[INFO] cloning repository https://github.com/bnguyensn/rust-battleship
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bnguyensn/rust-battleship" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbnguyensn%2Frust-battleship", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbnguyensn%2Frust-battleship'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 00dbd48c381497c133f0596c084afef7f09234a0
[INFO] building bnguyensn/rust-battleship 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%2Fbnguyensn%2Frust-battleship" "/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/bnguyensn/rust-battleship 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/bnguyensn/rust-battleship
[INFO] finished tweaking git repo https://github.com/bnguyensn/rust-battleship
[INFO] tweaked toml for git repo https://github.com/bnguyensn/rust-battleship written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/bnguyensn/rust-battleship 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] 1008eb0e739f0b4b17306f5f8523ffb91e5cd618fcb69f0277050d913f90e820
[INFO] running `Command { std: "docker" "start" "-a" "1008eb0e739f0b4b17306f5f8523ffb91e5cd618fcb69f0277050d913f90e820", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1008eb0e739f0b4b17306f5f8523ffb91e5cd618fcb69f0277050d913f90e820", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1008eb0e739f0b4b17306f5f8523ffb91e5cd618fcb69f0277050d913f90e820", kill_on_drop: false }`
[INFO] [stdout] 1008eb0e739f0b4b17306f5f8523ffb91e5cd618fcb69f0277050d913f90e820
[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] e5969ef8663d5d8228b9482ee172ad84bb77e107e61540f5067e3a8401a1ef03
[INFO] running `Command { std: "docker" "start" "-a" "e5969ef8663d5d8228b9482ee172ad84bb77e107e61540f5067e3a8401a1ef03", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-battleship v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/board.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct Ship {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 26 |     pub id: char,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Ship` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_remaining_ships_count` is never used
[INFO] [stdout]   --> src/board.rs:91:12
[INFO] [stdout]    |
[INFO] [stdout] 62 | impl Board {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 91 |     pub fn get_remaining_ships_count(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "e5969ef8663d5d8228b9482ee172ad84bb77e107e61540f5067e3a8401a1ef03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5969ef8663d5d8228b9482ee172ad84bb77e107e61540f5067e3a8401a1ef03", kill_on_drop: false }`
[INFO] [stdout] e5969ef8663d5d8228b9482ee172ad84bb77e107e61540f5067e3a8401a1ef03
[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] faca625b717bd586619a5a2463be930749c91a27a14a72f52c4d5a170093020a
[INFO] running `Command { std: "docker" "start" "-a" "faca625b717bd586619a5a2463be930749c91a27a14a72f52c4d5a170093020a", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-battleship v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/board.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct Ship {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 26 |     pub id: char,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Ship` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "faca625b717bd586619a5a2463be930749c91a27a14a72f52c4d5a170093020a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "faca625b717bd586619a5a2463be930749c91a27a14a72f52c4d5a170093020a", kill_on_drop: false }`
[INFO] [stdout] faca625b717bd586619a5a2463be930749c91a27a14a72f52c4d5a170093020a