[INFO] cloning repository https://github.com/mannerism/rustIntro
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mannerism/rustIntro" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmannerism%2FrustIntro", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmannerism%2FrustIntro'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 89aad92614ef1cca1b79e42253947128c6d681c5
[INFO] checking mannerism/rustIntro against try#d534db0721b23cf977073bf4cd306dbf501e6b4d for pr-138499
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmannerism%2FrustIntro" "/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/mannerism/rustIntro on toolchain d534db0721b23cf977073bf4cd306dbf501e6b4d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d534db0721b23cf977073bf4cd306dbf501e6b4d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mannerism/rustIntro
[INFO] finished tweaking git repo https://github.com/mannerism/rustIntro
[INFO] tweaked toml for git repo https://github.com/mannerism/rustIntro written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mannerism/rustIntro 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" "+d534db0721b23cf977073bf4cd306dbf501e6b4d" "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-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+d534db0721b23cf977073bf4cd306dbf501e6b4d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 614aabd95b8e4c01af368e7b0face83d8a66c2343657b1f85598abe8591e4a92
[INFO] running `Command { std: "docker" "start" "-a" "614aabd95b8e4c01af368e7b0face83d8a66c2343657b1f85598abe8591e4a92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "614aabd95b8e4c01af368e7b0face83d8a66c2343657b1f85598abe8591e4a92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "614aabd95b8e4c01af368e7b0face83d8a66c2343657b1f85598abe8591e4a92", kill_on_drop: false }`
[INFO] [stdout] 614aabd95b8e4c01af368e7b0face83d8a66c2343657b1f85598abe8591e4a92
[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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+d534db0721b23cf977073bf4cd306dbf501e6b4d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3b7262d24b1e1bcc0edc265622c25fc04a7eb411e285bd6de30eb18da7e90091
[INFO] running `Command { std: "docker" "start" "-a" "3b7262d24b1e1bcc0edc265622c25fc04a7eb411e285bd6de30eb18da7e90091", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_sandbox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `a` and `b` are never read
[INFO] [stdout]  --> src/struct_ownership.rs:6:3
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct DougsStruct {
[INFO] [stdout]   |        ----------- fields in this struct
[INFO] [stdout] 6 |   a: i32,
[INFO] [stdout]   |   ^
[INFO] [stdout] 7 |   b: f64,
[INFO] [stdout]   |   ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `DougsStruct` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a` and `b` are never read
[INFO] [stdout]  --> src/struct_ownership.rs:6:3
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct DougsStruct {
[INFO] [stdout]   |        ----------- fields in this struct
[INFO] [stdout] 6 |   a: i32,
[INFO] [stdout]   |   ^
[INFO] [stdout] 7 |   b: f64,
[INFO] [stdout]   |   ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `DougsStruct` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] running `Command { std: "docker" "inspect" "3b7262d24b1e1bcc0edc265622c25fc04a7eb411e285bd6de30eb18da7e90091", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b7262d24b1e1bcc0edc265622c25fc04a7eb411e285bd6de30eb18da7e90091", kill_on_drop: false }`
[INFO] [stdout] 3b7262d24b1e1bcc0edc265622c25fc04a7eb411e285bd6de30eb18da7e90091