[INFO] cloning repository https://github.com/michaelszymczak/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/michaelszymczak/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelszymczak%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelszymczak%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 167b6a1ecef6fd71a5ec7b0ead13a52977bee344
[INFO] building michaelszymczak/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%2Fmichaelszymczak%2Frust-playground" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/michaelszymczak/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/michaelszymczak/rust-playground
[INFO] finished tweaking git repo https://github.com/michaelszymczak/rust-playground
[INFO] tweaked toml for git repo https://github.com/michaelszymczak/rust-playground written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/michaelszymczak/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] a05ad4c8a7765c57da728ef60ad8ecaa944dac9b0a4510eaa5beffe7131fc876
[INFO] running `Command { std: "docker" "start" "-a" "a05ad4c8a7765c57da728ef60ad8ecaa944dac9b0a4510eaa5beffe7131fc876", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a05ad4c8a7765c57da728ef60ad8ecaa944dac9b0a4510eaa5beffe7131fc876", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a05ad4c8a7765c57da728ef60ad8ecaa944dac9b0a4510eaa5beffe7131fc876", kill_on_drop: false }`
[INFO] [stdout] a05ad4c8a7765c57da728ef60ad8ecaa944dac9b0a4510eaa5beffe7131fc876
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 529b3b90ab11d50dd2fb4a4759d23364ddcdba1da2a60eb623bec1b647d18dde
[INFO] running `Command { std: "docker" "start" "-a" "529b3b90ab11d50dd2fb4a4759d23364ddcdba1da2a60eb623bec1b647d18dde", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling tcp v0.1.0 (/opt/rustwide/workdir/tcp)
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling misc001 v0.1.0 (/opt/rustwide/workdir/misc001)
[INFO] [stderr]    Compiling guess v0.1.0 (/opt/rustwide/workdir/guess)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.51s
[INFO] running `Command { std: "docker" "inspect" "529b3b90ab11d50dd2fb4a4759d23364ddcdba1da2a60eb623bec1b647d18dde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "529b3b90ab11d50dd2fb4a4759d23364ddcdba1da2a60eb623bec1b647d18dde", kill_on_drop: false }`
[INFO] [stdout] 529b3b90ab11d50dd2fb4a4759d23364ddcdba1da2a60eb623bec1b647d18dde
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 6bc8f68a982283dfa2749bcd40ce51939aeb0c935d1862c0299154440c1b2e9c
[INFO] running `Command { std: "docker" "start" "-a" "6bc8f68a982283dfa2749bcd40ce51939aeb0c935d1862c0299154440c1b2e9c", kill_on_drop: false }`
[INFO] [stderr]    Compiling tcp v0.1.0 (/opt/rustwide/workdir/tcp)
[INFO] [stderr]    Compiling guess v0.1.0 (/opt/rustwide/workdir/guess)
[INFO] [stderr]    Compiling misc001 v0.1.0 (/opt/rustwide/workdir/misc001)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "6bc8f68a982283dfa2749bcd40ce51939aeb0c935d1862c0299154440c1b2e9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bc8f68a982283dfa2749bcd40ce51939aeb0c935d1862c0299154440c1b2e9c", kill_on_drop: false }`
[INFO] [stdout] 6bc8f68a982283dfa2749bcd40ce51939aeb0c935d1862c0299154440c1b2e9c