[INFO] cloning repository https://github.com/ykafia/ruste_sandbox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ykafia/ruste_sandbox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fykafia%2Fruste_sandbox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fykafia%2Fruste_sandbox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3ffc93aad9763560c1830599d4dfa19e25127b87
[INFO] checking ykafia/ruste_sandbox against master#74c3f5a146860c94ff4d179fc3bfa34f879adf41 for pr-120248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fykafia%2Fruste_sandbox" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ykafia/ruste_sandbox on toolchain 74c3f5a146860c94ff4d179fc3bfa34f879adf41
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+74c3f5a146860c94ff4d179fc3bfa34f879adf41" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ykafia/ruste_sandbox
[INFO] finished tweaking git repo https://github.com/ykafia/ruste_sandbox
[INFO] tweaked toml for git repo https://github.com/ykafia/ruste_sandbox written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ykafia/ruste_sandbox 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" "+74c3f5a146860c94ff4d179fc3bfa34f879adf41" "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 ykafia/ruste_sandbox against try#13cae6066db2d5e6c9bb508caceec8d34ca49980 for pr-120248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fykafia%2Fruste_sandbox" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ykafia/ruste_sandbox on toolchain 13cae6066db2d5e6c9bb508caceec8d34ca49980
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+13cae6066db2d5e6c9bb508caceec8d34ca49980" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ykafia/ruste_sandbox
[INFO] finished tweaking git repo https://github.com/ykafia/ruste_sandbox
[INFO] tweaked toml for git repo https://github.com/ykafia/ruste_sandbox written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ykafia/ruste_sandbox 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" "+13cae6066db2d5e6c9bb508caceec8d34ca49980" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+13cae6066db2d5e6c9bb508caceec8d34ca49980" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 718740866a222f1d43b07e5c92925f512fced929bd2722df484bc1ca3eee69e8
[INFO] running `Command { std: "docker" "start" "-a" "718740866a222f1d43b07e5c92925f512fced929bd2722df484bc1ca3eee69e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "718740866a222f1d43b07e5c92925f512fced929bd2722df484bc1ca3eee69e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "718740866a222f1d43b07e5c92925f512fced929bd2722df484bc1ca3eee69e8", kill_on_drop: false }`
[INFO] [stdout] 718740866a222f1d43b07e5c92925f512fced929bd2722df484bc1ca3eee69e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+13cae6066db2d5e6c9bb508caceec8d34ca49980" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c6e6f405946a29242b1e1afad12b114877e8c53b6cbd1c74b5fcd59424fe381b
[INFO] running `Command { std: "docker" "start" "-a" "c6e6f405946a29242b1e1afad12b114877e8c53b6cbd1c74b5fcd59424fe381b", kill_on_drop: false }`
[INFO] [stderr]     Checking fixedbitset v0.1.9
[INFO] [stderr]     Checking petgraph v0.4.13
[INFO] [stderr]     Checking daggy v0.6.0
[INFO] [stderr]     Checking ruste v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `NodeIndex`, `WouldCycle`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     WouldCycle,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 4 |     NodeIndex
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `NodeIndex`, `WouldCycle`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     WouldCycle,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 4 |     NodeIndex
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Superman` is never constructed
[INFO] [stdout]   --> src/main.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct Superman;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Superman` is never constructed
[INFO] [stdout]   --> src/main.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct Superman;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.16s
[INFO] running `Command { std: "docker" "inspect" "c6e6f405946a29242b1e1afad12b114877e8c53b6cbd1c74b5fcd59424fe381b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6e6f405946a29242b1e1afad12b114877e8c53b6cbd1c74b5fcd59424fe381b", kill_on_drop: false }`
[INFO] [stdout] c6e6f405946a29242b1e1afad12b114877e8c53b6cbd1c74b5fcd59424fe381b