[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#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPM25000%2Frust_hw4" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/PM25000/rust_hw4 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "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-1-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 2d7cdd71d5bea9197df2bb0a2074c6807c29ffe9d76905c927c412ab4928c0be [INFO] running `Command { std: "docker" "start" "-a" "2d7cdd71d5bea9197df2bb0a2074c6807c29ffe9d76905c927c412ab4928c0be", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "2d7cdd71d5bea9197df2bb0a2074c6807c29ffe9d76905c927c412ab4928c0be", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2d7cdd71d5bea9197df2bb0a2074c6807c29ffe9d76905c927c412ab4928c0be", kill_on_drop: false }` [INFO] [stdout] 2d7cdd71d5bea9197df2bb0a2074c6807c29ffe9d76905c927c412ab4928c0be [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 542e358439677dea9e8cb1902ee0b8f91de84e93ff927e9bfbc36e34bbb19a1b [INFO] running `Command { std: "docker" "start" "-a" "542e358439677dea9e8cb1902ee0b8f91de84e93ff927e9bfbc36e34bbb19a1b", kill_on_drop: false }` [INFO] [stderr] Checking futures-io v0.3.28 [INFO] [stderr] Checking memchr v2.6.3 [INFO] [stderr] Compiling crossbeam-utils v0.8.16 [INFO] [stderr] Compiling proc-macro2 v1.0.66 [INFO] [stderr] Checking event-listener v2.5.3 [INFO] [stderr] Compiling unicode-ident v1.0.11 [INFO] [stderr] Checking value-bag v1.4.1 [INFO] [stderr] Checking fastrand v1.9.0 [INFO] [stderr] Checking parking v2.1.0 [INFO] [stderr] Compiling io-lifetimes v1.0.11 [INFO] [stderr] Checking waker-fn v1.1.0 [INFO] [stderr] Checking async-lock v2.8.0 [INFO] [stderr] Checking log v0.4.20 [INFO] [stderr] Compiling polling v2.8.0 [INFO] [stderr] Compiling rustix v0.37.23 [INFO] [stderr] Compiling futures-channel v0.3.28 [INFO] [stderr] Compiling futures-task v0.3.28 [INFO] [stderr] Compiling async-io v1.13.0 [INFO] [stderr] Checking futures-sink v0.3.28 [INFO] [stderr] Compiling futures-util v0.3.28 [INFO] [stderr] Checking concurrent-queue v2.2.0 [INFO] [stderr] Checking linux-raw-sys v0.3.8 [INFO] [stderr] Checking futures-lite v1.13.0 [INFO] [stderr] Checking async-task v4.4.0 [INFO] [stderr] Checking async-channel v1.9.0 [INFO] [stderr] Checking atomic-waker v1.1.1 [INFO] [stderr] Checking kv-log-macro v1.0.7 [INFO] [stderr] Compiling quote v1.0.33 [INFO] [stderr] Checking tokio v1.32.0 [INFO] [stderr] Checking scoped-tls v1.0.1 [INFO] [stderr] Compiling syn v2.0.31 [INFO] [stderr] Checking blocking v1.3.1 [INFO] [stderr] Checking async-executor v1.5.1 [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`, `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`, `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 19.89s [INFO] running `Command { std: "docker" "inspect" "542e358439677dea9e8cb1902ee0b8f91de84e93ff927e9bfbc36e34bbb19a1b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "542e358439677dea9e8cb1902ee0b8f91de84e93ff927e9bfbc36e34bbb19a1b", kill_on_drop: false }` [INFO] [stdout] 542e358439677dea9e8cb1902ee0b8f91de84e93ff927e9bfbc36e34bbb19a1b