[INFO] fetching crate gherkin_rust 0.8.3...
[INFO] checking gherkin_rust-0.8.3 against beta for pr-78714
[INFO] extracting crate gherkin_rust 0.8.3 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate gherkin_rust 0.8.3 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 gherkin_rust 0.8.3
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate gherkin_rust 0.8.3
[INFO] tweaked toml for crates.io crate gherkin_rust 0.8.3 written to /workspace/builds/worker-3/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] [stderr]     Blocking waiting for file lock on package cache
[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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 38854ae2c922934c5eadf4817d748caa37a4f11a200ebbf86278482754e5e123
[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" "38854ae2c922934c5eadf4817d748caa37a4f11a200ebbf86278482754e5e123", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38854ae2c922934c5eadf4817d748caa37a4f11a200ebbf86278482754e5e123", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38854ae2c922934c5eadf4817d748caa37a4f11a200ebbf86278482754e5e123", kill_on_drop: false }`
[INFO] [stdout] 38854ae2c922934c5eadf4817d748caa37a4f11a200ebbf86278482754e5e123
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d0d396e865d7b1eee83f04cc73e1f937ad0af6bfc4f5f39dc097e17219d62ecd
[INFO] running `Command { std: "docker" "start" "-a" "d0d396e865d7b1eee83f04cc73e1f937ad0af6bfc4f5f39dc097e17219d62ecd", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]     Checking futures-core v0.3.8
[INFO] [stderr]    Compiling peg-runtime v0.6.3
[INFO] [stderr]     Checking pathdiff v0.2.0
[INFO] [stderr]     Checking shh v1.0.1
[INFO] [stderr]     Checking textwrap v0.12.1
[INFO] [stderr]     Checking ignore v0.4.16
[INFO] [stderr]     Checking futures-channel v0.3.8
[INFO] [stderr]    Compiling peg-macros v0.6.3
[INFO] [stderr]     Checking globwalk v0.8.0
[INFO] [stderr]     Checking peg v0.6.3
[INFO] [stderr]    Compiling pin-project-internal v1.0.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]    Compiling futures-macro v0.3.8
[INFO] [stderr]    Compiling typed-builder v0.7.0
[INFO] [stderr]    Compiling async-stream-impl v0.3.0
[INFO] [stderr]    Compiling async-trait v0.1.41
[INFO] [stderr]    Compiling cute_custom_default v2.1.0
[INFO] [stderr]     Checking async-stream v0.3.0
[INFO] [stderr]     Checking thiserror v1.0.22
[INFO] [stderr]     Checking gherkin_rust v0.8.3
[INFO] [stderr]     Checking gherkin_rust v0.8.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking pin-project v1.0.1
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking futures-executor v0.3.8
[INFO] [stderr]     Checking futures v0.3.8
[INFO] [stderr]     Checking cucumber_rust v0.7.3
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> tests/cucumber.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let mut builder: Steps<crate::MyWorld> = Steps::new();
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` 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 43.71s
[INFO] running `Command { std: "docker" "inspect" "d0d396e865d7b1eee83f04cc73e1f937ad0af6bfc4f5f39dc097e17219d62ecd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0d396e865d7b1eee83f04cc73e1f937ad0af6bfc4f5f39dc097e17219d62ecd", kill_on_drop: false }`
[INFO] [stdout] d0d396e865d7b1eee83f04cc73e1f937ad0af6bfc4f5f39dc097e17219d62ecd