[INFO] cloning repository https://github.com/stormckey/advanced_rust_1
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stormckey/advanced_rust_1" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstormckey%2Fadvanced_rust_1", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstormckey%2Fadvanced_rust_1'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d3c624c186fb31af0c964e129750cda5da95aab4
[INFO] checking stormckey/advanced_rust_1 against master#accc516128b21e960b1a7af45393e9acdd184890 for pr-122501
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstormckey%2Fadvanced_rust_1" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stormckey/advanced_rust_1 on toolchain accc516128b21e960b1a7af45393e9acdd184890
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+accc516128b21e960b1a7af45393e9acdd184890" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/stormckey/advanced_rust_1
[INFO] finished tweaking git repo https://github.com/stormckey/advanced_rust_1
[INFO] tweaked toml for git repo https://github.com/stormckey/advanced_rust_1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/stormckey/advanced_rust_1 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" "+accc516128b21e960b1a7af45393e9acdd184890" "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 stormckey/advanced_rust_1 against try#32f93a5733992b29f321831b7e26c1f7d7205013 for pr-122501
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstormckey%2Fadvanced_rust_1" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stormckey/advanced_rust_1 on toolchain 32f93a5733992b29f321831b7e26c1f7d7205013
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+32f93a5733992b29f321831b7e26c1f7d7205013" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/stormckey/advanced_rust_1
[INFO] finished tweaking git repo https://github.com/stormckey/advanced_rust_1
[INFO] tweaked toml for git repo https://github.com/stormckey/advanced_rust_1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/stormckey/advanced_rust_1 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" "+32f93a5733992b29f321831b7e26c1f7d7205013" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+32f93a5733992b29f321831b7e26c1f7d7205013" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 476384a91fd791e04173ee88efcfbca73ba5fbc0dd261aadc8edd5ad3659f93f
[INFO] running `Command { std: "docker" "start" "-a" "476384a91fd791e04173ee88efcfbca73ba5fbc0dd261aadc8edd5ad3659f93f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "476384a91fd791e04173ee88efcfbca73ba5fbc0dd261aadc8edd5ad3659f93f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "476384a91fd791e04173ee88efcfbca73ba5fbc0dd261aadc8edd5ad3659f93f", kill_on_drop: false }`
[INFO] [stdout] 476384a91fd791e04173ee88efcfbca73ba5fbc0dd261aadc8edd5ad3659f93f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+32f93a5733992b29f321831b7e26c1f7d7205013" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c4d66d44972a5c5c9d8bb43d822dadeb45ce051b745453315e9a4a62bb917f0d
[INFO] running `Command { std: "docker" "start" "-a" "c4d66d44972a5c5c9d8bb43d822dadeb45ce051b745453315e9a4a62bb917f0d", kill_on_drop: false }`
[INFO] [stderr]     Checking advanced_rust_1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Buffer` is never constructed
[INFO] [stdout]  --> src/main.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Buffer<T: std::ops::Add<Output = T>>{
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `sum` are never used
[INFO] [stdout]   --> src/main.rs:9:12
[INFO] [stdout]    |
[INFO] [stdout] 5  | / impl<T> Buffer<T>
[INFO] [stdout] 6  | | where
[INFO] [stdout] 7  | |     T: std::ops::Add<Output = T> + Default + Copy,
[INFO] [stdout]    | |__________________________________________________- associated items in this implementation
[INFO] [stdout] 8  |   {
[INFO] [stdout] 9  |       pub fn new() ->Buffer<T>{
[INFO] [stdout]    |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 |       pub fn sum(&self) -> T{
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compare_string` is never used
[INFO] [stdout]   --> src/main.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn compare_string(a:&str, b:&str) -> bool{
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "c4d66d44972a5c5c9d8bb43d822dadeb45ce051b745453315e9a4a62bb917f0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4d66d44972a5c5c9d8bb43d822dadeb45ce051b745453315e9a4a62bb917f0d", kill_on_drop: false }`
[INFO] [stdout] c4d66d44972a5c5c9d8bb43d822dadeb45ce051b745453315e9a4a62bb917f0d