[INFO] cloning repository https://github.com/tsunghsiang/The-Law-of-Demeter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tsunghsiang/The-Law-of-Demeter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftsunghsiang%2FThe-Law-of-Demeter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftsunghsiang%2FThe-Law-of-Demeter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d9b08fd201bf1d2e2a2de03c94d231a1c986f6ee
[INFO] checking tsunghsiang/The-Law-of-Demeter against master#96df4943409564a187894018f15f795426dc2e1f for pr-118968
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftsunghsiang%2FThe-Law-of-Demeter" "/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/tsunghsiang/The-Law-of-Demeter on toolchain 96df4943409564a187894018f15f795426dc2e1f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+96df4943409564a187894018f15f795426dc2e1f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tsunghsiang/The-Law-of-Demeter
[INFO] finished tweaking git repo https://github.com/tsunghsiang/The-Law-of-Demeter
[INFO] tweaked toml for git repo https://github.com/tsunghsiang/The-Law-of-Demeter written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/tsunghsiang/The-Law-of-Demeter 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" "+96df4943409564a187894018f15f795426dc2e1f" "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 tsunghsiang/The-Law-of-Demeter against try#7e4f74fb8736fea8f455bb6e094122965ae8f4cd for pr-118968
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftsunghsiang%2FThe-Law-of-Demeter" "/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/tsunghsiang/The-Law-of-Demeter on toolchain 7e4f74fb8736fea8f455bb6e094122965ae8f4cd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7e4f74fb8736fea8f455bb6e094122965ae8f4cd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tsunghsiang/The-Law-of-Demeter
[INFO] finished tweaking git repo https://github.com/tsunghsiang/The-Law-of-Demeter
[INFO] tweaked toml for git repo https://github.com/tsunghsiang/The-Law-of-Demeter written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/tsunghsiang/The-Law-of-Demeter 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" "+7e4f74fb8736fea8f455bb6e094122965ae8f4cd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded contracts v0.6.3
[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" "+7e4f74fb8736fea8f455bb6e094122965ae8f4cd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] db8ddcdb94de6f90c4cdc3963488a5ded07e98e72b844b950eb12ffa904b5f88
[INFO] running `Command { std: "docker" "start" "-a" "db8ddcdb94de6f90c4cdc3963488a5ded07e98e72b844b950eb12ffa904b5f88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db8ddcdb94de6f90c4cdc3963488a5ded07e98e72b844b950eb12ffa904b5f88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db8ddcdb94de6f90c4cdc3963488a5ded07e98e72b844b950eb12ffa904b5f88", kill_on_drop: false }`
[INFO] [stdout] db8ddcdb94de6f90c4cdc3963488a5ded07e98e72b844b950eb12ffa904b5f88
[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" "+7e4f74fb8736fea8f455bb6e094122965ae8f4cd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5e15b87fe14b6c9186a954fb09488791bf52c510283828934c7c1b3e174f0225
[INFO] running `Command { std: "docker" "start" "-a" "5e15b87fe14b6c9186a954fb09488791bf52c510283828934c7c1b3e174f0225", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.38
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling syn v1.0.94
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling contracts v0.6.3
[INFO] [stderr]     Checking demeter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `ensures`, `invariant`, `requires`
[INFO] [stdout]  --> src/paperboy.rs:2:17
[INFO] [stdout]   |
[INFO] [stdout] 2 | use contracts::{requires, ensures, invariant};
[INFO] [stdout]   |                 ^^^^^^^^  ^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ensures`, `invariant`, `requires`
[INFO] [stdout]  --> src/paperboy.rs:2:17
[INFO] [stdout]   |
[INFO] [stdout] 2 | use contracts::{requires, ensures, invariant};
[INFO] [stdout]   |                 ^^^^^^^^  ^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `first_name` and `last_name` are never read
[INFO] [stdout]  --> src/paperboy.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Paperboy {
[INFO] [stdout]   |            -------- fields in this struct
[INFO] [stdout] 5 |     first_name: String,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 6 |     last_name: String,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_first_name` and `get_last_name` are never used
[INFO] [stdout]   --> src/paperboy.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Paperboy {
[INFO] [stdout]    | ------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn get_first_name(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn get_last_name(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `first_name` and `last_name` are never read
[INFO] [stdout]  --> src/paperboy.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Paperboy {
[INFO] [stdout]   |            -------- fields in this struct
[INFO] [stdout] 5 |     first_name: String,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 6 |     last_name: String,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_first_name` and `get_last_name` are never used
[INFO] [stdout]   --> src/paperboy.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Paperboy {
[INFO] [stdout]    | ------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn get_first_name(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn get_last_name(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.08s
[INFO] running `Command { std: "docker" "inspect" "5e15b87fe14b6c9186a954fb09488791bf52c510283828934c7c1b3e174f0225", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e15b87fe14b6c9186a954fb09488791bf52c510283828934c7c1b3e174f0225", kill_on_drop: false }`
[INFO] [stdout] 5e15b87fe14b6c9186a954fb09488791bf52c510283828934c7c1b3e174f0225