[INFO] cloning repository https://github.com/beard-programmer/rust_learn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/beard-programmer/rust_learn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbeard-programmer%2Frust_learn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbeard-programmer%2Frust_learn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b1815cc69dd984c2540ab170efeaa135cbf541fb
[INFO] checking beard-programmer/rust_learn against master#3350c1eb3fd8fe1bee1ed4c76944d707bd256876 for pr-140558
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbeard-programmer%2Frust_learn" "/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/beard-programmer/rust_learn on toolchain 3350c1eb3fd8fe1bee1ed4c76944d707bd256876
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/beard-programmer/rust_learn
[INFO] finished tweaking git repo https://github.com/beard-programmer/rust_learn
[INFO] tweaked toml for git repo https://github.com/beard-programmer/rust_learn written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/beard-programmer/rust_learn 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" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 66a4fcfeea2b4e89151d2aa02b9371863a3439ceab9ebf59431134b5588e7a13
[INFO] running `Command { std: "docker" "start" "-a" "66a4fcfeea2b4e89151d2aa02b9371863a3439ceab9ebf59431134b5588e7a13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "66a4fcfeea2b4e89151d2aa02b9371863a3439ceab9ebf59431134b5588e7a13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66a4fcfeea2b4e89151d2aa02b9371863a3439ceab9ebf59431134b5588e7a13", kill_on_drop: false }`
[INFO] [stdout] 66a4fcfeea2b4e89151d2aa02b9371863a3439ceab9ebf59431134b5588e7a13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d25f94eb58478ed1d20acf0d7dde08272694c79e0b4ab16880bd96afd04550fb
[INFO] running `Command { std: "docker" "start" "-a" "d25f94eb58478ed1d20acf0d7dde08272694c79e0b4ab16880bd96afd04550fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.138
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking binary_tree v0.1.0 (/opt/rustwide/workdir/binary_tree)
[INFO] [stderr]     Checking display_ownership v0.1.0 (/opt/rustwide/workdir/display_ownership)
[INFO] [stderr]     Checking rectangle v0.1.0 (/opt/rustwide/workdir/rectangle)
[INFO] [stdout] warning: trait `NodesCountable` is never used
[INFO] [stdout]   --> binary_tree/src/lib.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | trait NodesCountable {
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Gettable` is never used
[INFO] [stdout]   --> binary_tree/src/lib.rs:26:7
[INFO] [stdout]    |
[INFO] [stdout] 26 | trait Gettable<T, A> {
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rust_learn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> src/blog.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct RejectedPost {
[INFO] [stdout]    |            ------------ field in this struct
[INFO] [stdout] 15 |     content: String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> src/blog.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct RejectedPost {
[INFO] [stdout]    |            ------------ field in this struct
[INFO] [stdout] 15 |     content: String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.96s
[INFO] running `Command { std: "docker" "inspect" "d25f94eb58478ed1d20acf0d7dde08272694c79e0b4ab16880bd96afd04550fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d25f94eb58478ed1d20acf0d7dde08272694c79e0b4ab16880bd96afd04550fb", kill_on_drop: false }`
[INFO] [stdout] d25f94eb58478ed1d20acf0d7dde08272694c79e0b4ab16880bd96afd04550fb