[INFO] cloning repository https://github.com/PM25000/rust_hw4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PM25000/rust_hw4" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPM25000%2Frust_hw4", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPM25000%2Frust_hw4'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c45863e1f23b9e6ca6b4ec607c50683200acf65d
[INFO] checking PM25000/rust_hw4 against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPM25000%2Frust_hw4" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PM25000/rust_hw4 on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/PM25000/rust_hw4
[INFO] finished tweaking git repo https://github.com/PM25000/rust_hw4
[INFO] tweaked toml for git repo https://github.com/PM25000/rust_hw4 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/PM25000/rust_hw4 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded value-bag v1.4.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f5e96d2ae5abef36dba6cf8f101444c3a345087137eb6451b57eea5f0c0c502b
[INFO] running `Command { std: "docker" "start" "-a" "f5e96d2ae5abef36dba6cf8f101444c3a345087137eb6451b57eea5f0c0c502b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5e96d2ae5abef36dba6cf8f101444c3a345087137eb6451b57eea5f0c0c502b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5e96d2ae5abef36dba6cf8f101444c3a345087137eb6451b57eea5f0c0c502b", kill_on_drop: false }`
[INFO] [stdout] f5e96d2ae5abef36dba6cf8f101444c3a345087137eb6451b57eea5f0c0c502b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bd349430623669ba08bbb0f534b130ca2fb5497a2e642add0529480ce51c66e2
[INFO] running `Command { std: "docker" "start" "-a" "bd349430623669ba08bbb0f534b130ca2fb5497a2e642add0529480ce51c66e2", kill_on_drop: false }`
[INFO] [stderr]     Checking value-bag v1.4.1
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]     Checking io-lifetimes v1.0.11
[INFO] [stderr]     Checking tokio v1.32.0
[INFO] [stderr]    Compiling syn v2.0.31
[INFO] [stderr]     Checking async-executor v1.5.1
[INFO] [stderr]     Checking rustix v0.37.23
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking polling v2.8.0
[INFO] [stderr]     Checking blocking v1.3.1
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking async-io v1.13.0
[INFO] [stderr]     Checking async-global-executor v2.3.1
[INFO] [stderr]     Checking async-std v1.12.0
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]     Checking futures-executor v0.3.28
[INFO] [stderr]     Checking futures v0.3.28
[INFO] [stderr]     Checking hw4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `alloc::System` and `self`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     alloc::System,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 3 |     cell::RefCell,
[INFO] [stdout] 4 |     future::{self, Future},
[INFO] [stdout]   |              ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `alloc::System` and `self`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     alloc::System,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 3 |     cell::RefCell,
[INFO] [stdout] 4 |     future::{self, Future},
[INFO] [stdout]   |              ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dummy_waker` is never used
[INFO] [stdout]   --> src/main.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn dummy_waker() -> Waker {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VTABLE` is never used
[INFO] [stdout]   --> src/main.rs:33:7
[INFO] [stdout]    |
[INFO] [stdout] 33 | const VTABLE: RawWakerVTable =
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `vtable_clone` is never used
[INFO] [stdout]   --> src/main.rs:36:11
[INFO] [stdout]    |
[INFO] [stdout] 36 | unsafe fn vtable_clone(ptr: *const ()) -> RawWaker {
[INFO] [stdout]    |           ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `vtable_wake` is never used
[INFO] [stdout]   --> src/main.rs:41:11
[INFO] [stdout]    |
[INFO] [stdout] 41 | unsafe fn vtable_wake(_ptr: *const ()) {
[INFO] [stdout]    |           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `vtable_wake_by_ref` is never used
[INFO] [stdout]   --> src/main.rs:45:11
[INFO] [stdout]    |
[INFO] [stdout] 45 | unsafe fn vtable_wake_by_ref(_ptr: *const ()) {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `vtable_drop` is never used
[INFO] [stdout]   --> src/main.rs:49:11
[INFO] [stdout]    |
[INFO] [stdout] 49 | unsafe fn vtable_drop(_ptr: *const ()) {
[INFO] [stdout]    |           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dummy_waker` is never used
[INFO] [stdout]   --> src/main.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn dummy_waker() -> Waker {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VTABLE` is never used
[INFO] [stdout]   --> src/main.rs:33:7
[INFO] [stdout]    |
[INFO] [stdout] 33 | const VTABLE: RawWakerVTable =
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `vtable_clone` is never used
[INFO] [stdout]   --> src/main.rs:36:11
[INFO] [stdout]    |
[INFO] [stdout] 36 | unsafe fn vtable_clone(ptr: *const ()) -> RawWaker {
[INFO] [stdout]    |           ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `vtable_wake` is never used
[INFO] [stdout]   --> src/main.rs:41:11
[INFO] [stdout]    |
[INFO] [stdout] 41 | unsafe fn vtable_wake(_ptr: *const ()) {
[INFO] [stdout]    |           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `vtable_wake_by_ref` is never used
[INFO] [stdout]   --> src/main.rs:45:11
[INFO] [stdout]    |
[INFO] [stdout] 45 | unsafe fn vtable_wake_by_ref(_ptr: *const ()) {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `vtable_drop` is never used
[INFO] [stdout]   --> src/main.rs:49:11
[INFO] [stdout]    |
[INFO] [stdout] 49 | unsafe fn vtable_drop(_ptr: *const ()) {
[INFO] [stdout]    |           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.85s
[INFO] running `Command { std: "docker" "inspect" "bd349430623669ba08bbb0f534b130ca2fb5497a2e642add0529480ce51c66e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd349430623669ba08bbb0f534b130ca2fb5497a2e642add0529480ce51c66e2", kill_on_drop: false }`
[INFO] [stdout] bd349430623669ba08bbb0f534b130ca2fb5497a2e642add0529480ce51c66e2