[INFO] fetching crate connect4-lib 0.1.0...
[INFO] checking connect4-lib-0.1.0 against master#4fb54ed484e2239a3e9eff3be17df00d2a162be3 for pr-73345
[INFO] extracting crate connect4-lib 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate connect4-lib 0.1.0 on toolchain 4fb54ed484e2239a3e9eff3be17df00d2a162be3
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate connect4-lib 0.1.0
[INFO] finished tweaking crates.io crate connect4-lib 0.1.0
[INFO] tweaked toml for crates.io crate connect4-lib 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate connect4-lib 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6e04eeb6620a0e25ca14c049043239b53ec8dfcd32e6857956a055b450809cfb
[INFO] running `"docker" "start" "-a" "6e04eeb6620a0e25ca14c049043239b53ec8dfcd32e6857956a055b450809cfb"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]     Checking connect4-lib v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused imports: `Checker`, `check_linear_pattern`
[INFO] [stderr]  --> src/games.rs:2:19
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::game::{check_linear_pattern, Board, Checker, ChipDescrip, Game, Player, PlayerType};
[INFO] [stderr]   |                   ^^^^^^^^^^^^^^^^^^^^         ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]  --> src/games.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::rc::Rc;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Checker`, `check_linear_pattern`
[INFO] [stderr]  --> src/games.rs:2:19
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::game::{check_linear_pattern, Board, Checker, ChipDescrip, Game, Player, PlayerType};
[INFO] [stderr]   |                   ^^^^^^^^^^^^^^^^^^^^         ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]  --> src/games.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::rc::Rc;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `game`
[INFO] [stderr]    --> src/game/mod.rs:412:13
[INFO] [stderr]     |
[INFO] [stderr] 412 |         let game = make_game(&[2]);
[INFO] [stderr]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_game`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 40.22s
[INFO] running `"docker" "inspect" "6e04eeb6620a0e25ca14c049043239b53ec8dfcd32e6857956a055b450809cfb"`
[INFO] running `"docker" "rm" "-f" "6e04eeb6620a0e25ca14c049043239b53ec8dfcd32e6857956a055b450809cfb"`
[INFO] [stdout] 6e04eeb6620a0e25ca14c049043239b53ec8dfcd32e6857956a055b450809cfb