_manager.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::io::*;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `raf`
[INFO] [stdout]    --> src/application/file_manager/storage.rs:103:13
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let raf = self.storage.get(file).unwrap();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_raf`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `raf`
[INFO] [stdout]    --> src/application/file_manager/storage.rs:126:13
[INFO] [stdout]     |
[INFO] [stdout] 126 |         let raf = self.storage.get(file).unwrap();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_raf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/application/file_manager.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn length(&self, file:&str) -> Result<u64> {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] 72 | 
[INFO] [stdout] 73 |         self.length(file)
[INFO] [stdout]    |         ----------------- recursive call site
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/application/file_manager.rs:119:13
[INFO] [stdout]     |
[INFO] [stdout] 119 |         let mut fm = FileManager::new(db_dir.as_path().to_str().unwrap(),BLOCK_SIZE).unwrap();
[INFO] [stdout]     |             ----^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `buffer`
[INFO] [stdout]   --> src/application/file_manager/page.rs:20:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |         pub fn buffer(&mut self) -> &mut [u8]{
[INFO] [stdout]    |                ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `id`
[INFO] [stdout]   --> src/application/file_manager/block.rs:16:16
[INFO] [stdout]    |
[INFO] [stdout] 16 |         pub fn id(&self) -> u64{
[INFO] [stdout]    |                ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `file`
[INFO] [stdout]   --> src/application/file_manager/block.rs:20:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |         pub fn file(&self) -> &str{
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `length`
[INFO] [stdout]   --> src/application/file_manager/storage.rs:90:20
[INFO] [stdout]    |
[INFO] [stdout] 90 |     pub (super) fn length(&mut self,file:&str) -> Result<u64>{
[INFO] [stdout]    |                    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `BLOCK_SIZE`
[INFO] [stdout]   --> src/application.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | static BLOCK_SIZE: u64 = 500; // bytes 
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Application`
[INFO] [stdout]   --> src/application.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Application {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/application/file_manager/storage.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |         raf.read_at(offset*self.block_size, buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/application/file_manager/storage.rs:83:9
[INFO] [stdout]    |
[INFO] [stdout] 83 |         raf.write_at(offset*self.block_size, buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.58s
[INFO] running `Command { std: "docker" "inspect" "01546115556a0676c12fc5919c280ec505123572da3c0a6b8f42150b00d76224", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01546115556a0676c12fc5919c280ec505123572da3c0a6b8f42150b00d76224", kill_on_drop: false }`
[INFO] [stdout] 01546115556a0676c12fc5919c280ec505123572da3c0a6b8f42150b00d76224
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5b9b56b6ceead3d22689cc8495045dd48906dcfd2a93aa1d4da203453ddb148b
[INFO] running `Command { std: "docker" "start" "-a" "5b9b56b6ceead3d22689cc8495045dd48906dcfd2a93aa1d4da203453ddb148b", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `fs::OpenOptions`
[INFO] [stdout] 
[INFO] [stderr]  --> src/application/file_manager.rs:8:11
[INFO] [stdout] running 9 tests
[INFO] [stderr]   |
[INFO] [stdout] test application::file_manager::block::test::test_block_number ... ok
[INFO] [stderr] 8 | use std::{fs::OpenOptions, io::Result};
[INFO] [stdout] test application::file_manager::block::test::test_block_number_err ... ok
[INFO] [stderr]   |           ^^^^^^^^^^^^^^^
[INFO] [stdout] test application::file_manager::page::page_test::test_bytes ... ok
[INFO] [stderr]   |
[INFO] [stdout] test application::file_manager::page::page_test::test_int ... ok
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] test application::file_manager::storage::block::test::test_block_number ... ok
[INFO] [stderr] 
[INFO] [stdout] test application::file_manager::storage::block::test::test_block_number_err ... ok
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stdout] test application::file_manager::storage::page::page_test::test_bytes ... ok
[INFO] [stderr]  --> src/application/file_manager.rs:9:5
[INFO] [stdout] test application::file_manager::storage::page::page_test::test_int ... ok
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::fs::File;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::path::PathBuf`
[INFO] [stderr]   --> src/application/file_manager.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::path::PathBuf;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]   --> src/application/file_manager.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::collections::HashMap;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs`
[INFO] [stderr]   --> src/application/file_manager.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::fs;
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::path::Path`
[INFO] [stderr]   --> src/application/file_manager.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use std::path::Path;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `random_access_disk::RandomAccessDisk`
[INFO] [stderr]   --> src/application/file_manager.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | use random_access_disk::RandomAccessDisk;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::WORK_DIR`
[INFO] [stderr]   --> src/application/file_manager.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 | use super::WORK_DIR;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `fs`
[INFO] [stderr]   --> src/application/file_manager.rs:90:30
[INFO] [stderr]    |
[INFO] [stderr] 90 |     use std::{path::PathBuf, fs};
[INFO] [stderr]    |                              ^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Arc`, `Mutex`
[INFO] [stderr]  --> src/application/log_manager.rs:1:17
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::sync::{Arc, Mutex};
[INFO] [stderr]   |                 ^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Result`
[INFO] [stderr]  --> src/application/log_manager.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::Result;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `FileManager`, `block::Block`, `page::Page`
[INFO] [stderr]  --> src/application/log_manager.rs:4:27
[INFO] [stderr]   |
[INFO] [stderr] 4 | use super::file_manager::{block::Block, FileManager, page::Page};
[INFO] [stderr]   |                           ^^^^^^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Arc`, `Mutex`, `io::*`
[INFO] [stderr]  --> src/application.rs:6:11
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::{io::*, sync::{Arc, Mutex}};
[INFO] [stderr]   |           ^^^^^         ^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `file_manager::FileManager`, `log_manager::LogManager`
[INFO] [stderr]  --> src/application.rs:8:12
[INFO] [stderr]   |
[INFO] [stderr] 8 | use self::{file_manager::FileManager, log_manager::LogManager};
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]   --> src/application/file_manager.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | use std::io::*;
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `raf`
[INFO] [stderr]    --> src/application/file_manager/storage.rs:103:13
[INFO] [stderr]     |
[INFO] [stderr] 103 |         let raf = self.storage.get(file).unwrap();
[INFO] [stderr]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_raf`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `raf`
[INFO] [stderr]    --> src/application/file_manager/storage.rs:126:13
[INFO] [stderr]     |
[INFO] [stderr] 126 |         let raf = self.storage.get(file).unwrap();
[INFO] [stderr]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_raf`
[INFO] [stderr] 
[INFO] [stderr] warning: function cannot return without recursing
[INFO] [stderr]   --> src/application/file_manager.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn length(&self, file:&str) -> Result<u64> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stderr] 72 | 
[INFO] [stderr] 73 |         self.length(file)
[INFO] [stderr]    |         ----------------- recursive call site
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stderr]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/application/file_manager.rs:119:13
[INFO] [stderr]     |
[INFO] [stderr] 119 |         let mut fm = FileManager::new(db_dir.as_path().to_str().unwrap(),BLOCK_SIZE).unwrap();
[INFO] [stderr]     |             ----^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `buffer`
[INFO] [stderr]   --> src/application/file_manager/page.rs:20:16
[INFO] [stderr]    |
[INFO] [stderr] 20 |         pub fn buffer(&mut self) -> &mut [u8]{
[INFO] [stderr]    |                ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `id`
[INFO] [stderr]   --> src/application/file_manager/block.rs:16:16
[INFO] [stderr]    |
[INFO] [stderr] 16 |         pub fn id(&self) -> u64{
[INFO] [stderr]    |                ^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `file`
[INFO] [stderr]   --> src/application/file_manager/block.rs:20:16
[INFO] [stderr]    |
[INFO] [stderr] 20 |         pub fn file(&self) -> &str{
[INFO] [stderr]    |                ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `length`
[INFO] [stderr]   --> src/application/file_manager/storage.rs:90:20
[INFO] [stderr]    |
[INFO] [stderr] 90 |     pub (super) fn length(&mut self,file:&str) -> Result<u64>{
[INFO] [stderr]    |                    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static is never used: `BLOCK_SIZE`
[INFO] [stderr]   --> src/application.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | static BLOCK_SIZE: u64 = 500; // bytes 
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Application`
[INFO] [stderr]   --> src/application.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | struct Application {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/application/file_manager/storage.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |         raf.read_at(offset*self.block_size, buffer);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/application/file_manager/storage.rs:83:9
[INFO] [stderr]    |
[INFO] [stderr] 83 |         raf.write_at(offset*self.block_size, buffer);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 27 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/simple_rust_db-82596c086730ebfa)
[INFO] [stdout] test application::file_manager::test::test_file_manager ... FAILED
[INFO] [stderr] error: test failed, to rerun pass '--bin simple_rust_db'
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- application::file_manager::test::test_file_manager stdout ----
[INFO] [stdout] thread 'application::file_manager::test::test_file_manager' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: Other, message: "Read-only file system" }', src/application/file_manager.rs:121:42
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55c37224db20 - std::backtrace_rs::backtrace::libunwind::trace::h34055254b57d8e79
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stdout]    1:     0x55c37224db20 - std::backtrace_rs::backtrace::trace_unsynchronized::h8f1e3fbd9afff6ec
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x55c37224db20 - std::sys_common::backtrace::_print_fmt::h3a99a796b770c360
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stdout]    3:     0x55c37224db20 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h32d1f94a80615d18
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stdout]    4:     0x55c37227050c - core::fmt::write::h306731c068f7162c
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/fmt/mod.rs:1110:17
[INFO] [stdout]    5:     0x55c37224a8b5 - std::io::Write::write_fmt::h87f19b0a2cd190bc
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/io/mod.rs:1588:15
[INFO] [stdout]    6:     0x55c37224fcab - std::sys_common::backtrace::_print::h5abaa2601a852287
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stdout]    7:     0x55c37224fcab - std::sys_common::backtrace::print::h8d81445442bb638f
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stdout]    8:     0x55c37224fcab - std::panicking::default_hook::{{closure}}::hcfe804496a9fa747
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:208:50
[INFO] [stdout]    9:     0x55c37224f7bc - std::panicking::default_hook::hbea8e3ccf2ba8901
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:222:9
[INFO] [stdout]   10:     0x55c372250374 - std::panicking::rust_panic_with_hook::h7ee9e1a2d0f8975a
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:622:17
[INFO] [stdout]   11:     0x55c37224fe57 - std::panicking::begin_panic_handler::{{closure}}::h8ab3b4491718b2c7
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:519:13
[INFO] [stdout]   12:     0x55c37224e01c - std::sys_common::backtrace::__rust_end_short_backtrace::hd489062ffa586a9f
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stdout]   13:     0x55c37224fdb9 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:515:5
[INFO] [stdout]   14:     0x55c3721e1651 - core::panicking::panic_fmt::hca6330e3e14086b4
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/panicking.rs:92:14
[INFO] [stdout]   15:     0x55c3721e1743 - core::result::unwrap_failed::h6160d2b4bfbb0e87
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/result.rs:1355:5
[INFO] [stdout]   16:     0x55c3721e931c - core::result::Result<T,E>::unwrap::h176e90e86550af71
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/result.rs:1037:23
[INFO] [stdout]   17:     0x55c3721ee467 - simple_rust_db::application::file_manager::test::test_file_manager::hd0dc975c025064af
[INFO] [stdout]                                at /opt/rustwide/workdir/src/application/file_manager.rs:121:21
[INFO] [stdout]   18:     0x55c3721ee28a - simple_rust_db::application::file_manager::test::test_file_manager::{{closure}}::hda98cd907b7ef4e9
[INFO] [stdout]                                at /opt/rustwide/workdir/src/application/file_manager.rs:113:5
[INFO] [stdout]   19:     0x55c3721e58be - core::ops::function::FnOnce::call_once::ha7114f74d022ec7e
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   20:     0x55c372216a33 - core::ops::function::FnOnce::call_once::h152e7e439ff59e19
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   21:     0x55c372216a33 - test::__rust_begin_short_backtrace::h0908f3b1fdbb72ab
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/test/src/lib.rs:577:5
[INFO] [stdout]   22:     0x55c3722154f0 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf6d2a51e5587546c
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/alloc/src/boxed.rs:1575:9
[INFO] [stdout]   23:     0x55c3722154f0 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h8af660f3a89ef593
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panic.rs:347:9
[INFO] [stdout]   24:     0x55c3722154f0 - std::panicking::try::do_call::hd36aef60f84b6d36
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:401:40
[INFO] [stdout]   25:     0x55c3722154f0 - std::panicking::try::h9932b4480e69817c
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:365:19
[INFO] [stdout]   26:     0x55c3722154f0 - std::panic::catch_unwind::h6aa177099cfff5f8
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panic.rs:434:14
[INFO] [stdout]   27:     0x55c3722154f0 - test::run_test_in_process::h5884d6f2d99e20c3
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/test/src/lib.rs:600:18
[INFO] [stdout]   28:     0x55c3722154f0 - test::run_test::run_test_inner::{{closure}}::h6fdc58c6d5f5b6e3
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/test/src/lib.rs:492:39
[INFO] [stdout]   29:     0x55c3721eeba2 - test::run_test::run_test_inner::{{closure}}::h408365d67a78ade8
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/test/src/lib.rs:519:37
[INFO] [stdout]   30:     0x55c3721eeba2 - std::sys_common::backtrace::__rust_begin_short_backtrace::hb560b77c4f701523
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stdout]   31:     0x55c3721f2758 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::hf2e7831dad93c597
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/thread/mod.rs:481:17
[INFO] [stdout]   32:     0x55c3721f2758 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hd2e08783d8be4d02
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panic.rs:347:9
[INFO] [stdout]   33:     0x55c3721f2758 - std::panicking::try::do_call::h062597b7acfd6b82
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:401:40
[INFO] [stdout]   34:     0x55c3721f2758 - std::panicking::try::h0d7b79db04c14552
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:365:19
[INFO] [stdout]   35:     0x55c3721f2758 - std::panic::catch_unwind::hb01a0b5e7c8cd43b
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panic.rs:434:14
[INFO] [stdout]   36:     0x55c3721f2758 - std::thread::Builder::spawn_unchecked::{{closure}}::h5bde48cc887e0d1e
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/thread/mod.rs:480:30
[INFO] [stdout]   37:     0x55c3721f2758 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h745ea30807a29e55
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   38:     0x55c372255007 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7ece6cfefaff1005
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/alloc/src/boxed.rs:1575:9
[INFO] [stdout]   39:     0x55c372255007 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hb8b48e55c21f193e
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/alloc/src/boxed.rs:1575:9
[INFO] [stdout]   40:     0x55c372255007 - std::sys::unix::thread::Thread::new::thread_start::h8c7c4450dba62914
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys/unix/thread.rs:71:17
[INFO] [stdout]   41:     0x7f918a192609 - start_thread
[INFO] [stdout]   42:     0x7f9189f64293 - clone
[INFO] [stdout]   43:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     application::file_manager::test::test_file_manager
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 8 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.06s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5b9b56b6ceead3d22689cc8495045dd48906dcfd2a93aa1d4da203453ddb148b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b9b56b6ceead3d22689cc8495045dd48906dcfd2a93aa1d4da203453ddb148b", kill_on_drop: false }`
[INFO] [stdout] 5b9b56b6ceead3d22689cc8495045dd48906dcfd2a93aa1d4da203453ddb148b
