[INFO] cloning repository https://github.com/anish-sinha1/symmetric-concurrent-v4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/anish-sinha1/symmetric-concurrent-v4" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanish-sinha1%2Fsymmetric-concurrent-v4", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanish-sinha1%2Fsymmetric-concurrent-v4'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6ad98f08d320ab466872bf4ba74abeeaea8a55a6
[INFO] checking anish-sinha1/symmetric-concurrent-v4 against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanish-sinha1%2Fsymmetric-concurrent-v4" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/anish-sinha1/symmetric-concurrent-v4
[INFO] finished tweaking git repo https://github.com/anish-sinha1/symmetric-concurrent-v4
[INFO] tweaked toml for git repo https://github.com/anish-sinha1/symmetric-concurrent-v4 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/anish-sinha1/symmetric-concurrent-v4 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/anish-sinha1/symmetric-concurrent-v4 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_with_macros v2.0.1
[INFO] [stderr]   Downloaded darling_macro v0.14.1
[INFO] [stderr]   Downloaded iana-time-zone v0.1.50
[INFO] [stderr]   Downloaded darling_core v0.14.1
[INFO] [stderr]   Downloaded darling v0.14.1
[INFO] [stderr]   Downloaded time v0.3.14
[INFO] [stderr]   Downloaded serde_with v2.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 81530dfe51fcf7d26fb38e2a08b1d9f6ec4dfd0f714c5aea7f6b65e7079eaa52
[INFO] running `Command { std: "docker" "start" "-a" "81530dfe51fcf7d26fb38e2a08b1d9f6ec4dfd0f714c5aea7f6b65e7079eaa52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "81530dfe51fcf7d26fb38e2a08b1d9f6ec4dfd0f714c5aea7f6b65e7079eaa52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81530dfe51fcf7d26fb38e2a08b1d9f6ec4dfd0f714c5aea7f6b65e7079eaa52", kill_on_drop: false }`
[INFO] [stdout] 81530dfe51fcf7d26fb38e2a08b1d9f6ec4dfd0f714c5aea7f6b65e7079eaa52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e572841c2c026316a999782c449449ddd0dd9dc10e633ddd6f1ce4cdc43bfbb6
[INFO] running `Command { std: "docker" "start" "-a" "e572841c2c026316a999782c449449ddd0dd9dc10e633ddd6f1ce4cdc43bfbb6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.46
[INFO] [stderr]    Compiling libc v0.2.134
[INFO] [stderr]    Compiling unicode-ident v1.0.4
[INFO] [stderr]    Compiling syn v1.0.101
[INFO] [stderr]    Compiling serde_derive v1.0.145
[INFO] [stderr]    Compiling serde v1.0.145
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]     Checking iana-time-zone v0.1.50
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking rayon-core v1.9.3
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking chrono v0.4.22
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rayon v1.5.3
[INFO] [stderr]    Compiling darling_core v0.14.1
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling darling_macro v0.14.1
[INFO] [stderr]    Compiling darling v0.14.1
[INFO] [stderr]    Compiling serde_with_macros v2.0.1
[INFO] [stderr]     Checking serde_bytes v0.11.7
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking serde_with v2.0.1
[INFO] [stderr]     Checking symmetric-concurrent-v4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/storage/buffer/diskmgr.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |         let mut inner = self.inner();
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/storage/buffer/diskmgr.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut inner = self.inner();
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/storage/buffer/diskmgr.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |         let mut inner = self.inner();
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/storage/buffer/diskmgr.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut inner = self.inner();
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `read_page` and `write_page` are never used
[INFO] [stdout]   --> src/storage/buffer/diskmgr.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub trait DiskApi {
[INFO] [stdout]    |           ------- methods in this trait
[INFO] [stdout] 17 |     fn create(path: &str) -> Self;
[INFO] [stdout] 18 |     fn read_page(&self, buf: &mut [u8; PAGE_SIZE], offset: u64) -> std::io::Result<()>;
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 19 |     fn write_page(&self, buf: &[u8; PAGE_SIZE], offset: u64) -> std::io::Result<()>;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `write_bytes` is never used
[INFO] [stdout]  --> src/storage/buffer/fs.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn write_bytes(mut handle: &File, bytes: &[u8; PAGE_SIZE], offset: u64) -> std::io::Result<()> {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_bytes` is never used
[INFO] [stdout]   --> src/storage/buffer/fs.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub fn read_bytes(
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `BinarySemaphore` is never used
[INFO] [stdout]   --> src/sync/mod.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub type BinarySemaphore = Arc<(Mutex<bool>, Condvar)>;
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `BinarySemaphoreMethods` is never used
[INFO] [stdout]   --> src/sync/mod.rs:39:11
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub trait BinarySemaphoreMethods {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `latch` and `unlatch` are never used
[INFO] [stdout]   --> src/sync/mod.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub trait Latch<T> {
[INFO] [stdout]    |           ----- methods in this trait
[INFO] [stdout] 47 |     fn init(item: T) -> Self;
[INFO] [stdout] 48 |     fn latch(&self);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 49 |     fn unlatch(&self);
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]   --> src/sync/mod.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub trait RwLatch<T> {
[INFO] [stdout]    |           ------- methods in this trait
[INFO] [stdout] 54 |     fn init(item: T) -> Self;
[INFO] [stdout] 55 |     fn latch_shared(&self);
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 56 |     fn latch_upgradable(&self);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 57 |     fn latch_excl(&self);
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 58 |     fn unlatch_shared(&self);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 59 |     fn unlatch_upgradable(&self);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 60 |     fn unlatch_excl(&self);
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 61 |     fn latch_upgrade_shared(&self);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `latch_shared`, `latch_excl`, and `unlatch_shared` are never used
[INFO] [stdout]   --> src/sync/mod.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub trait RwLatch<T> {
[INFO] [stdout]    |           ------- methods in this trait
[INFO] [stdout] 54 |     fn init(item: T) -> Self;
[INFO] [stdout] 55 |     fn latch_shared(&self);
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 56 |     fn latch_upgradable(&self);
[INFO] [stdout] 57 |     fn latch_excl(&self);
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 58 |     fn unlatch_shared(&self);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 25.79s
[INFO] running `Command { std: "docker" "inspect" "e572841c2c026316a999782c449449ddd0dd9dc10e633ddd6f1ce4cdc43bfbb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e572841c2c026316a999782c449449ddd0dd9dc10e633ddd6f1ce4cdc43bfbb6", kill_on_drop: false }`
[INFO] [stdout] e572841c2c026316a999782c449449ddd0dd9dc10e633ddd6f1ce4cdc43bfbb6
