[INFO] cloning repository https://github.com/TAK848/rust-helloworld
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TAK848/rust-helloworld" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTAK848%2Frust-helloworld", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTAK848%2Frust-helloworld'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e6514a8faab76e7ee0edbf3fb6144da414c44bea
[INFO] checking TAK848/rust-helloworld against master#2886b36df4a646dd8d82fb65bf0c9d8d96c1f71a for pr-145113
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTAK848%2Frust-helloworld" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/TAK848/rust-helloworld
[INFO] finished tweaking git repo https://github.com/TAK848/rust-helloworld
[INFO] tweaked toml for git repo https://github.com/TAK848/rust-helloworld written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/TAK848/rust-helloworld on toolchain 2886b36df4a646dd8d82fb65bf0c9d8d96c1f71a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2886b36df4a646dd8d82fb65bf0c9d8d96c1f71a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/TAK848/rust-helloworld 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" "+2886b36df4a646dd8d82fb65bf0c9d8d96c1f71a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+2886b36df4a646dd8d82fb65bf0c9d8d96c1f71a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fc92da0b04df442ae6c2537ae3238bafc49dc40e622f5493cdaa5987a711761e
[INFO] running `Command { std: "docker" "start" "-a" "fc92da0b04df442ae6c2537ae3238bafc49dc40e622f5493cdaa5987a711761e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc92da0b04df442ae6c2537ae3238bafc49dc40e622f5493cdaa5987a711761e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc92da0b04df442ae6c2537ae3238bafc49dc40e622f5493cdaa5987a711761e", kill_on_drop: false }`
[INFO] [stdout] fc92da0b04df442ae6c2537ae3238bafc49dc40e622f5493cdaa5987a711761e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+2886b36df4a646dd8d82fb65bf0c9d8d96c1f71a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac5364488443992a921299f177b38ab3933fbf2ef5e362002a37a37f23a7bde2
[INFO] running `Command { std: "docker" "start" "-a" "ac5364488443992a921299f177b38ab3933fbf2ef5e362002a37a37f23a7bde2", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-lesson v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]  --> src/unit_test.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Rectangle {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `compare_area` is never used
[INFO] [stdout]  --> src/unit_test.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Rectangle {
[INFO] [stdout]   | -------------- method in this implementation
[INFO] [stdout] 6 |     fn compare_area(&self, other: &Rectangle) -> bool {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `double_value` is never used
[INFO] [stdout]   --> src/unit_test.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn double_value(a: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greeting` is never used
[INFO] [stdout]   --> src/unit_test.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn greeting(name: &str) -> String {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] running `Command { std: "docker" "inspect" "ac5364488443992a921299f177b38ab3933fbf2ef5e362002a37a37f23a7bde2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac5364488443992a921299f177b38ab3933fbf2ef5e362002a37a37f23a7bde2", kill_on_drop: false }`
[INFO] [stdout] ac5364488443992a921299f177b38ab3933fbf2ef5e362002a37a37f23a7bde2