[INFO] fetching crate lunatic 0.2.0...
[INFO] checking lunatic-0.2.0 against beta for pr-78714
[INFO] extracting crate lunatic 0.2.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate lunatic 0.2.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lunatic 0.2.0
[INFO] finished tweaking crates.io crate lunatic 0.2.0
[INFO] tweaked toml for crates.io crate lunatic 0.2.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 74ecdba78052a5c550a02dd06286b173dca9c82cfde094ae3398ba8bbcbd0a1b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "74ecdba78052a5c550a02dd06286b173dca9c82cfde094ae3398ba8bbcbd0a1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "74ecdba78052a5c550a02dd06286b173dca9c82cfde094ae3398ba8bbcbd0a1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74ecdba78052a5c550a02dd06286b173dca9c82cfde094ae3398ba8bbcbd0a1b", kill_on_drop: false }`
[INFO] [stdout] 74ecdba78052a5c550a02dd06286b173dca9c82cfde094ae3398ba8bbcbd0a1b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e184ef8a2b44c3465245ff33713ebbb42ef3ebb32f0e80af39d1a05c3a8c22a4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e184ef8a2b44c3465245ff33713ebbb42ef3ebb32f0e80af39d1a05c3a8c22a4", kill_on_drop: false }`
[INFO] [stderr]     Checking lunatic v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `forget`
[INFO] [stdout]  --> src/channel.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::mem::{forget, transmute};
[INFO] [stdout]   |                ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `forget`
[INFO] [stdout]  --> src/channel.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::mem::{forget, transmute};
[INFO] [stdout]   |                ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]   --> src/lib.rs:66:13
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn drop(id: u32) {
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]   --> src/lib.rs:66:13
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn drop(id: u32) {
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `Command { std: "docker" "inspect" "e184ef8a2b44c3465245ff33713ebbb42ef3ebb32f0e80af39d1a05c3a8c22a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e184ef8a2b44c3465245ff33713ebbb42ef3ebb32f0e80af39d1a05c3a8c22a4", kill_on_drop: false }`
[INFO] [stdout] e184ef8a2b44c3465245ff33713ebbb42ef3ebb32f0e80af39d1a05c3a8c22a4