[INFO] cloning repository https://github.com/ksakiyama/my_first_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ksakiyama/my_first_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fksakiyama%2Fmy_first_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fksakiyama%2Fmy_first_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 379fa38916fc3eafbc7031ba21b1cbab75e1257e
[INFO] checking ksakiyama/my_first_rust against master#f00b02e6bbe63707503f058fb87cc3e2b25991ac for pr-125596
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fksakiyama%2Fmy_first_rust" "/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/ksakiyama/my_first_rust on toolchain f00b02e6bbe63707503f058fb87cc3e2b25991ac
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f00b02e6bbe63707503f058fb87cc3e2b25991ac" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ksakiyama/my_first_rust
[INFO] finished tweaking git repo https://github.com/ksakiyama/my_first_rust
[INFO] tweaked toml for git repo https://github.com/ksakiyama/my_first_rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ksakiyama/my_first_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" "+f00b02e6bbe63707503f058fb87cc3e2b25991ac" "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
[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 ksakiyama/my_first_rust against try#c57a122e6bc7d3e243f3b2a000b6916cb51ef149 for pr-125596
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fksakiyama%2Fmy_first_rust" "/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/ksakiyama/my_first_rust on toolchain c57a122e6bc7d3e243f3b2a000b6916cb51ef149
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c57a122e6bc7d3e243f3b2a000b6916cb51ef149" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ksakiyama/my_first_rust
[INFO] finished tweaking git repo https://github.com/ksakiyama/my_first_rust
[INFO] tweaked toml for git repo https://github.com/ksakiyama/my_first_rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ksakiyama/my_first_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" "+c57a122e6bc7d3e243f3b2a000b6916cb51ef149" "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] checking ksakiyama/my_first_rust against try#c57a122e6bc7d3e243f3b2a000b6916cb51ef149 for pr-125596
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fksakiyama%2Fmy_first_rust" "/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/ksakiyama/my_first_rust on toolchain c57a122e6bc7d3e243f3b2a000b6916cb51ef149
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c57a122e6bc7d3e243f3b2a000b6916cb51ef149" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ksakiyama/my_first_rust
[INFO] finished tweaking git repo https://github.com/ksakiyama/my_first_rust
[INFO] tweaked toml for git repo https://github.com/ksakiyama/my_first_rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ksakiyama/my_first_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" "+c57a122e6bc7d3e243f3b2a000b6916cb51ef149" "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]     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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+c57a122e6bc7d3e243f3b2a000b6916cb51ef149" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b5ca12c9fe0a48164f853494d607c9b2291b27830b3b96e10f7d65c092b5a110
[INFO] running `Command { std: "docker" "start" "-a" "b5ca12c9fe0a48164f853494d607c9b2291b27830b3b96e10f7d65c092b5a110", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b5ca12c9fe0a48164f853494d607c9b2291b27830b3b96e10f7d65c092b5a110", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5ca12c9fe0a48164f853494d607c9b2291b27830b3b96e10f7d65c092b5a110", kill_on_drop: false }`
[INFO] [stdout] b5ca12c9fe0a48164f853494d607c9b2291b27830b3b96e10f7d65c092b5a110
[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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+c57a122e6bc7d3e243f3b2a000b6916cb51ef149" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 799f1a05250b84e7a62141550cd31dd4a23f5c180ead4d9226a0ff00015855a7
[INFO] running `Command { std: "docker" "start" "-a" "799f1a05250b84e7a62141550cd31dd4a23f5c180ead4d9226a0ff00015855a7", kill_on_drop: false }`
[INFO] [stderr]     Checking first_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `read_from_file` is never used
[INFO] [stdout]    --> src/main.rs:101:4
[INFO] [stdout]     |
[INFO] [stdout] 101 | fn read_from_file() -> Vec<Vec<i32>> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_from_file` is never used
[INFO] [stdout]    --> src/main.rs:101:4
[INFO] [stdout]     |
[INFO] [stdout] 101 | fn read_from_file() -> Vec<Vec<i32>> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] running `Command { std: "docker" "inspect" "799f1a05250b84e7a62141550cd31dd4a23f5c180ead4d9226a0ff00015855a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "799f1a05250b84e7a62141550cd31dd4a23f5c180ead4d9226a0ff00015855a7", kill_on_drop: false }`
[INFO] [stdout] 799f1a05250b84e7a62141550cd31dd4a23f5c180ead4d9226a0ff00015855a7