[INFO] cloning repository https://github.com/mio256/rust_practice_tmp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mio256/rust_practice_tmp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmio256%2Frust_practice_tmp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmio256%2Frust_practice_tmp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 559fbc7e80f7a6232479995253e8287d870c8f9e
[INFO] checking mio256/rust_practice_tmp against master#e9182f195b8505c87c4bd055b9f6e114ccda0981 for pr-144098
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmio256%2Frust_practice_tmp" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] error: unable to create directory for '/workspace/builds/worker-2-tc1/source/.git/logs/refs/remotes/origin/HEAD': No such file or directory
[INFO] started tweaking git repo https://github.com/mio256/rust_practice_tmp
[INFO] finished tweaking git repo https://github.com/mio256/rust_practice_tmp
[INFO] tweaked toml for git repo https://github.com/mio256/rust_practice_tmp written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mio256/rust_practice_tmp on toolchain e9182f195b8505c87c4bd055b9f6e114ccda0981
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e9182f195b8505c87c4bd055b9f6e114ccda0981" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mio256/rust_practice_tmp 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" "+e9182f195b8505c87c4bd055b9f6e114ccda0981" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+e9182f195b8505c87c4bd055b9f6e114ccda0981" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3e1e1ab400b3129aab1bda33a26307e74a373648c221ba192cabb5890b37f8f9
[INFO] running `Command { std: "docker" "start" "-a" "3e1e1ab400b3129aab1bda33a26307e74a373648c221ba192cabb5890b37f8f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e1e1ab400b3129aab1bda33a26307e74a373648c221ba192cabb5890b37f8f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e1e1ab400b3129aab1bda33a26307e74a373648c221ba192cabb5890b37f8f9", kill_on_drop: false }`
[INFO] [stdout] 3e1e1ab400b3129aab1bda33a26307e74a373648c221ba192cabb5890b37f8f9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+e9182f195b8505c87c4bd055b9f6e114ccda0981" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 300ba1247b81c0f798137e3efe56a4c7d70a93a65f9c61ad08394d184d9b12d2
[INFO] running `Command { std: "docker" "start" "-a" "300ba1247b81c0f798137e3efe56a4c7d70a93a65f9c61ad08394d184d9b12d2", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated functions `sub`, `mul`, and `div` are never used
[INFO] [stdout]   --> src/main.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl Rational {
[INFO] [stdout]    | ------------- associated functions in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn sub(r1: &Self, r2: &Self) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     fn mul(r1: &Self, r2: &Self) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn div(r1: &Self, r2: &Self) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `sub`, `mul`, and `div` are never used
[INFO] [stdout]   --> src/main.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl Rational {
[INFO] [stdout]    | ------------- associated functions in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn sub(r1: &Self, r2: &Self) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     fn mul(r1: &Self, r2: &Self) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn div(r1: &Self, r2: &Self) -> Self {
[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 0.07s
[INFO] running `Command { std: "docker" "inspect" "300ba1247b81c0f798137e3efe56a4c7d70a93a65f9c61ad08394d184d9b12d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "300ba1247b81c0f798137e3efe56a4c7d70a93a65f9c61ad08394d184d9b12d2", kill_on_drop: false }`
[INFO] [stdout] 300ba1247b81c0f798137e3efe56a4c7d70a93a65f9c61ad08394d184d9b12d2