[INFO] crate libmount-sys 0.1.0 is already in cache
[INFO] checking libmount-sys-0.1.0 against master#bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc for pr-70917
[INFO] extracting crate libmount-sys 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate libmount-sys 0.1.0 on toolchain bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 23abafb99ae013dda80e8cefcac7057b9d825edc7cfb1c872d195751da9d22b7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "23abafb99ae013dda80e8cefcac7057b9d825edc7cfb1c872d195751da9d22b7"`
[INFO] [stderr]    Compiling libmount-sys v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::io::Write`
[INFO] [stderr]  --> build.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::Write;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `cdir`
[INFO] [stderr]  --> build.rs:7:7
[INFO] [stderr]   |
[INFO] [stderr] 7 |   let cdir = std::env::current_dir().unwrap();
[INFO] [stderr]   |       ^^^^ help: if this is intentional, prefix it with an underscore: `_cdir`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: failed to run custom build command for `libmount-sys v0.1.0 (/opt/rustwide/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/libmount-sys-34d24929ed75c436/build-script-build` (exit code: 1)
[INFO] [stderr] --- stderr
[INFO] [stderr] pkg_config mount failed: `"pkg-config" "--libs" "--cflags" "mount"` did not exit successfully: exit code: 1
[INFO] [stderr] --- stderr
[INFO] [stderr] Package mount was not found in the pkg-config search path.
[INFO] [stderr] Perhaps you should add the directory containing `mount.pc'
[INFO] [stderr] to the PKG_CONFIG_PATH environment variable
[INFO] [stderr] No package 'mount' found
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] running `"docker" "inspect" "23abafb99ae013dda80e8cefcac7057b9d825edc7cfb1c872d195751da9d22b7"`
[INFO] running `"docker" "rm" "-f" "23abafb99ae013dda80e8cefcac7057b9d825edc7cfb1c872d195751da9d22b7"`
[INFO] [stdout] 23abafb99ae013dda80e8cefcac7057b9d825edc7cfb1c872d195751da9d22b7
