[INFO] cloning repository https://github.com/frostblooded/genetic_traveling_salesman
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/frostblooded/genetic_traveling_salesman" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrostblooded%2Fgenetic_traveling_salesman", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrostblooded%2Fgenetic_traveling_salesman'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b5bd687ad0d73b3449b83c70fd94362eaebf2606
[INFO] building frostblooded/genetic_traveling_salesman 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%2Ffrostblooded%2Fgenetic_traveling_salesman" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/frostblooded/genetic_traveling_salesman 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/frostblooded/genetic_traveling_salesman
[INFO] finished tweaking git repo https://github.com/frostblooded/genetic_traveling_salesman
[INFO] tweaked toml for git repo https://github.com/frostblooded/genetic_traveling_salesman written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/frostblooded/genetic_traveling_salesman 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 4497aa5e52ddf9f341d6c103ee7dd42cde8ff6e7c11ecd0129f44461ee6d4d7f
[INFO] running `Command { std: "docker" "start" "-a" "4497aa5e52ddf9f341d6c103ee7dd42cde8ff6e7c11ecd0129f44461ee6d4d7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4497aa5e52ddf9f341d6c103ee7dd42cde8ff6e7c11ecd0129f44461ee6d4d7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4497aa5e52ddf9f341d6c103ee7dd42cde8ff6e7c11ecd0129f44461ee6d4d7f", kill_on_drop: false }`
[INFO] [stdout] 4497aa5e52ddf9f341d6c103ee7dd42cde8ff6e7c11ecd0129f44461ee6d4d7f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 2126fec94ae2f396542e0ac5375c34ba99f2d011edd32ccfa1603be725a78e38
[INFO] running `Command { std: "docker" "start" "-a" "2126fec94ae2f396542e0ac5375c34ba99f2d011edd32ccfa1603be725a78e38", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling genetic_traveling_salesman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `n` is never read
[INFO] [stdout]   --> src/main.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct TravelingSalesman {
[INFO] [stdout]    |        ----------------- field in this struct
[INFO] [stdout] 23 |     n: u32,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TravelingSalesman` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.10s
[INFO] running `Command { std: "docker" "inspect" "2126fec94ae2f396542e0ac5375c34ba99f2d011edd32ccfa1603be725a78e38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2126fec94ae2f396542e0ac5375c34ba99f2d011edd32ccfa1603be725a78e38", kill_on_drop: false }`
[INFO] [stdout] 2126fec94ae2f396542e0ac5375c34ba99f2d011edd32ccfa1603be725a78e38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] a857efec3865c3c1823ef84c946435f90bd1cd13901029d45ba5e3be5abade33
[INFO] running `Command { std: "docker" "start" "-a" "a857efec3865c3c1823ef84c946435f90bd1cd13901029d45ba5e3be5abade33", kill_on_drop: false }`
[INFO] [stderr]    Compiling genetic_traveling_salesman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `n` is never read
[INFO] [stdout]   --> src/main.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct TravelingSalesman {
[INFO] [stdout]    |        ----------------- field in this struct
[INFO] [stdout] 23 |     n: u32,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TravelingSalesman` has a derived impl for the trait `Debug`, but this is 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 0.14s
[INFO] running `Command { std: "docker" "inspect" "a857efec3865c3c1823ef84c946435f90bd1cd13901029d45ba5e3be5abade33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a857efec3865c3c1823ef84c946435f90bd1cd13901029d45ba5e3be5abade33", kill_on_drop: false }`
[INFO] [stdout] a857efec3865c3c1823ef84c946435f90bd1cd13901029d45ba5e3be5abade33