[INFO] cloning repository https://github.com/sciencefidelity/challenge
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sciencefidelity/challenge" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsciencefidelity%2Fchallenge", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsciencefidelity%2Fchallenge'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9fa82f0d1a20bd2fb6beffa20125c53d792ded34
[INFO] building sciencefidelity/challenge 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%2Fsciencefidelity%2Fchallenge" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sciencefidelity/challenge 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/sciencefidelity/challenge
[INFO] finished tweaking git repo https://github.com/sciencefidelity/challenge
[INFO] tweaked toml for git repo https://github.com/sciencefidelity/challenge written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sciencefidelity/challenge 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-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] fc39e602440a4a146b5ee8fecd4f831a9919865f5dbdad4393a83d765e51e3a7
[INFO] running `Command { std: "docker" "start" "-a" "fc39e602440a4a146b5ee8fecd4f831a9919865f5dbdad4393a83d765e51e3a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc39e602440a4a146b5ee8fecd4f831a9919865f5dbdad4393a83d765e51e3a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc39e602440a4a146b5ee8fecd4f831a9919865f5dbdad4393a83d765e51e3a7", kill_on_drop: false }`
[INFO] [stdout] fc39e602440a4a146b5ee8fecd4f831a9919865f5dbdad4393a83d765e51e3a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 6f26f00212c194a55bdf9138bdfd0b1dfb268a54e4204b24699b6961af4f7f4c
[INFO] running `Command { std: "docker" "start" "-a" "6f26f00212c194a55bdf9138bdfd0b1dfb268a54e4204b24699b6961af4f7f4c", kill_on_drop: false }`
[INFO] [stderr]    Compiling linked v0.1.0 (/opt/rustwide/workdir/crates/linked)
[INFO] [stderr]    Compiling utils v0.1.0 (/opt/rustwide/workdir/crates/utils)
[INFO] [stderr]    Compiling b_tree v0.1.0 (/opt/rustwide/workdir/crates/b_tree)
[INFO] [stderr]    Compiling challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.47s
[INFO] running `Command { std: "docker" "inspect" "6f26f00212c194a55bdf9138bdfd0b1dfb268a54e4204b24699b6961af4f7f4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f26f00212c194a55bdf9138bdfd0b1dfb268a54e4204b24699b6961af4f7f4c", kill_on_drop: false }`
[INFO] [stdout] 6f26f00212c194a55bdf9138bdfd0b1dfb268a54e4204b24699b6961af4f7f4c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] c5a52a1422a2c6764c7ce1f250ecc6752f8fb6f8657a1c504391ad6fe062505c
[INFO] running `Command { std: "docker" "start" "-a" "c5a52a1422a2c6764c7ce1f250ecc6752f8fb6f8657a1c504391ad6fe062505c", kill_on_drop: false }`
[INFO] [stderr]    Compiling challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 5.69s
[INFO] running `Command { std: "docker" "inspect" "c5a52a1422a2c6764c7ce1f250ecc6752f8fb6f8657a1c504391ad6fe062505c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5a52a1422a2c6764c7ce1f250ecc6752f8fb6f8657a1c504391ad6fe062505c", kill_on_drop: false }`
[INFO] [stdout] c5a52a1422a2c6764c7ce1f250ecc6752f8fb6f8657a1c504391ad6fe062505c