[INFO] fetching crate lexgen 0.5.0...
[INFO] checking lexgen-0.5.0 against beta-2021-10-15 for beta-1.56-3
[INFO] extracting crate lexgen 0.5.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate lexgen 0.5.0 on toolchain beta-2021-10-15
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lexgen 0.5.0
[INFO] finished tweaking crates.io crate lexgen 0.5.0
[INFO] tweaked toml for crates.io crate lexgen 0.5.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 504bd95d046396f827e5e6149b7c1540d319f9f72b7ab90e49af4d6b68cbc9b3
[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" "504bd95d046396f827e5e6149b7c1540d319f9f72b7ab90e49af4d6b68cbc9b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "504bd95d046396f827e5e6149b7c1540d319f9f72b7ab90e49af4d6b68cbc9b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "504bd95d046396f827e5e6149b7c1540d319f9f72b7ab90e49af4d6b68cbc9b3", kill_on_drop: false }`
[INFO] [stdout] 504bd95d046396f827e5e6149b7c1540d319f9f72b7ab90e49af4d6b68cbc9b3
[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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1558a0c9ddf1e8e17dd8076c4bb0a8c6fc5170e1e5e4b6e5c7395c26b15d424c
[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" "1558a0c9ddf1e8e17dd8076c4bb0a8c6fc5170e1e5e4b6e5c7395c26b15d424c", kill_on_drop: false }`
[INFO] [stderr]     Checking syn v1.0.80
[INFO] [stderr]    Compiling lexgen v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `ignore_pos`
[INFO] [stdout]    --> benches/../tests/lua_5_1.rs:385:4
[INFO] [stdout]     |
[INFO] [stdout] 385 | fn ignore_pos<A, E>(ret: Option<Result<(usize, A, usize), E>>) -> Option<Result<A, E>> {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: path statement drops value
[INFO] [stdout]   --> benches/benchmarks.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |         next;
[INFO] [stdout]    |         ^^^^^ help: use `drop` to clarify the intent: `drop(next);`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(path_statements)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> benches/benchmarks.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |         next;
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.58s
[INFO] running `Command { std: "docker" "inspect" "1558a0c9ddf1e8e17dd8076c4bb0a8c6fc5170e1e5e4b6e5c7395c26b15d424c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1558a0c9ddf1e8e17dd8076c4bb0a8c6fc5170e1e5e4b6e5c7395c26b15d424c", kill_on_drop: false }`
[INFO] [stdout] 1558a0c9ddf1e8e17dd8076c4bb0a8c6fc5170e1e5e4b6e5c7395c26b15d424c
