[INFO] cloning repository https://github.com/kanngji/ruststudy
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kanngji/ruststudy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkanngji%2Fruststudy", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkanngji%2Fruststudy'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 898650130d7393675f39490ed2e2b067663ad907
[INFO] checking kanngji/ruststudy against master#85c39893a761fe4c050523278da4e7e45ab42b6e for pr-134688
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkanngji%2Fruststudy" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kanngji/ruststudy on toolchain 85c39893a761fe4c050523278da4e7e45ab42b6e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+85c39893a761fe4c050523278da4e7e45ab42b6e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kanngji/ruststudy
[INFO] finished tweaking git repo https://github.com/kanngji/ruststudy
[INFO] tweaked toml for git repo https://github.com/kanngji/ruststudy written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/kanngji/ruststudy 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" "+85c39893a761fe4c050523278da4e7e45ab42b6e" "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-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+85c39893a761fe4c050523278da4e7e45ab42b6e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 970e7afb5b32f4fd533dbb146473624b9e4c0c08fa2d2cc1d3744d22748006e7
[INFO] running `Command { std: "docker" "start" "-a" "970e7afb5b32f4fd533dbb146473624b9e4c0c08fa2d2cc1d3744d22748006e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "970e7afb5b32f4fd533dbb146473624b9e4c0c08fa2d2cc1d3744d22748006e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "970e7afb5b32f4fd533dbb146473624b9e4c0c08fa2d2cc1d3744d22748006e7", kill_on_drop: false }`
[INFO] [stdout] 970e7afb5b32f4fd533dbb146473624b9e4c0c08fa2d2cc1d3744d22748006e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "-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" "+85c39893a761fe4c050523278da4e7e45ab42b6e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca10ba9ab72b97a390b39c7bc3ad3d0c00a9aaf03f6538731cbf96163653d04f
[INFO] running `Command { std: "docker" "start" "-a" "ca10ba9ab72b97a390b39c7bc3ad3d0c00a9aaf03f6538731cbf96163653d04f", kill_on_drop: false }`
[INFO] [stderr]     Checking bdb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::mem::size_of`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::mem::size_of;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem::size_of`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::mem::size_of;
[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 0.08s
[INFO] running `Command { std: "docker" "inspect" "ca10ba9ab72b97a390b39c7bc3ad3d0c00a9aaf03f6538731cbf96163653d04f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca10ba9ab72b97a390b39c7bc3ad3d0c00a9aaf03f6538731cbf96163653d04f", kill_on_drop: false }`
[INFO] [stdout] ca10ba9ab72b97a390b39c7bc3ad3d0c00a9aaf03f6538731cbf96163653d04f