[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] testing PM25000/rust_hw4/c45863e1f23b9e6ca6b4ec607c50683200acf65d against master#9e136a30a965bf4e63f03095c57df7257bf96fd6 for pr-134530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPM25000%2Frust_hw4" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PM25000/rust_hw4 on toolchain 9e136a30a965bf4e63f03095c57df7257bf96fd6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9e136a30a965bf4e63f03095c57df7257bf96fd6" "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-3-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" "+9e136a30a965bf4e63f03095c57df7257bf96fd6" "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-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+9e136a30a965bf4e63f03095c57df7257bf96fd6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0014c3349272b8e1f7d61ebe50130719a7a304b491c94ccfb0c3c25b82f5c966
[INFO] running `Command { std: "docker" "start" "-a" "0014c3349272b8e1f7d61ebe50130719a7a304b491c94ccfb0c3c25b82f5c966", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0014c3349272b8e1f7d61ebe50130719a7a304b491c94ccfb0c3c25b82f5c966", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0014c3349272b8e1f7d61ebe50130719a7a304b491c94ccfb0c3c25b82f5c966", kill_on_drop: false }`
[INFO] [stdout] 0014c3349272b8e1f7d61ebe50130719a7a304b491c94ccfb0c3c25b82f5c966
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+9e136a30a965bf4e63f03095c57df7257bf96fd6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ae62f4bdc095f7d36b4e9143a478864ceca41433119ee89180426045eee03be7
[INFO] running `Command { std: "docker" "start" "-a" "ae62f4bdc095f7d36b4e9143a478864ceca41433119ee89180426045eee03be7", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling pin-project-lite v0.2.13
[INFO] [stderr]    Compiling memchr v2.6.3
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling futures-io v0.3.28
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]    Compiling value-bag v1.4.1
[INFO] [stderr]    Compiling event-listener v2.5.3
[INFO] [stderr]    Compiling fastrand v1.9.0
[INFO] [stderr]    Compiling parking v2.1.0
[INFO] [stderr]    Compiling waker-fn v1.1.0
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]    Compiling rustix v0.37.23
[INFO] [stderr]    Compiling futures-sink v0.3.28
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling async-lock v2.8.0
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling async-task v4.4.0
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling linux-raw-sys v0.3.8
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling atomic-waker v1.1.1
[INFO] [stderr]    Compiling once_cell v1.18.0
[INFO] [stderr]    Compiling tokio v1.32.0
[INFO] [stderr]    Compiling scoped-tls v1.0.1
[INFO] [stderr]    Compiling futures-lite v1.13.0
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling polling v2.8.0
[INFO] [stderr]    Compiling async-io v1.13.0
[INFO] [stderr]    Compiling concurrent-queue v2.2.0
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling kv-log-macro v1.0.7
[INFO] [stderr]    Compiling async-channel v1.9.0
[INFO] [stderr]    Compiling socket2 v0.4.9
[INFO] [stderr]    Compiling syn v2.0.31
[INFO] [stderr]    Compiling blocking v1.3.1
[INFO] [stderr]    Compiling async-executor v1.5.1
[INFO] [stderr]    Compiling async-global-executor v2.3.1
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]    Compiling async-std v1.12.0
[INFO] [stderr]    Compiling futures-executor v0.3.28
[INFO] [stderr]    Compiling futures v0.3.28
[INFO] [stderr]    Compiling 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: 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.12s
[INFO] running `Command { std: "docker" "inspect" "ae62f4bdc095f7d36b4e9143a478864ceca41433119ee89180426045eee03be7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae62f4bdc095f7d36b4e9143a478864ceca41433119ee89180426045eee03be7", kill_on_drop: false }`
[INFO] [stdout] ae62f4bdc095f7d36b4e9143a478864ceca41433119ee89180426045eee03be7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+9e136a30a965bf4e63f03095c57df7257bf96fd6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8d3363c78afab5d2c253072bb2088776e3642df2d15a142985d64acb62051a65
[INFO] running `Command { std: "docker" "start" "-a" "8d3363c78afab5d2c253072bb2088776e3642df2d15a142985d64acb62051a65", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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: 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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "8d3363c78afab5d2c253072bb2088776e3642df2d15a142985d64acb62051a65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d3363c78afab5d2c253072bb2088776e3642df2d15a142985d64acb62051a65", kill_on_drop: false }`
[INFO] [stdout] 8d3363c78afab5d2c253072bb2088776e3642df2d15a142985d64acb62051a65
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+9e136a30a965bf4e63f03095c57df7257bf96fd6" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e9054ea246e33364a68378d8147d5d72f668e65461436bae0a5cb27cc90c4c45
[INFO] running `Command { std: "docker" "start" "-a" "e9054ea246e33364a68378d8147d5d72f668e65461436bae0a5cb27cc90c4c45", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `alloc::System` and `self`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 |     alloc::System,
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 3 |     cell::RefCell,
[INFO] [stderr] 4 |     future::{self, Future},
[INFO] [stderr]   |              ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `dummy_waker` is never used
[INFO] [stderr]   --> src/main.rs:28:4
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn dummy_waker() -> Waker {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant `VTABLE` is never used
[INFO] [stderr]   --> src/main.rs:33:7
[INFO] [stderr]    |
[INFO] [stderr] 33 | const VTABLE: RawWakerVTable =
[INFO] [stderr]    |       ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `vtable_clone` is never used
[INFO] [stderr]   --> src/main.rs:36:11
[INFO] [stderr]    |
[INFO] [stderr] 36 | unsafe fn vtable_clone(ptr: *const ()) -> RawWaker {
[INFO] [stderr]    |           ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `vtable_wake` is never used
[INFO] [stderr]   --> src/main.rs:41:11
[INFO] [stderr]    |
[INFO] [stderr] 41 | unsafe fn vtable_wake(_ptr: *const ()) {
[INFO] [stderr]    |           ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `vtable_wake_by_ref` is never used
[INFO] [stderr]   --> src/main.rs:45:11
[INFO] [stderr]    |
[INFO] [stderr] 45 | unsafe fn vtable_wake_by_ref(_ptr: *const ()) {
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `vtable_drop` is never used
[INFO] [stderr]   --> src/main.rs:49:11
[INFO] [stderr]    |
[INFO] [stderr] 49 | unsafe fn vtable_drop(_ptr: *const ()) {
[INFO] [stderr]    |           ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `hw4` (bin "hw4" test) generated 7 warnings (run `cargo fix --bin "hw4" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/hw4-61621fdd45b60131)
[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" "e9054ea246e33364a68378d8147d5d72f668e65461436bae0a5cb27cc90c4c45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9054ea246e33364a68378d8147d5d72f668e65461436bae0a5cb27cc90c4c45", kill_on_drop: false }`
[INFO] [stdout] e9054ea246e33364a68378d8147d5d72f668e65461436bae0a5cb27cc90c4c45