[INFO] cloning repository https://github.com/Olssdani/file-descriptors
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Olssdani/file-descriptors" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOlssdani%2Ffile-descriptors", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOlssdani%2Ffile-descriptors'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 696ca1d32348516dcacec226c8c4cd32392dad25
[INFO] building Olssdani/file-descriptors 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%2FOlssdani%2Ffile-descriptors" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Olssdani/file-descriptors 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/Olssdani/file-descriptors
[INFO] finished tweaking git repo https://github.com/Olssdani/file-descriptors
[INFO] tweaked toml for git repo https://github.com/Olssdani/file-descriptors written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Olssdani/file-descriptors 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-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 5e2e7abc22c8286906b8d20533094c8b205554ee35bd8739bfc977568552a9e3
[INFO] running `Command { std: "docker" "start" "-a" "5e2e7abc22c8286906b8d20533094c8b205554ee35bd8739bfc977568552a9e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e2e7abc22c8286906b8d20533094c8b205554ee35bd8739bfc977568552a9e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e2e7abc22c8286906b8d20533094c8b205554ee35bd8739bfc977568552a9e3", kill_on_drop: false }`
[INFO] [stdout] 5e2e7abc22c8286906b8d20533094c8b205554ee35bd8739bfc977568552a9e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] db78d56583410d4183125cc1bb57ac74017ce670edc3401ef5a9aff46f81a7bd
[INFO] running `Command { std: "docker" "start" "-a" "db78d56583410d4183125cc1bb57ac74017ce670edc3401ef5a9aff46f81a7bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.141
[INFO] [stderr]    Compiling nix v0.26.2
[INFO] [stderr]    Compiling ctrlc v3.2.5
[INFO] [stderr]    Compiling file_descriptor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `File` and `io::Write`
[INFO] [stdout]  --> src/main.rs:3:16
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fs::{self, File},
[INFO] [stdout]   |                ^^^^
[INFO] [stdout] 4 |     io::Write,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.97s
[INFO] running `Command { std: "docker" "inspect" "db78d56583410d4183125cc1bb57ac74017ce670edc3401ef5a9aff46f81a7bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db78d56583410d4183125cc1bb57ac74017ce670edc3401ef5a9aff46f81a7bd", kill_on_drop: false }`
[INFO] [stdout] db78d56583410d4183125cc1bb57ac74017ce670edc3401ef5a9aff46f81a7bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] f945913782fdbf0ed823e981c551e68c323236972059ed68d3ee713a40107f6f
[INFO] running `Command { std: "docker" "start" "-a" "f945913782fdbf0ed823e981c551e68c323236972059ed68d3ee713a40107f6f", kill_on_drop: false }`
[INFO] [stderr]    Compiling file_descriptor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `File` and `io::Write`
[INFO] [stdout]  --> src/main.rs:3:16
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fs::{self, File},
[INFO] [stdout]   |                ^^^^
[INFO] [stdout] 4 |     io::Write,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "f945913782fdbf0ed823e981c551e68c323236972059ed68d3ee713a40107f6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f945913782fdbf0ed823e981c551e68c323236972059ed68d3ee713a40107f6f", kill_on_drop: false }`
[INFO] [stdout] f945913782fdbf0ed823e981c551e68c323236972059ed68d3ee713a40107f6f