[INFO] fetching crate drop_arena 0.1.0...
[INFO] checking drop_arena-0.1.0 against master#e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682 for beta-170-4
[INFO] extracting crate drop_arena 0.1.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate drop_arena 0.1.0 on toolchain e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate drop_arena 0.1.0
[INFO] finished tweaking crates.io crate drop_arena 0.1.0
[INFO] tweaked toml for crates.io crate drop_arena 0.1.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dff75e9b17bb501242430c068665de99bfc9f2e7e5e8322456c6e5ecb44a9119
[INFO] running `Command { std: "docker" "start" "-a" "dff75e9b17bb501242430c068665de99bfc9f2e7e5e8322456c6e5ecb44a9119", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dff75e9b17bb501242430c068665de99bfc9f2e7e5e8322456c6e5ecb44a9119", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dff75e9b17bb501242430c068665de99bfc9f2e7e5e8322456c6e5ecb44a9119", kill_on_drop: false }`
[INFO] [stdout] dff75e9b17bb501242430c068665de99bfc9f2e7e5e8322456c6e5ecb44a9119
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ee01c2963975f91bddcfd88d3966788c3b7b490146cf3c11569991fddb0c8d80
[INFO] running `Command { std: "docker" "start" "-a" "ee01c2963975f91bddcfd88d3966788c3b7b490146cf3c11569991fddb0c8d80", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]     Checking serde v1.0.163
[INFO] [stderr]     Checking ciborium-io v0.2.1
[INFO] [stderr]     Checking os_str_bytes v6.5.0
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]     Checking ciborium-ll v0.2.1
[INFO] [stderr]     Checking clap_lex v0.2.4
[INFO] [stderr]     Checking textwrap v0.16.0
[INFO] [stderr]     Checking criterion-plot v0.5.0
[INFO] [stderr]     Checking plotters v0.3.4
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking typed-arena v2.0.2
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking clap v3.2.25
[INFO] [stderr]     Checking drop_arena v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking crossbeam-channel v0.5.8
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]     Checking regex v1.8.3
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]     Checking serde_json v1.0.96
[INFO] [stderr]     Checking ciborium v0.2.1
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.4.0
[INFO] [stdout] warning: calls to `std::mem::forget` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> benches/arena_vs_box.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 |                 std::mem::forget(std::hint::black_box(arena.alloc(i)));
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^------------------------------------^
[INFO] [stdout]    |                                  |
[INFO] [stdout]    |                                  argument has type `&mut i32`
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    = note: `#[warn(forgetting_references)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.93s
[INFO] running `Command { std: "docker" "inspect" "ee01c2963975f91bddcfd88d3966788c3b7b490146cf3c11569991fddb0c8d80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee01c2963975f91bddcfd88d3966788c3b7b490146cf3c11569991fddb0c8d80", kill_on_drop: false }`
[INFO] [stdout] ee01c2963975f91bddcfd88d3966788c3b7b490146cf3c11569991fddb0c8d80
