[INFO] fetching crate exercism_prep_tests 0.6.1...
[INFO] building exercism_prep_tests-0.6.1 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] extracting crate exercism_prep_tests 0.6.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate exercism_prep_tests 0.6.1 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 exercism_prep_tests 0.6.1
[INFO] finished tweaking crates.io crate exercism_prep_tests 0.6.1
[INFO] tweaked toml for crates.io crate exercism_prep_tests 0.6.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate exercism_prep_tests 0.6.1 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded envmnt v0.10.4
[INFO] [stderr]   Downloaded fsio v0.4.0
[INFO] [stderr]   Downloaded clioptions v0.1.0
[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] d34abefe2b49d2aabbcf5b4fe20ee8f5d5a9d1dfb1b446246d47e42dc7273a9c
[INFO] running `Command { std: "docker" "start" "-a" "d34abefe2b49d2aabbcf5b4fe20ee8f5d5a9d1dfb1b446246d47e42dc7273a9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d34abefe2b49d2aabbcf5b4fe20ee8f5d5a9d1dfb1b446246d47e42dc7273a9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d34abefe2b49d2aabbcf5b4fe20ee8f5d5a9d1dfb1b446246d47e42dc7273a9c", kill_on_drop: false }`
[INFO] [stdout] d34abefe2b49d2aabbcf5b4fe20ee8f5d5a9d1dfb1b446246d47e42dc7273a9c
[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] 9168914d77687b6ca5698c85259c3f7a877dd8fc6703786ab60cc14cc1168f2a
[INFO] running `Command { std: "docker" "start" "-a" "9168914d77687b6ca5698c85259c3f7a877dd8fc6703786ab60cc14cc1168f2a", kill_on_drop: false }`
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling fsio v0.4.0
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling clioptions v0.1.0
[INFO] [stderr]    Compiling envmnt v0.10.4
[INFO] [stderr]    Compiling exercism_prep_tests v0.6.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.06s
[INFO] running `Command { std: "docker" "inspect" "9168914d77687b6ca5698c85259c3f7a877dd8fc6703786ab60cc14cc1168f2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9168914d77687b6ca5698c85259c3f7a877dd8fc6703786ab60cc14cc1168f2a", kill_on_drop: false }`
[INFO] [stdout] 9168914d77687b6ca5698c85259c3f7a877dd8fc6703786ab60cc14cc1168f2a
[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] ecf3b961cc69e710ae163b235cce7a84bb05e5b1b59adea2bae26e4cd5b3744e
[INFO] running `Command { std: "docker" "start" "-a" "ecf3b961cc69e710ae163b235cce7a84bb05e5b1b59adea2bae26e4cd5b3744e", kill_on_drop: false }`
[INFO] [stderr]    Compiling exercism_prep_tests v0.6.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "ecf3b961cc69e710ae163b235cce7a84bb05e5b1b59adea2bae26e4cd5b3744e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecf3b961cc69e710ae163b235cce7a84bb05e5b1b59adea2bae26e4cd5b3744e", kill_on_drop: false }`
[INFO] [stdout] ecf3b961cc69e710ae163b235cce7a84bb05e5b1b59adea2bae26e4cd5b3744e