[INFO] crate connect4-coms 0.1.0 is already in cache
[INFO] checking connect4-coms-0.1.0 against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] extracting crate connect4-coms 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate connect4-coms 0.1.0 on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate connect4-coms 0.1.0
[INFO] finished tweaking crates.io crate connect4-coms 0.1.0
[INFO] tweaked toml for crates.io crate connect4-coms 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "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] 0b6938f7c00db327fd00c22077b394ed67a489487a81bac01e69f3c4923384ef
[INFO] running `Command { std: "docker" "start" "-a" "0b6938f7c00db327fd00c22077b394ed67a489487a81bac01e69f3c4923384ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0b6938f7c00db327fd00c22077b394ed67a489487a81bac01e69f3c4923384ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b6938f7c00db327fd00c22077b394ed67a489487a81bac01e69f3c4923384ef", kill_on_drop: false }`
[INFO] [stdout] 0b6938f7c00db327fd00c22077b394ed67a489487a81bac01e69f3c4923384ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5fb84c5f4b92e3ba47f55e6dd05040fa3774e779cc1b5aff4261d4c6bafc3ff4
[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" "5fb84c5f4b92e3ba47f55e6dd05040fa3774e779cc1b5aff4261d4c6bafc3ff4", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.128
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rayon-core v1.9.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rayon v1.5.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling serde_derive v1.0.128
[INFO] [stderr]     Checking connect4-lib v0.1.0
[INFO] [stderr]     Checking connect4-coms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Player`
[INFO] [stdout]  --> src/types.rs:2:44
[INFO] [stdout]   |
[INFO] [stdout] 2 | use connect4_lib::game::{BoardState, Game, Player};
[INFO] [stdout]   |                                            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `username` should have an upper camel case name
[INFO] [stdout]   --> src/types.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     username(String),
[INFO] [stdout]    |     ^^^^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Username`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Player`
[INFO] [stdout]  --> src/types.rs:2:44
[INFO] [stdout]   |
[INFO] [stdout] 2 | use connect4_lib::game::{BoardState, Game, Player};
[INFO] [stdout]   |                                            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `username` should have an upper camel case name
[INFO] [stdout]   --> src/types.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     username(String),
[INFO] [stdout]    |     ^^^^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Username`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.61s
[INFO] running `Command { std: "docker" "inspect" "5fb84c5f4b92e3ba47f55e6dd05040fa3774e779cc1b5aff4261d4c6bafc3ff4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fb84c5f4b92e3ba47f55e6dd05040fa3774e779cc1b5aff4261d4c6bafc3ff4", kill_on_drop: false }`
[INFO] [stdout] 5fb84c5f4b92e3ba47f55e6dd05040fa3774e779cc1b5aff4261d4c6bafc3ff4