[INFO] cloning repository https://github.com/kletska/ACS-HW-5
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kletska/ACS-HW-5" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkletska%2FACS-HW-5", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkletska%2FACS-HW-5'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 63fbc5f2ce9b4cb131b265071ea98536ddaa5dd9
[INFO] testing kletska/ACS-HW-5 against try#33835004928d3bf65db4d4712e1330766263b0bd for pr-155739-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkletska%2FACS-HW-5" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kletska/ACS-HW-5
[INFO] finished tweaking git repo https://github.com/kletska/ACS-HW-5
[INFO] tweaked toml for git repo https://github.com/kletska/ACS-HW-5 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kletska/ACS-HW-5 on toolchain 33835004928d3bf65db4d4712e1330766263b0bd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kletska/ACS-HW-5 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" "+33835004928d3bf65db4d4712e1330766263b0bd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] testing kletska/ACS-HW-5 against try#33835004928d3bf65db4d4712e1330766263b0bd for pr-155739-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkletska%2FACS-HW-5" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kletska/ACS-HW-5
[INFO] finished tweaking git repo https://github.com/kletska/ACS-HW-5
[INFO] tweaked toml for git repo https://github.com/kletska/ACS-HW-5 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kletska/ACS-HW-5 on toolchain 33835004928d3bf65db4d4712e1330766263b0bd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kletska/ACS-HW-5 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" "+33835004928d3bf65db4d4712e1330766263b0bd" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ppv-lite86 v0.2.15
[INFO] [stderr]   Downloaded libc v0.2.111
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 686cd6b9b5e0635049a31183b8828a6797ee078afbd035679121ba858c59e5b8
[INFO] running `Command { std: "docker" "start" "-a" "686cd6b9b5e0635049a31183b8828a6797ee078afbd035679121ba858c59e5b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "686cd6b9b5e0635049a31183b8828a6797ee078afbd035679121ba858c59e5b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "686cd6b9b5e0635049a31183b8828a6797ee078afbd035679121ba858c59e5b8", kill_on_drop: false }`
[INFO] [stdout] 686cd6b9b5e0635049a31183b8828a6797ee078afbd035679121ba858c59e5b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "+33835004928d3bf65db4d4712e1330766263b0bd" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 34e86f1c2a0ca3f220b3582a1f4e85aef8d45d4a816acfe258073b9515ca0a1a
[INFO] running `Command { std: "docker" "start" "-a" "34e86f1c2a0ca3f220b3582a1f4e85aef8d45d4a816acfe258073b9515ca0a1a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.111
[INFO] [stderr]    Compiling ppv-lite86 v0.2.15
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling ACS-HW-5 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `next` is never read
[INFO] [stdout]   --> src/programmer.rs:56:20
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let mut next = None;
[INFO] [stdout]    |                    ^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 68 |             next = Some(new_next);
[INFO] [stdout]    |             ---- `next` is overwritten here before the previous value is read
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.86s
[INFO] running `Command { std: "docker" "inspect" "34e86f1c2a0ca3f220b3582a1f4e85aef8d45d4a816acfe258073b9515ca0a1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34e86f1c2a0ca3f220b3582a1f4e85aef8d45d4a816acfe258073b9515ca0a1a", kill_on_drop: false }`
[INFO] [stdout] 34e86f1c2a0ca3f220b3582a1f4e85aef8d45d4a816acfe258073b9515ca0a1a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 820af433695d7400a2bc7304f16cf60dfc3510037bbc8a596c3640038c72a978
[INFO] running `Command { std: "docker" "start" "-a" "820af433695d7400a2bc7304f16cf60dfc3510037bbc8a596c3640038c72a978", kill_on_drop: false }`
[INFO] [stderr]    Compiling ACS-HW-5 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `next` is never read
[INFO] [stdout]   --> src/programmer.rs:56:20
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let mut next = None;
[INFO] [stdout]    |                    ^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 68 |             next = Some(new_next);
[INFO] [stdout]    |             ---- `next` is overwritten here before the previous value is read
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `Command { std: "docker" "inspect" "820af433695d7400a2bc7304f16cf60dfc3510037bbc8a596c3640038c72a978", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "820af433695d7400a2bc7304f16cf60dfc3510037bbc8a596c3640038c72a978", kill_on_drop: false }`
[INFO] [stdout] 820af433695d7400a2bc7304f16cf60dfc3510037bbc8a596c3640038c72a978
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ce17e638268f6f97bc82514ee854a87eae652dd470917a69fdd4a746f145c01e
[INFO] running `Command { std: "docker" "start" "-a" "ce17e638268f6f97bc82514ee854a87eae652dd470917a69fdd4a746f145c01e", kill_on_drop: false }`
[INFO] [stderr] warning: value assigned to `next` is never read
[INFO] [stderr]   --> src/programmer.rs:56:20
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let mut next = None;
[INFO] [stderr]    |                    ^^^^ this value is reassigned later and never used
[INFO] [stderr] ...
[INFO] [stderr] 68 |             next = Some(new_next);
[INFO] [stderr]    |             ---- `next` is overwritten here before the previous value is read
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `ACS-HW-5` (bin "ACS-HW-5" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/ACS_HW_5-47d1d1990034338b)
[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" "ce17e638268f6f97bc82514ee854a87eae652dd470917a69fdd4a746f145c01e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce17e638268f6f97bc82514ee854a87eae652dd470917a69fdd4a746f145c01e", kill_on_drop: false }`
[INFO] [stdout] ce17e638268f6f97bc82514ee854a87eae652dd470917a69fdd4a746f145c01e