[INFO] fetching crate mcl_rust 1.0.2...
[INFO] building mcl_rust-1.0.2 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] extracting crate mcl_rust 1.0.2 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate mcl_rust 1.0.2 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 crates.io crate mcl_rust 1.0.2
[INFO] finished tweaking crates.io crate mcl_rust 1.0.2
[INFO] tweaked toml for crates.io crate mcl_rust 1.0.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate mcl_rust 1.0.2 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] [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] 99f72f2020fe05c874951d950386e033dd599891d0a3ea151b5b77f45a424f2a
[INFO] running `Command { std: "docker" "start" "-a" "99f72f2020fe05c874951d950386e033dd599891d0a3ea151b5b77f45a424f2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "99f72f2020fe05c874951d950386e033dd599891d0a3ea151b5b77f45a424f2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99f72f2020fe05c874951d950386e033dd599891d0a3ea151b5b77f45a424f2a", kill_on_drop: false }`
[INFO] [stdout] 99f72f2020fe05c874951d950386e033dd599891d0a3ea151b5b77f45a424f2a
[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] c99bf88068c582beaac49af92cb1aad42eb28f6af8816bf648f4bdcf2809f229
[INFO] running `Command { std: "docker" "start" "-a" "c99bf88068c582beaac49af92cb1aad42eb28f6af8816bf648f4bdcf2809f229", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.152
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]    Compiling mcl_rust v1.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 23.82s
[INFO] running `Command { std: "docker" "inspect" "c99bf88068c582beaac49af92cb1aad42eb28f6af8816bf648f4bdcf2809f229", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c99bf88068c582beaac49af92cb1aad42eb28f6af8816bf648f4bdcf2809f229", kill_on_drop: false }`
[INFO] [stdout] c99bf88068c582beaac49af92cb1aad42eb28f6af8816bf648f4bdcf2809f229
[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] 63581be882e245308be01d5b54590fdf0c5faedb16e2e07785c364ebb905d6f6
[INFO] running `Command { std: "docker" "start" "-a" "63581be882e245308be01d5b54590fdf0c5faedb16e2e07785c364ebb905d6f6", kill_on_drop: false }`
[INFO] [stderr]    Compiling mcl_rust v1.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "63581be882e245308be01d5b54590fdf0c5faedb16e2e07785c364ebb905d6f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63581be882e245308be01d5b54590fdf0c5faedb16e2e07785c364ebb905d6f6", kill_on_drop: false }`
[INFO] [stdout] 63581be882e245308be01d5b54590fdf0c5faedb16e2e07785c364ebb905d6f6