[INFO] cloning repository https://github.com/ryosukeeeee/rust_rdbms_scratch
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ryosukeeeee/rust_rdbms_scratch" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fryosukeeeee%2Frust_rdbms_scratch", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fryosukeeeee%2Frust_rdbms_scratch'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 98e53fe3065b2dd8f2f595b369e2ac25e9c3237c
[INFO] testing ryosukeeeee/rust_rdbms_scratch against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fryosukeeeee%2Frust_rdbms_scratch" "/workspace/builds/worker-55/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-55/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ryosukeeeee/rust_rdbms_scratch on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ryosukeeeee/rust_rdbms_scratch
[INFO] finished tweaking git repo https://github.com/ryosukeeeee/rust_rdbms_scratch
[INFO] tweaked toml for git repo https://github.com/ryosukeeeee/rust_rdbms_scratch written to /workspace/builds/worker-55/source/Cargo.toml
[INFO] crate git repo https://github.com/ryosukeeeee/rust_rdbms_scratch already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ede5a448bc7277496eb79f2fa1852e7141c3e843fd2c6cfe4b59ce132e5c596a
[INFO] running `Command { std: "docker" "start" "-a" "ede5a448bc7277496eb79f2fa1852e7141c3e843fd2c6cfe4b59ce132e5c596a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ede5a448bc7277496eb79f2fa1852e7141c3e843fd2c6cfe4b59ce132e5c596a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ede5a448bc7277496eb79f2fa1852e7141c3e843fd2c6cfe4b59ce132e5c596a", kill_on_drop: false }`
[INFO] [stdout] ede5a448bc7277496eb79f2fa1852e7141c3e843fd2c6cfe4b59ce132e5c596a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 795b67d75da537d03d34d9a82f6064660a8e907c40f83471dbf50e5b12966a82
[INFO] running `Command { std: "docker" "start" "-a" "795b67d75da537d03d34d9a82f6064660a8e907c40f83471dbf50e5b12966a82", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.71
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling thiserror v1.0.24
[INFO] [stderr]    Compiling rust_rdbms_practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `usage_count`
[INFO] [stdout]   --> src/buffer.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     usage_count: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `buffer`
[INFO] [stdout]   --> src/buffer.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     buffer: Rc<Buffer>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `next_victim_id`
[INFO] [stdout]   --> src/buffer.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     next_victim_id: BufferId,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `size`
[INFO] [stdout]   --> src/buffer.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn size(&self) -> usize {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `evict`
[INFO] [stdout]   --> src/buffer.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn evict(&mut self) -> Option<BufferId> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `increment_id`
[INFO] [stdout]   --> src/buffer.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 |     fn increment_id(&self, buffer_id: BufferId) -> BufferId {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `disk`
[INFO] [stdout]   --> src/buffer.rs:85:5
[INFO] [stdout]    |
[INFO] [stdout] 85 |     disk: DiskManager,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `pool`
[INFO] [stdout]   --> src/buffer.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pool: BufferPool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `page_table`
[INFO] [stdout]   --> src/buffer.rs:87:5
[INFO] [stdout]    |
[INFO] [stdout] 87 |     page_table: HashMap<PageId, BufferId>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fetch_page`
[INFO] [stdout]   --> src/buffer.rs:91:8
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn fetch_page(&mut self, page_id: PageId) -> Result<Rc<Buffer>, Error> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3m 18s
[INFO] running `Command { std: "docker" "inspect" "795b67d75da537d03d34d9a82f6064660a8e907c40f83471dbf50e5b12966a82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "795b67d75da537d03d34d9a82f6064660a8e907c40f83471dbf50e5b12966a82", kill_on_drop: false }`
[INFO] [stdout] 795b67d75da537d03d34d9a82f6064660a8e907c40f83471dbf50e5b12966a82
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 60fb50dff213cf1cd399546a4e01e51cc4bcfd41e5c8e847b9505639dc95181b
[INFO] running `Command { std: "docker" "start" "-a" "60fb50dff213cf1cd399546a4e01e51cc4bcfd41e5c8e847b9505639dc95181b", kill_on_drop: false }`
[INFO] [stdout] warning: field is never read: `usage_count`
[INFO] [stdout]   --> src/buffer.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     usage_count: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `buffer`
[INFO] [stdout]   --> src/buffer.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     buffer: Rc<Buffer>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `next_victim_id`
[INFO] [stdout]   --> src/buffer.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     next_victim_id: BufferId,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `size`
[INFO] [stdout]   --> src/buffer.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn size(&self) -> usize {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `evict`
[INFO] [stdout]   --> src/buffer.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn evict(&mut self) -> Option<BufferId> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `increment_id`
[INFO] [stdout]   --> src/buffer.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 |     fn increment_id(&self, buffer_id: BufferId) -> BufferId {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust_rdbms_practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `disk`
[INFO] [stdout]   --> src/buffer.rs:85:5
[INFO] [stdout]    |
[INFO] [stdout] 85 |     disk: DiskManager,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `pool`
[INFO] [stdout]   --> src/buffer.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pool: BufferPool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `page_table`
[INFO] [stdout]   --> src/buffer.rs:87:5
[INFO] [stdout]    |
[INFO] [stdout] 87 |     page_table: HashMap<PageId, BufferId>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fetch_page`
[INFO] [stdout]   --> src/buffer.rs:91:8
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn fetch_page(&mut self, page_id: PageId) -> Result<Rc<Buffer>, Error> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `usage_count`
[INFO] [stdout]   --> src/buffer.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     usage_count: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `buffer`
[INFO] [stdout]   --> src/buffer.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     buffer: Rc<Buffer>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `next_victim_id`
[INFO] [stdout]   --> src/buffer.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     next_victim_id: BufferId,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `size`
[INFO] [stdout]   --> src/buffer.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn size(&self) -> usize {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `evict`
[INFO] [stdout]   --> src/buffer.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn evict(&mut self) -> Option<BufferId> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `increment_id`
[INFO] [stdout]   --> src/buffer.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 |     fn increment_id(&self, buffer_id: BufferId) -> BufferId {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `disk`
[INFO] [stdout]   --> src/buffer.rs:85:5
[INFO] [stdout]    |
[INFO] [stdout] 85 |     disk: DiskManager,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `pool`
[INFO] [stdout]   --> src/buffer.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pool: BufferPool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `page_table`
[INFO] [stdout]   --> src/buffer.rs:87:5
[INFO] [stdout]    |
[INFO] [stdout] 87 |     page_table: HashMap<PageId, BufferId>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fetch_page`
[INFO] [stdout]   --> src/buffer.rs:91:8
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn fetch_page(&mut self, page_id: PageId) -> Result<Rc<Buffer>, Error> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `Command { std: "docker" "inspect" "60fb50dff213cf1cd399546a4e01e51cc4bcfd41e5c8e847b9505639dc95181b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60fb50dff213cf1cd399546a4e01e51cc4bcfd41e5c8e847b9505639dc95181b", kill_on_drop: false }`
[INFO] [stdout] 60fb50dff213cf1cd399546a4e01e51cc4bcfd41e5c8e847b9505639dc95181b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d26045c0e55f25510c4aa19fa149cd239c7ee99c63133225c6fbf8e68126f921
[INFO] running `Command { std: "docker" "start" "-a" "d26045c0e55f25510c4aa19fa149cd239c7ee99c63133225c6fbf8e68126f921", kill_on_drop: false }`
[INFO] [stderr] warning: field is never read: `usage_count`
[INFO] [stderr]   --> src/buffer.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     usage_count: u64,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `buffer`
[INFO] [stderr]   --> src/buffer.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     buffer: Rc<Buffer>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `next_victim_id`
[INFO] [stderr]   --> src/buffer.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     next_victim_id: BufferId,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `size`
[INFO] [stderr]   --> src/buffer.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn size(&self) -> usize {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `evict`
[INFO] [stderr]   --> src/buffer.rs:39:8
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn evict(&mut self) -> Option<BufferId> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `increment_id`
[INFO] [stderr]   --> src/buffer.rs:65:8
[INFO] [stderr]    |
[INFO] [stderr] 65 |     fn increment_id(&self, buffer_id: BufferId) -> BufferId {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `disk`
[INFO] [stderr]   --> src/buffer.rs:85:5
[INFO] [stderr]    |
[INFO] [stderr] 85 |     disk: DiskManager,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `pool`
[INFO] [stderr]   --> src/buffer.rs:86:5
[INFO] [stderr]    |
[INFO] [stderr] 86 |     pool: BufferPool,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `page_table`
[INFO] [stderr]   --> src/buffer.rs:87:5
[INFO] [stderr]    |
[INFO] [stderr] 87 |     page_table: HashMap<PageId, BufferId>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `fetch_page`
[INFO] [stderr]   --> src/buffer.rs:91:8
[INFO] [stderr]    |
[INFO] [stderr] 91 |     fn fetch_page(&mut self, page_id: PageId) -> Result<Rc<Buffer>, Error> {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_rdbms_practice` (lib) generated 10 warnings
[INFO] [stderr] warning: `rust_rdbms_practice` (lib test) generated 10 warnings (10 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_rdbms_practice-77c1bc1be25431e2)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rust_rdbms_practice
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d26045c0e55f25510c4aa19fa149cd239c7ee99c63133225c6fbf8e68126f921", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d26045c0e55f25510c4aa19fa149cd239c7ee99c63133225c6fbf8e68126f921", kill_on_drop: false }`
[INFO] [stdout] d26045c0e55f25510c4aa19fa149cd239c7ee99c63133225c6fbf8e68126f921