[INFO] cloning repository https://github.com/revan730/op-lab-8-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/revan730/op-lab-8-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frevan730%2Fop-lab-8-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frevan730%2Fop-lab-8-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c52fef50a66d5d910b1dc2484030f25075f0ac71
[INFO] checking revan730/op-lab-8-rust against try#654bc80249a2b2ba8bd16392b5829d87ed96c92d for pr-136458
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frevan730%2Fop-lab-8-rust" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] error: copy-fd: write returned: No space left on device
[INFO] [stderr] fatal: cannot copy '/usr/share/git-core/templates/hooks/prepare-commit-msg.sample' to '/workspace/builds/worker-3-tc2/source/.git/hooks/prepare-commit-msg.sample': No space left on device
[INFO] checking revan730/op-lab-8-rust against try#654bc80249a2b2ba8bd16392b5829d87ed96c92d for pr-136458
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frevan730%2Fop-lab-8-rust" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] error: failed to write new configuration file /workspace/builds/worker-3-tc2/source/.git/config.lock
[INFO] [stderr] fatal: could not set 'core.filemode' to 'true'
[INFO] checking revan730/op-lab-8-rust against try#654bc80249a2b2ba8bd16392b5829d87ed96c92d for pr-136458
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frevan730%2Fop-lab-8-rust" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] [stderr] fatal: update_ref failed for ref 'HEAD': cannot update the ref 'refs/heads/master': unable to append to '/workspace/builds/worker-3-tc2/source/.git/logs/refs/heads/master': No space left on device
[INFO] checking revan730/op-lab-8-rust against try#654bc80249a2b2ba8bd16392b5829d87ed96c92d for pr-136458
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frevan730%2Fop-lab-8-rust" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/revan730/op-lab-8-rust on toolchain 654bc80249a2b2ba8bd16392b5829d87ed96c92d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+654bc80249a2b2ba8bd16392b5829d87ed96c92d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/revan730/op-lab-8-rust
[INFO] finished tweaking git repo https://github.com/revan730/op-lab-8-rust
[INFO] tweaked toml for git repo https://github.com/revan730/op-lab-8-rust written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/revan730/op-lab-8-rust 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" "+654bc80249a2b2ba8bd16392b5829d87ed96c92d" "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-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+654bc80249a2b2ba8bd16392b5829d87ed96c92d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4993dafd529b9eff2f06a216caba1f64c0ff2f012397e1ae2229ea034ff99016
[INFO] running `Command { std: "docker" "start" "-a" "4993dafd529b9eff2f06a216caba1f64c0ff2f012397e1ae2229ea034ff99016", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4993dafd529b9eff2f06a216caba1f64c0ff2f012397e1ae2229ea034ff99016", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4993dafd529b9eff2f06a216caba1f64c0ff2f012397e1ae2229ea034ff99016", kill_on_drop: false }`
[INFO] [stdout] 4993dafd529b9eff2f06a216caba1f64c0ff2f012397e1ae2229ea034ff99016
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+654bc80249a2b2ba8bd16392b5829d87ed96c92d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f1311bc06377b89f34032566471d3ff5b2d2acaed77b1fb594745330c52d1b87
[INFO] running `Command { std: "docker" "start" "-a" "f1311bc06377b89f34032566471d3ff5b2d2acaed77b1fb594745330c52d1b87", kill_on_drop: false }`
[INFO] [stderr]     Checking op_lab_8_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |         output_file.write_fmt(format_args!("{}\n", longest_word));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 91 |         let _ = output_file.write_fmt(format_args!("{}\n", longest_word));
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |         output_file.write_fmt(format_args!("{}\n", longest_word));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 91 |         let _ = output_file.write_fmt(format_args!("{}\n", longest_word));
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "f1311bc06377b89f34032566471d3ff5b2d2acaed77b1fb594745330c52d1b87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1311bc06377b89f34032566471d3ff5b2d2acaed77b1fb594745330c52d1b87", kill_on_drop: false }`
[INFO] [stdout] f1311bc06377b89f34032566471d3ff5b2d2acaed77b1fb594745330c52d1b87