[INFO] cloning repository https://github.com/AI1411/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AI1411/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAI1411%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAI1411%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1f5cdea0cd7d1e18d2307e9b222e89b3eacda4b0
[INFO] building AI1411/rust-playground 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%2FAI1411%2Frust-playground" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/AI1411/rust-playground 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/AI1411/rust-playground
[INFO] finished tweaking git repo https://github.com/AI1411/rust-playground
[INFO] tweaked toml for git repo https://github.com/AI1411/rust-playground written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/AI1411/rust-playground 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-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] d31ad43cd9b37c878c52494a64248275d7416cd37828cf54581ad54ca864ebde
[INFO] running `Command { std: "docker" "start" "-a" "d31ad43cd9b37c878c52494a64248275d7416cd37828cf54581ad54ca864ebde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d31ad43cd9b37c878c52494a64248275d7416cd37828cf54581ad54ca864ebde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d31ad43cd9b37c878c52494a64248275d7416cd37828cf54581ad54ca864ebde", kill_on_drop: false }`
[INFO] [stdout] d31ad43cd9b37c878c52494a64248275d7416cd37828cf54581ad54ca864ebde
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] a27ab2d389b09efd1c521f46be4689cfe114f67ed022657203a323da8aa45d4a
[INFO] running `Command { std: "docker" "start" "-a" "a27ab2d389b09efd1c521f46be4689cfe114f67ed022657203a323da8aa45d4a", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling train v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `binary_search_rec` is never used
[INFO] [stdout]  --> src/searching/binary_search_recursive.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn binary_search_rec<T: Ord>(
[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 1.52s
[INFO] running `Command { std: "docker" "inspect" "a27ab2d389b09efd1c521f46be4689cfe114f67ed022657203a323da8aa45d4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a27ab2d389b09efd1c521f46be4689cfe114f67ed022657203a323da8aa45d4a", kill_on_drop: false }`
[INFO] [stdout] a27ab2d389b09efd1c521f46be4689cfe114f67ed022657203a323da8aa45d4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] cb60a98552e6ebeabc0d69fde5e1078f1ac732795acfcf5fb4a32fd242d3d467
[INFO] running `Command { std: "docker" "start" "-a" "cb60a98552e6ebeabc0d69fde5e1078f1ac732795acfcf5fb4a32fd242d3d467", kill_on_drop: false }`
[INFO] [stderr]    Compiling train v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `binary_search_rec` is never used
[INFO] [stdout]  --> src/searching/binary_search_recursive.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn binary_search_rec<T: Ord>(
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "cb60a98552e6ebeabc0d69fde5e1078f1ac732795acfcf5fb4a32fd242d3d467", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb60a98552e6ebeabc0d69fde5e1078f1ac732795acfcf5fb4a32fd242d3d467", kill_on_drop: false }`
[INFO] [stdout] cb60a98552e6ebeabc0d69fde5e1078f1ac732795acfcf5fb4a32fd242d3d467