[INFO] cloning repository https://github.com/Pungyeon/rust-tactoe
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Pungyeon/rust-tactoe" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPungyeon%2Frust-tactoe", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPungyeon%2Frust-tactoe'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 33c9895132464ebc3c8edf4068e2af1cd2f346eb
[INFO] checking Pungyeon/rust-tactoe against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPungyeon%2Frust-tactoe" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Pungyeon/rust-tactoe on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Pungyeon/rust-tactoe
[INFO] finished tweaking git repo https://github.com/Pungyeon/rust-tactoe
[INFO] tweaked toml for git repo https://github.com/Pungyeon/rust-tactoe written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/Pungyeon/rust-tactoe already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 157548142b14353ff46feb8d61ad25b7b978c26df523f140f1c3a4d57e3bc3ef
[INFO] running `Command { std: "docker" "start" "-a" "157548142b14353ff46feb8d61ad25b7b978c26df523f140f1c3a4d57e3bc3ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "157548142b14353ff46feb8d61ad25b7b978c26df523f140f1c3a4d57e3bc3ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "157548142b14353ff46feb8d61ad25b7b978c26df523f140f1c3a4d57e3bc3ef", kill_on_drop: false }`
[INFO] [stdout] 157548142b14353ff46feb8d61ad25b7b978c26df523f140f1c3a4d57e3bc3ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a1e6963317d51729ac3908de788c35d5e5e910e1e9f94b34a6aae6f41b58145e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a1e6963317d51729ac3908de788c35d5e5e910e1e9f94b34a6aae6f41b58145e", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_play v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `txt`
[INFO] [stdout]    --> src/main.rs:209:16
[INFO] [stdout]     |
[INFO] [stdout] 209 |             Ok(txt) => {
[INFO] [stdout]     |                ^^^ help: if this is intentional, prefix it with an underscore: `_txt`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `txt`
[INFO] [stdout]    --> src/main.rs:209:16
[INFO] [stdout]     |
[INFO] [stdout] 209 |             Ok(txt) => {
[INFO] [stdout]     |                ^^^ help: if this is intentional, prefix it with an underscore: `_txt`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "a1e6963317d51729ac3908de788c35d5e5e910e1e9f94b34a6aae6f41b58145e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1e6963317d51729ac3908de788c35d5e5e910e1e9f94b34a6aae6f41b58145e", kill_on_drop: false }`
[INFO] [stdout] a1e6963317d51729ac3908de788c35d5e5e910e1e9f94b34a6aae6f41b58145e