[INFO] cloning repository https://github.com/Usummon/tic-tac-toe-decision-tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Usummon/tic-tac-toe-decision-tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUsummon%2Ftic-tac-toe-decision-tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUsummon%2Ftic-tac-toe-decision-tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 274fb0c805cb1c2df5c464ac2fb4471c4dca54b1
[INFO] checking Usummon/tic-tac-toe-decision-tree against master#6526e5c772f2da07db745c94ca6bb0a591a39ba4 for pr-80920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUsummon%2Ftic-tac-toe-decision-tree" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Usummon/tic-tac-toe-decision-tree on toolchain 6526e5c772f2da07db745c94ca6bb0a591a39ba4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Usummon/tic-tac-toe-decision-tree
[INFO] finished tweaking git repo https://github.com/Usummon/tic-tac-toe-decision-tree
[INFO] tweaked toml for git repo https://github.com/Usummon/tic-tac-toe-decision-tree written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/Usummon/tic-tac-toe-decision-tree already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f733d8f14c0a96b02b6d6d5d10cf9ce7814d365e773c746103f2a150ff021fcf
[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" "f733d8f14c0a96b02b6d6d5d10cf9ce7814d365e773c746103f2a150ff021fcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f733d8f14c0a96b02b6d6d5d10cf9ce7814d365e773c746103f2a150ff021fcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f733d8f14c0a96b02b6d6d5d10cf9ce7814d365e773c746103f2a150ff021fcf", kill_on_drop: false }`
[INFO] [stdout] f733d8f14c0a96b02b6d6d5d10cf9ce7814d365e773c746103f2a150ff021fcf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0314c8879fac948091780f86ed794d2a796eaf0bef7474a445cd7fb387afaf6e
[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" "0314c8879fac948091780f86ed794d2a796eaf0bef7474a445cd7fb387afaf6e", kill_on_drop: false }`
[INFO] [stderr]     Checking recursive_tic_tac v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:188:6
[INFO] [stdout]     |
[INFO] [stdout] 188 |     let mut win_conditions = vec![[player,0,0, player,0,0, player,0,0],
[INFO] [stdout]     |         ----^^^^^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:197:6
[INFO] [stdout]     |
[INFO] [stdout] 197 |     let mut copy_conditions = vec![[player,0,0, player,0,0, player,0,0],
[INFO] [stdout]     |         ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:188:6
[INFO] [stdout]     |
[INFO] [stdout] 188 |     let mut win_conditions = vec![[player,0,0, player,0,0, player,0,0],
[INFO] [stdout]     |         ----^^^^^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:197:6
[INFO] [stdout]     |
[INFO] [stdout] 197 |     let mut copy_conditions = vec![[player,0,0, player,0,0, player,0,0],
[INFO] [stdout]     |         ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "0314c8879fac948091780f86ed794d2a796eaf0bef7474a445cd7fb387afaf6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0314c8879fac948091780f86ed794d2a796eaf0bef7474a445cd7fb387afaf6e", kill_on_drop: false }`
[INFO] [stdout] 0314c8879fac948091780f86ed794d2a796eaf0bef7474a445cd7fb387afaf6e