[INFO] cloning repository https://github.com/chessrajat/Exercism_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chessrajat/Exercism_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchessrajat%2FExercism_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchessrajat%2FExercism_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9c92000781f587bbab41446587493109ddd44ee2
[INFO] building chessrajat/Exercism_rust 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%2Fchessrajat%2FExercism_rust" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chessrajat/Exercism_rust 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/chessrajat/Exercism_rust
[INFO] finished tweaking git repo https://github.com/chessrajat/Exercism_rust
[INFO] tweaked toml for git repo https://github.com/chessrajat/Exercism_rust written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/chessrajat/Exercism_rust 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-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] ace1d5590293a0ad95a86825403f472126c8019d733d3e081fb0bfb9941a182a
[INFO] running `Command { std: "docker" "start" "-a" "ace1d5590293a0ad95a86825403f472126c8019d733d3e081fb0bfb9941a182a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ace1d5590293a0ad95a86825403f472126c8019d733d3e081fb0bfb9941a182a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ace1d5590293a0ad95a86825403f472126c8019d733d3e081fb0bfb9941a182a", kill_on_drop: false }`
[INFO] [stdout] ace1d5590293a0ad95a86825403f472126c8019d733d3e081fb0bfb9941a182a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 246a6ae5de7c20e95a7f1723b043d4b0aee9a83d920d61fda8f5922dc5002489
[INFO] running `Command { std: "docker" "start" "-a" "246a6ae5de7c20e95a7f1723b043d4b0aee9a83d920d61fda8f5922dc5002489", kill_on_drop: false }`
[INFO] [stderr]    Compiling time-core v0.1.1
[INFO] [stderr]    Compiling unicode-segmentation v1.10.1
[INFO] [stderr]    Compiling threadpool v1.8.1
[INFO] [stderr]    Compiling time-macros v0.2.9
[INFO] [stderr]    Compiling time v0.3.21
[INFO] [stderr]    Compiling exercism_rust_track v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.48s
[INFO] running `Command { std: "docker" "inspect" "246a6ae5de7c20e95a7f1723b043d4b0aee9a83d920d61fda8f5922dc5002489", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "246a6ae5de7c20e95a7f1723b043d4b0aee9a83d920d61fda8f5922dc5002489", kill_on_drop: false }`
[INFO] [stdout] 246a6ae5de7c20e95a7f1723b043d4b0aee9a83d920d61fda8f5922dc5002489
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 2155b35c3323861fa596faa385d8540830e9ec68c27fd583896cb17ebfb1f6a2
[INFO] running `Command { std: "docker" "start" "-a" "2155b35c3323861fa596faa385d8540830e9ec68c27fd583896cb17ebfb1f6a2", kill_on_drop: false }`
[INFO] [stderr]    Compiling exercism_rust_track v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "2155b35c3323861fa596faa385d8540830e9ec68c27fd583896cb17ebfb1f6a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2155b35c3323861fa596faa385d8540830e9ec68c27fd583896cb17ebfb1f6a2", kill_on_drop: false }`
[INFO] [stdout] 2155b35c3323861fa596faa385d8540830e9ec68c27fd583896cb17ebfb1f6a2