[INFO] cloning repository https://github.com/CairBin/rs_db
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CairBin/rs_db" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCairBin%2Frs_db", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCairBin%2Frs_db'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0adefd8680b0f7aba709b2dd3fa3b57c1f816381
[INFO] building CairBin/rs_db against master#ad211ced81509462cdfe4c29ed10f97279a0acae for pr-135216
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCairBin%2Frs_db" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/CairBin/rs_db on toolchain ad211ced81509462cdfe4c29ed10f97279a0acae
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/CairBin/rs_db
[INFO] finished tweaking git repo https://github.com/CairBin/rs_db
[INFO] tweaked toml for git repo https://github.com/CairBin/rs_db written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/CairBin/rs_db already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a085c5a2909af1fbea475e750e698d7dca8df7f4bc35809d4d31500fdfeff946
[INFO] running `Command { std: "docker" "start" "-a" "a085c5a2909af1fbea475e750e698d7dca8df7f4bc35809d4d31500fdfeff946", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a085c5a2909af1fbea475e750e698d7dca8df7f4bc35809d4d31500fdfeff946", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a085c5a2909af1fbea475e750e698d7dca8df7f4bc35809d4d31500fdfeff946", kill_on_drop: false }`
[INFO] [stdout] a085c5a2909af1fbea475e750e698d7dca8df7f4bc35809d4d31500fdfeff946
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 08d273b1aa8f76de91401669d2a5562143fbab8ece4823a5230a247040727e2a
[INFO] running `Command { std: "docker" "start" "-a" "08d273b1aa8f76de91401669d2a5562143fbab8ece4823a5230a247040727e2a", kill_on_drop: false }`
[INFO] [stderr]    Compiling rs_db v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `is_new` is never read
[INFO] [stdout]   --> src/file_manager/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct FileManager{
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 13 |     is_new: bool,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FileManager` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/file_manager/page.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         self.set_bytes(offset, bytes);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let _ = self.set_bytes(offset, bytes);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FileManager` is never constructed
[INFO] [stdout]   --> src/file_manager/mod.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct FileManager{
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FileManager` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/file_manager/mod.rs:18:12
[INFO] [stdout]     |
[INFO] [stdout] 17  | impl FileManager{
[INFO] [stdout]     | ---------------- associated items in this implementation
[INFO] [stdout] 18  |     pub fn new(dir:&str, block_size:u64) -> Result<Self, Box<dyn std::error::Error>>{
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 42  |     pub fn to_mutex(self) -> std::sync::Mutex<Self>{
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 46  |     pub fn to_rw_lock(self) -> std::sync::RwLock<Self>{
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 50  |     fn set_file(&mut self, filename:&str) ->Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 75  |     pub fn get_file_mut(&mut self, filename:&str)->Option<&mut std::fs::File>{
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 79  |     pub fn get_file(&self, filename:&str)->Option<&std::fs::File>{
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 83  |     pub fn exists(&self, filename:&str) ->bool{
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 88  |     pub fn get_block_size(&self)->u64{
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 92  |     pub fn read(manager: &std::sync::Mutex<Self>, block:&BlockId, page:&std::sync::Mutex<Page>)->Result<usize, Box<dyn std::error::Error>>{
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |     pub fn read_without_mutex(&mut self, block: &BlockId, page: &mut Page) -> Result<usize, Box< dyn std::error::Error> >{
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 129 |     pub fn write(manager:&std::sync::Mutex<Self>, block:&BlockId, page:&std::sync::Mutex<Page>) -> Result<usize, Box<dyn std::error::Erro...
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 148 |     pub fn write_without_mutex(&mut self, block: &BlockId, page: &Page)->Result<usize, Box<dyn std::error::Error>>{
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 164 |     pub fn block_num(&mut self, filename:&str)->Result<u64, Box<dyn std::error::Error>>{
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 178 |     pub fn append(&mut self, filename:&str) -> Result<BlockId, Box<dyn std::error::Error>>{
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get_block_number`, `get_filename`, `equal`, and `get_hash_code` are never used
[INFO] [stdout]   --> src/file_manager/block.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl BlockId{
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 10 |     pub fn new(filename:&str, block_number:u64) -> Self{
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn get_block_number(&self) -> u64{
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn get_filename(&self) -> &str{
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn equal(&self, other:&Self) -> bool{
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     pub fn get_hash_code(&self) -> u64{
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Page` is never constructed
[INFO] [stdout]  --> src/file_manager/page.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Page{
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Page` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/file_manager/page.rs:9:12
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl Page{
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 9  |     pub fn new_as_bytes(bytes:&[u8]) -> Self{
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub fn new_as_size(size:usize)->Self{
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn to_mutex(self) -> std::sync::Mutex<Self>{
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn get_u64(&self, offset:usize)->Result<u64, Box<dyn std::error::Error>>{
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     pub fn set_u64(&mut self, offset:usize, val:u64)->Result<(),Box<dyn std::error::Error>>{
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub fn get_bytes(&self, offset:usize) -> Result<&[u8],Box<dyn std::error::Error>>{
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     pub fn set_bytes(&mut self, offset:usize, bytes:&[u8]) -> Result<(), Box<dyn std::error::Error>>{
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     pub fn get_string(&self, offset:usize) -> Result<&str, Box<dyn std::error::Error>>{
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 56 |     pub fn set_string(&mut self, offset:usize, string:&str) -> Result<(), Box<dyn std::error::Error>>{
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |     pub fn contents_mut(&mut self)->&mut [u8]{
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |     pub fn contents(&self) -> &[u8]{
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 73 |     pub fn max_length_for_string(string:&str)->usize{
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/file_manager/page.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         self.set_bytes(offset, bytes);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let _ = self.set_bytes(offset, bytes);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "08d273b1aa8f76de91401669d2a5562143fbab8ece4823a5230a247040727e2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08d273b1aa8f76de91401669d2a5562143fbab8ece4823a5230a247040727e2a", kill_on_drop: false }`
[INFO] [stdout] 08d273b1aa8f76de91401669d2a5562143fbab8ece4823a5230a247040727e2a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f85bd4f131c23d410c1f55684ead2fa9852f9fe17d56fbe7b4023a3b8279eb6
[INFO] running `Command { std: "docker" "start" "-a" "6f85bd4f131c23d410c1f55684ead2fa9852f9fe17d56fbe7b4023a3b8279eb6", kill_on_drop: false }`
[INFO] [stdout] warning: field `is_new` is never read
[INFO] [stdout]   --> src/file_manager/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct FileManager{
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 13 |     is_new: bool,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FileManager` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/file_manager/page.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         self.set_bytes(offset, bytes);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let _ = self.set_bytes(offset, bytes);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FileManager` is never constructed
[INFO] [stdout]   --> src/file_manager/mod.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct FileManager{
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FileManager` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/file_manager/mod.rs:18:12
[INFO] [stdout]     |
[INFO] [stdout] 17  | impl FileManager{
[INFO] [stdout]     | ---------------- associated items in this implementation
[INFO] [stdout] 18  |     pub fn new(dir:&str, block_size:u64) -> Result<Self, Box<dyn std::error::Error>>{
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 42  |     pub fn to_mutex(self) -> std::sync::Mutex<Self>{
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 46  |     pub fn to_rw_lock(self) -> std::sync::RwLock<Self>{
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 50  |     fn set_file(&mut self, filename:&str) ->Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 75  |     pub fn get_file_mut(&mut self, filename:&str)->Option<&mut std::fs::File>{
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 79  |     pub fn get_file(&self, filename:&str)->Option<&std::fs::File>{
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 83  |     pub fn exists(&self, filename:&str) ->bool{
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 88  |     pub fn get_block_size(&self)->u64{
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 92  |     pub fn read(manager: &std::sync::Mutex<Self>, block:&BlockId, page:&std::sync::Mutex<Page>)->Result<usize, Box<dyn std::error::Error>>{
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |     pub fn read_without_mutex(&mut self, block: &BlockId, page: &mut Page) -> Result<usize, Box< dyn std::error::Error> >{
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 129 |     pub fn write(manager:&std::sync::Mutex<Self>, block:&BlockId, page:&std::sync::Mutex<Page>) -> Result<usize, Box<dyn std::error::Erro...
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 148 |     pub fn write_without_mutex(&mut self, block: &BlockId, page: &Page)->Result<usize, Box<dyn std::error::Error>>{
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 164 |     pub fn block_num(&mut self, filename:&str)->Result<u64, Box<dyn std::error::Error>>{
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 178 |     pub fn append(&mut self, filename:&str) -> Result<BlockId, Box<dyn std::error::Error>>{
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get_block_number`, `get_filename`, `equal`, and `get_hash_code` are never used
[INFO] [stdout]   --> src/file_manager/block.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl BlockId{
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 10 |     pub fn new(filename:&str, block_number:u64) -> Self{
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn get_block_number(&self) -> u64{
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn get_filename(&self) -> &str{
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn equal(&self, other:&Self) -> bool{
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     pub fn get_hash_code(&self) -> u64{
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rs_db v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Page` is never constructed
[INFO] [stdout]  --> src/file_manager/page.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Page{
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Page` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/file_manager/page.rs:9:12
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl Page{
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 9  |     pub fn new_as_bytes(bytes:&[u8]) -> Self{
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub fn new_as_size(size:usize)->Self{
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn to_mutex(self) -> std::sync::Mutex<Self>{
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn get_u64(&self, offset:usize)->Result<u64, Box<dyn std::error::Error>>{
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     pub fn set_u64(&mut self, offset:usize, val:u64)->Result<(),Box<dyn std::error::Error>>{
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub fn get_bytes(&self, offset:usize) -> Result<&[u8],Box<dyn std::error::Error>>{
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     pub fn set_bytes(&mut self, offset:usize, bytes:&[u8]) -> Result<(), Box<dyn std::error::Error>>{
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     pub fn get_string(&self, offset:usize) -> Result<&str, Box<dyn std::error::Error>>{
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 56 |     pub fn set_string(&mut self, offset:usize, string:&str) -> Result<(), Box<dyn std::error::Error>>{
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |     pub fn contents_mut(&mut self)->&mut [u8]{
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |     pub fn contents(&self) -> &[u8]{
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 73 |     pub fn max_length_for_string(string:&str)->usize{
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/file_manager/page.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         self.set_bytes(offset, bytes);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let _ = self.set_bytes(offset, bytes);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rs_db::file_manager::page::Page as Page`
[INFO] [stdout]  --> tests/file_manager_test.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rs_db::file_manager::page::Page as Page;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rs_db::file_manager::block::BlockId as BlockId`
[INFO] [stdout]  --> tests/file_manager_test.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rs_db::file_manager::block::BlockId as BlockId;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> tests/logger_test.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rs_db::file_manager::{self, FileManager};
[INFO] [stdout]   |                           ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> tests/logger_test.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     self, Logger, U64_BYTES
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> tests/page_test.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let mut page = file_manager::page::Page::new_as_bytes(&bytes);
[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: field `is_new` is never read
[INFO] [stdout]   --> src/file_manager/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct FileManager{
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 13 |     is_new: bool,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FileManager` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/file_manager/page.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         self.set_bytes(offset, bytes);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let _ = self.set_bytes(offset, bytes);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FileManager` is never constructed
[INFO] [stdout]   --> src/file_manager/mod.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct FileManager{
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FileManager` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/file_manager/mod.rs:18:12
[INFO] [stdout]     |
[INFO] [stdout] 17  | impl FileManager{
[INFO] [stdout]     | ---------------- associated items in this implementation
[INFO] [stdout] 18  |     pub fn new(dir:&str, block_size:u64) -> Result<Self, Box<dyn std::error::Error>>{
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 42  |     pub fn to_mutex(self) -> std::sync::Mutex<Self>{
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 46  |     pub fn to_rw_lock(self) -> std::sync::RwLock<Self>{
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 50  |     fn set_file(&mut self, filename:&str) ->Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 75  |     pub fn get_file_mut(&mut self, filename:&str)->Option<&mut std::fs::File>{
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 79  |     pub fn get_file(&self, filename:&str)->Option<&std::fs::File>{
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 83  |     pub fn exists(&self, filename:&str) ->bool{
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 88  |     pub fn get_block_size(&self)->u64{
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 92  |     pub fn read(manager: &std::sync::Mutex<Self>, block:&BlockId, page:&std::sync::Mutex<Page>)->Result<usize, Box<dyn std::error::Error>>{
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |     pub fn read_without_mutex(&mut self, block: &BlockId, page: &mut Page) -> Result<usize, Box< dyn std::error::Error> >{
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 129 |     pub fn write(manager:&std::sync::Mutex<Self>, block:&BlockId, page:&std::sync::Mutex<Page>) -> Result<usize, Box<dyn std::error::Erro...
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 148 |     pub fn write_without_mutex(&mut self, block: &BlockId, page: &Page)->Result<usize, Box<dyn std::error::Error>>{
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 164 |     pub fn block_num(&mut self, filename:&str)->Result<u64, Box<dyn std::error::Error>>{
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 178 |     pub fn append(&mut self, filename:&str) -> Result<BlockId, Box<dyn std::error::Error>>{
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get_block_number`, `get_filename`, `equal`, and `get_hash_code` are never used
[INFO] [stdout]   --> src/file_manager/block.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl BlockId{
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 10 |     pub fn new(filename:&str, block_number:u64) -> Self{
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn get_block_number(&self) -> u64{
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn get_filename(&self) -> &str{
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn equal(&self, other:&Self) -> bool{
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     pub fn get_hash_code(&self) -> u64{
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Page` is never constructed
[INFO] [stdout]  --> src/file_manager/page.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Page{
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Page` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/file_manager/page.rs:9:12
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl Page{
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 9  |     pub fn new_as_bytes(bytes:&[u8]) -> Self{
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub fn new_as_size(size:usize)->Self{
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn to_mutex(self) -> std::sync::Mutex<Self>{
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn get_u64(&self, offset:usize)->Result<u64, Box<dyn std::error::Error>>{
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     pub fn set_u64(&mut self, offset:usize, val:u64)->Result<(),Box<dyn std::error::Error>>{
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub fn get_bytes(&self, offset:usize) -> Result<&[u8],Box<dyn std::error::Error>>{
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     pub fn set_bytes(&mut self, offset:usize, bytes:&[u8]) -> Result<(), Box<dyn std::error::Error>>{
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     pub fn get_string(&self, offset:usize) -> Result<&str, Box<dyn std::error::Error>>{
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 56 |     pub fn set_string(&mut self, offset:usize, string:&str) -> Result<(), Box<dyn std::error::Error>>{
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |     pub fn contents_mut(&mut self)->&mut [u8]{
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |     pub fn contents(&self) -> &[u8]{
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 73 |     pub fn max_length_for_string(string:&str)->usize{
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/file_manager/page.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         self.set_bytes(offset, bytes);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let _ = self.set_bytes(offset, bytes);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `Command { std: "docker" "inspect" "6f85bd4f131c23d410c1f55684ead2fa9852f9fe17d56fbe7b4023a3b8279eb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f85bd4f131c23d410c1f55684ead2fa9852f9fe17d56fbe7b4023a3b8279eb6", kill_on_drop: false }`
[INFO] [stdout] 6f85bd4f131c23d410c1f55684ead2fa9852f9fe17d56fbe7b4023a3b8279eb6
