[INFO] cloning repository https://github.com/aljce/ribbon
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aljce/ribbon" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faljce%2Fribbon", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faljce%2Fribbon'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5282549e19386219759d82c77371ee2cc68824ff
[INFO] building aljce/ribbon against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faljce%2Fribbon" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aljce/ribbon on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/aljce/ribbon
[INFO] finished tweaking git repo https://github.com/aljce/ribbon
[INFO] tweaked toml for git repo https://github.com/aljce/ribbon written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/aljce/ribbon 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 86d102d0b19539b4b71da2537aabab4b6de886d2c4fc269480ebe0245408af94
[INFO] running `Command { std: "docker" "start" "-a" "86d102d0b19539b4b71da2537aabab4b6de886d2c4fc269480ebe0245408af94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "86d102d0b19539b4b71da2537aabab4b6de886d2c4fc269480ebe0245408af94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86d102d0b19539b4b71da2537aabab4b6de886d2c4fc269480ebe0245408af94", kill_on_drop: false }`
[INFO] [stdout] 86d102d0b19539b4b71da2537aabab4b6de886d2c4fc269480ebe0245408af94
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d7baa434ec46a51591c600a91a78b0bbefde7d6d5e64aa264e22ca524765718b
[INFO] running `Command { std: "docker" "start" "-a" "d7baa434ec46a51591c600a91a78b0bbefde7d6d5e64aa264e22ca524765718b", kill_on_drop: false }`
[INFO] [stderr]    Compiling ribbon v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `zobrist` is never used
[INFO] [stdout]   --> src/board.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub trait Representation {
[INFO] [stdout]    |           -------------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 80 |     fn zobrist<'a>(&'a self) -> u64;
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `negamax` is never used
[INFO] [stdout]  --> src/search.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn negamax<'a, R: Representation>(board: &'a mut R, depth: usize) -> i8 {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "d7baa434ec46a51591c600a91a78b0bbefde7d6d5e64aa264e22ca524765718b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7baa434ec46a51591c600a91a78b0bbefde7d6d5e64aa264e22ca524765718b", kill_on_drop: false }`
[INFO] [stdout] d7baa434ec46a51591c600a91a78b0bbefde7d6d5e64aa264e22ca524765718b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e36f2a6db665f400c0f396249d74e042934fd51a4c5910adb9958e37feee1256
[INFO] running `Command { std: "docker" "start" "-a" "e36f2a6db665f400c0f396249d74e042934fd51a4c5910adb9958e37feee1256", kill_on_drop: false }`
[INFO] [stderr]    Compiling ribbon v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `zobrist` is never used
[INFO] [stdout]   --> src/board.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub trait Representation {
[INFO] [stdout]    |           -------------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 80 |     fn zobrist<'a>(&'a self) -> u64;
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `negamax` is never used
[INFO] [stdout]  --> src/search.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn negamax<'a, R: Representation>(board: &'a mut R, depth: usize) -> i8 {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "e36f2a6db665f400c0f396249d74e042934fd51a4c5910adb9958e37feee1256", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e36f2a6db665f400c0f396249d74e042934fd51a4c5910adb9958e37feee1256", kill_on_drop: false }`
[INFO] [stdout] e36f2a6db665f400c0f396249d74e042934fd51a4c5910adb9958e37feee1256