[INFO] cloning repository https://github.com/leonTech254/LearnRustByExamples
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/leonTech254/LearnRustByExamples" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FleonTech254%2FLearnRustByExamples", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FleonTech254%2FLearnRustByExamples'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3d80848cdc58f088ed6946a1e6c138c47652c2a2
[INFO] checking leonTech254/LearnRustByExamples against try#0269aeccce4fd29ce9ad0ebd47a62e584d7e25ef for pr-147859
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FleonTech254%2FLearnRustByExamples" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/leonTech254/LearnRustByExamples
[INFO] finished tweaking git repo https://github.com/leonTech254/LearnRustByExamples
[INFO] tweaked toml for git repo https://github.com/leonTech254/LearnRustByExamples written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/leonTech254/LearnRustByExamples on toolchain 0269aeccce4fd29ce9ad0ebd47a62e584d7e25ef
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0269aeccce4fd29ce9ad0ebd47a62e584d7e25ef" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/leonTech254/LearnRustByExamples 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" "+0269aeccce4fd29ce9ad0ebd47a62e584d7e25ef" "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]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_core v0.10.0-rc-3
[INFO] [stderr]   Downloaded chacha20 v0.10.0-rc.6
[INFO] [stderr]   Downloaded getrandom v0.4.0-rc.0
[INFO] [stderr]   Downloaded rand v0.10.0-rc.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+0269aeccce4fd29ce9ad0ebd47a62e584d7e25ef" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 411ebf773ae298adc0d0305f1bff710fcd7e4c93e6c29b5a7154da6fa9363eb7
[INFO] running `Command { std: "docker" "start" "-a" "411ebf773ae298adc0d0305f1bff710fcd7e4c93e6c29b5a7154da6fa9363eb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "411ebf773ae298adc0d0305f1bff710fcd7e4c93e6c29b5a7154da6fa9363eb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "411ebf773ae298adc0d0305f1bff710fcd7e4c93e6c29b5a7154da6fa9363eb7", kill_on_drop: false }`
[INFO] [stdout] 411ebf773ae298adc0d0305f1bff710fcd7e4c93e6c29b5a7154da6fa9363eb7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+0269aeccce4fd29ce9ad0ebd47a62e584d7e25ef" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b64775dcb2f83250bb726288f3cb5bc98a16625695800348bf534b6da5637be4
[INFO] running `Command { std: "docker" "start" "-a" "b64775dcb2f83250bb726288f3cb5bc98a16625695800348bf534b6da5637be4", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.10.0-rc-3
[INFO] [stderr]    Compiling getrandom v0.4.0-rc.0
[INFO] [stderr]     Checking chacha20 v0.10.0-rc.6
[INFO] [stderr]     Checking rand v0.10.0-rc.6
[INFO] [stderr]     Checking LearnRust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `age` is never read
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Person {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] 5 |     name: String,
[INFO] [stdout] 6 |     age: i32,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Person` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `age` is never read
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Person {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] 5 |     name: String,
[INFO] [stdout] 6 |     age: i32,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Person` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.50s
[INFO] running `Command { std: "docker" "inspect" "b64775dcb2f83250bb726288f3cb5bc98a16625695800348bf534b6da5637be4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b64775dcb2f83250bb726288f3cb5bc98a16625695800348bf534b6da5637be4", kill_on_drop: false }`
[INFO] [stdout] b64775dcb2f83250bb726288f3cb5bc98a16625695800348bf534b6da5637be4