[INFO] cloning repository https://github.com/NickWentworth/otter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/NickWentworth/otter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNickWentworth%2Fotter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNickWentworth%2Fotter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5a3b8f6c80bf4ecd21c1bc5fbe27e43777d60969
[INFO] building NickWentworth/otter 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%2FNickWentworth%2Fotter" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NickWentworth/otter 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/NickWentworth/otter
[INFO] finished tweaking git repo https://github.com/NickWentworth/otter
[INFO] tweaked toml for git repo https://github.com/NickWentworth/otter written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/NickWentworth/otter 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-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 48fedcd4c934394957b155b48a19bb9fbc564a4e1bb649224b304084e080bee1
[INFO] running `Command { std: "docker" "start" "-a" "48fedcd4c934394957b155b48a19bb9fbc564a4e1bb649224b304084e080bee1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48fedcd4c934394957b155b48a19bb9fbc564a4e1bb649224b304084e080bee1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48fedcd4c934394957b155b48a19bb9fbc564a4e1bb649224b304084e080bee1", kill_on_drop: false }`
[INFO] [stdout] 48fedcd4c934394957b155b48a19bb9fbc564a4e1bb649224b304084e080bee1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 072833be2360871196d109b31333e1f9fb8af042ce689544085e48b748b816f6
[INFO] running `Command { std: "docker" "start" "-a" "072833be2360871196d109b31333e1f9fb8af042ce689544085e48b748b816f6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling regex-syntax v0.7.2
[INFO] [stderr]    Compiling aho-corasick v1.0.2
[INFO] [stderr]    Compiling getrandom v0.2.10
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling regex v1.8.4
[INFO] [stderr]    Compiling otter v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `SearchTT`
[INFO] [stdout]  --> src/search/mod.rs:7:22
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use alpha_beta::{SearchTT, Searcher};
[INFO] [stdout]   |                      ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `to_fen` is never used
[INFO] [stdout]    --> src/board.rs:127:12
[INFO] [stdout]     |
[INFO] [stdout] 48  | impl Board {
[INFO] [stdout]     | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 127 |     pub fn to_fen(&self) -> String {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.69s
[INFO] running `Command { std: "docker" "inspect" "072833be2360871196d109b31333e1f9fb8af042ce689544085e48b748b816f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "072833be2360871196d109b31333e1f9fb8af042ce689544085e48b748b816f6", kill_on_drop: false }`
[INFO] [stdout] 072833be2360871196d109b31333e1f9fb8af042ce689544085e48b748b816f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] cd869e1777aef0cbc4e8bab45c534ed50a41f64bd10cec6d8206722a06fc2ccd
[INFO] running `Command { std: "docker" "start" "-a" "cd869e1777aef0cbc4e8bab45c534ed50a41f64bd10cec6d8206722a06fc2ccd", kill_on_drop: false }`
[INFO] [stderr]    Compiling otter v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `SearchTT`
[INFO] [stdout]  --> src/search/mod.rs:7:22
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use alpha_beta::{SearchTT, Searcher};
[INFO] [stdout]   |                      ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `Command { std: "docker" "inspect" "cd869e1777aef0cbc4e8bab45c534ed50a41f64bd10cec6d8206722a06fc2ccd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd869e1777aef0cbc4e8bab45c534ed50a41f64bd10cec6d8206722a06fc2ccd", kill_on_drop: false }`
[INFO] [stdout] cd869e1777aef0cbc4e8bab45c534ed50a41f64bd10cec6d8206722a06fc2ccd