[INFO] cloning repository https://github.com/ndtai772/networking_challenges
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ndtai772/networking_challenges" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fndtai772%2Fnetworking_challenges", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fndtai772%2Fnetworking_challenges'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e0e04e3cf9824ba12b2192f485d8e8bd2d7a3557
[INFO] checking ndtai772/networking_challenges against master#d97bb195bf7b84815622b235cb51171c1b8f7e51 for pr-117905
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fndtai772%2Fnetworking_challenges" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ndtai772/networking_challenges on toolchain d97bb195bf7b84815622b235cb51171c1b8f7e51
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d97bb195bf7b84815622b235cb51171c1b8f7e51" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ndtai772/networking_challenges
[INFO] finished tweaking git repo https://github.com/ndtai772/networking_challenges
[INFO] tweaked toml for git repo https://github.com/ndtai772/networking_challenges written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ndtai772/networking_challenges 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" "+d97bb195bf7b84815622b235cb51171c1b8f7e51" "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
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking ndtai772/networking_challenges against try#1930f260edd7e614aa013a0665aa5cfd0ada0501 for pr-117905
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fndtai772%2Fnetworking_challenges" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ndtai772/networking_challenges on toolchain 1930f260edd7e614aa013a0665aa5cfd0ada0501
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1930f260edd7e614aa013a0665aa5cfd0ada0501" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ndtai772/networking_challenges
[INFO] finished tweaking git repo https://github.com/ndtai772/networking_challenges
[INFO] tweaked toml for git repo https://github.com/ndtai772/networking_challenges written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ndtai772/networking_challenges 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" "+1930f260edd7e614aa013a0665aa5cfd0ada0501" "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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1930f260edd7e614aa013a0665aa5cfd0ada0501" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3a3e40e009571da68ce6bc9b5dcf5651c52013f13ecc6e59627a64e179b46d2c
[INFO] running `Command { std: "docker" "start" "-a" "3a3e40e009571da68ce6bc9b5dcf5651c52013f13ecc6e59627a64e179b46d2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a3e40e009571da68ce6bc9b5dcf5651c52013f13ecc6e59627a64e179b46d2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a3e40e009571da68ce6bc9b5dcf5651c52013f13ecc6e59627a64e179b46d2c", kill_on_drop: false }`
[INFO] [stdout] 3a3e40e009571da68ce6bc9b5dcf5651c52013f13ecc6e59627a64e179b46d2c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1930f260edd7e614aa013a0665aa5cfd0ada0501" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] afc2ad4d9e6a4482aacb2fb0f2c43fb8ec6a056de49dcaaf52e41884f1e7decc
[INFO] running `Command { std: "docker" "start" "-a" "afc2ad4d9e6a4482aacb2fb0f2c43fb8ec6a056de49dcaaf52e41884f1e7decc", kill_on_drop: false }`
[INFO] [stderr]     Checking networking_challenges v1.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/lib.rs:13:14
[INFO] [stdout]    |
[INFO] [stdout] 13 |           bytes
[INFO] [stdout]    |  ______________^
[INFO] [stdout] 14 | |             .clone()
[INFO] [stdout]    | |____________________^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `[u8]` does not implement `Clone`, so calling `clone` on `&[u8]` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/lib.rs:13:14
[INFO] [stdout]    |
[INFO] [stdout] 13 |           bytes
[INFO] [stdout]    |  ______________^
[INFO] [stdout] 14 | |             .clone()
[INFO] [stdout]    | |____________________^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `[u8]` does not implement `Clone`, so calling `clone` on `&[u8]` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "afc2ad4d9e6a4482aacb2fb0f2c43fb8ec6a056de49dcaaf52e41884f1e7decc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afc2ad4d9e6a4482aacb2fb0f2c43fb8ec6a056de49dcaaf52e41884f1e7decc", kill_on_drop: false }`
[INFO] [stdout] afc2ad4d9e6a4482aacb2fb0f2c43fb8ec6a056de49dcaaf52e41884f1e7decc