[INFO] fetching crate oxlex 0.1.0...
[INFO] checking oxlex-0.1.0 against beta for pr-78714
[INFO] extracting crate oxlex 0.1.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate oxlex 0.1.0 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 oxlex 0.1.0
[INFO] finished tweaking crates.io crate oxlex 0.1.0
[INFO] tweaked toml for crates.io crate oxlex 0.1.0 written to /workspace/builds/worker-12/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] ecaba2f9191a7b97cb05969d2204a359dbc0f140b7b12c99af9e318e53e2cadb
[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" "ecaba2f9191a7b97cb05969d2204a359dbc0f140b7b12c99af9e318e53e2cadb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ecaba2f9191a7b97cb05969d2204a359dbc0f140b7b12c99af9e318e53e2cadb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecaba2f9191a7b97cb05969d2204a359dbc0f140b7b12c99af9e318e53e2cadb", kill_on_drop: false }`
[INFO] [stdout] ecaba2f9191a7b97cb05969d2204a359dbc0f140b7b12c99af9e318e53e2cadb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] [stdout] d3c83f1782cda51246db8dc9a383372ce77a851f69ab63888636ac97b7faebba
[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" "d3c83f1782cda51246db8dc9a383372ce77a851f69ab63888636ac97b7faebba", kill_on_drop: false }`
[INFO] [stderr]    Compiling oxlex-derive v0.1.0
[INFO] [stderr]     Checking oxlex v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]   --> src/lexer.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |         HashSet
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]   --> src/lexable.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |         HashSet
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]   --> src/lexer.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |         HashSet
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]   --> src/lexable.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |         HashSet
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/test/lexer.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |     let mut lexer = Token::lexer(code);
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/test/lexer.rs:231:9
[INFO] [stdout]     |
[INFO] [stdout] 231 |     let mut lexer = Token::lexer(code);
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/test/lexer.rs:239:9
[INFO] [stdout]     |
[INFO] [stdout] 239 |     let mut lexer = Token::lexer(code);
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.17s
[INFO] running `Command { std: "docker" "inspect" "d3c83f1782cda51246db8dc9a383372ce77a851f69ab63888636ac97b7faebba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3c83f1782cda51246db8dc9a383372ce77a851f69ab63888636ac97b7faebba", kill_on_drop: false }`
[INFO] [stdout] d3c83f1782cda51246db8dc9a383372ce77a851f69ab63888636ac97b7faebba