[INFO] fetching crate libmount-sys 0.1.0...
[INFO] checking libmount-sys-0.1.0 against try#169954edd744527414c631e9af1bbdc537b0cdf2 for pr-75192
[INFO] extracting crate libmount-sys 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate libmount-sys 0.1.0 on toolchain 169954edd744527414c631e9af1bbdc537b0cdf2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate libmount-sys 0.1.0
[INFO] finished tweaking crates.io crate libmount-sys 0.1.0
[INFO] tweaked toml for crates.io crate libmount-sys 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98462e8a95076f1cb463fcecb7b0a8abb357d4f5a7e7c40c370cf57f3454f27a
[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" "98462e8a95076f1cb463fcecb7b0a8abb357d4f5a7e7c40c370cf57f3454f27a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98462e8a95076f1cb463fcecb7b0a8abb357d4f5a7e7c40c370cf57f3454f27a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98462e8a95076f1cb463fcecb7b0a8abb357d4f5a7e7c40c370cf57f3454f27a", kill_on_drop: false }`
[INFO] [stdout] 98462e8a95076f1cb463fcecb7b0a8abb357d4f5a7e7c40c370cf57f3454f27a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "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] 7fbfca38019390bb2a33c8ed2c23a8c0617fed0ae48fc7b76a0a9b7d56bb262b
[INFO] running `Command { std: "docker" "start" "-a" "7fbfca38019390bb2a33c8ed2c23a8c0617fed0ae48fc7b76a0a9b7d56bb262b", kill_on_drop: false }`
[INFO] [stderr]    Compiling clang-sys v0.28.1
[INFO] [stderr]    Compiling backtrace v0.3.50
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling bindgen v0.49.4
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling which v2.0.1
[INFO] [stderr]    Compiling cexpr v0.3.6
[INFO] [stderr]    Compiling libmount-sys v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> build.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cdir`
[INFO] [stdout]  --> build.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 |   let cdir = std::env::current_dir().unwrap();
[INFO] [stdout]   |       ^^^^ help: if this is intentional, prefix it with an underscore: `_cdir`
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 45.51s
[INFO] running `Command { std: "docker" "inspect" "7fbfca38019390bb2a33c8ed2c23a8c0617fed0ae48fc7b76a0a9b7d56bb262b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fbfca38019390bb2a33c8ed2c23a8c0617fed0ae48fc7b76a0a9b7d56bb262b", kill_on_drop: false }`
[INFO] [stdout] 7fbfca38019390bb2a33c8ed2c23a8c0617fed0ae48fc7b76a0a9b7d56bb262b