[INFO] crate cgroups-fs 1.0.3 is already in cache
[INFO] extracting crate cgroups-fs 1.0.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/cgroups-fs/1.0.3
[INFO] extracting crate cgroups-fs 1.0.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cgroups-fs/1.0.3
[INFO] validating manifest of cgroups-fs-1.0.3 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of cgroups-fs-1.0.3 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing cgroups-fs-1.0.3
[INFO] finished frobbing cgroups-fs-1.0.3
[INFO] frobbed toml for cgroups-fs-1.0.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/cgroups-fs/1.0.3/Cargo.toml
[INFO] started frobbing cgroups-fs-1.0.3
[INFO] finished frobbing cgroups-fs-1.0.3
[INFO] frobbed toml for cgroups-fs-1.0.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cgroups-fs/1.0.3/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing cgroups-fs-1.0.3 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/cgroups-fs/1.0.3:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 7007b83c0b13c1579ac47f551843412492b30d7f530a6b87e82bda28bf739938
[INFO] running `"docker" "start" "-a" "7007b83c0b13c1579ac47f551843412492b30d7f530a6b87e82bda28bf739938"`
[INFO] [stderr]    Compiling nix v0.13.1
[INFO] [stderr]    Compiling cgroups-fs v1.0.3 (/opt/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'std::os::unix::process::CommandExt::before_exec': should be unsafe, use `pre_exec` instead
[INFO] [stderr]    --> src/lib.rs:337:14
[INFO] [stderr]     |
[INFO] [stderr] 337 |         self.before_exec(move || {
[INFO] [stderr]     |              ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/lib.rs:278:13
[INFO] [stderr]     |
[INFO] [stderr] 278 |             inner.remove().is_ok();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.82s
[INFO] running `"docker" "inspect" "7007b83c0b13c1579ac47f551843412492b30d7f530a6b87e82bda28bf739938"`
[INFO] running `"docker" "rm" "-f" "7007b83c0b13c1579ac47f551843412492b30d7f530a6b87e82bda28bf739938"`
[INFO] [stdout] 7007b83c0b13c1579ac47f551843412492b30d7f530a6b87e82bda28bf739938
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/cgroups-fs/1.0.3:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 145dad2a7c89492b0f7bf2b1fede11614079486483c1d4ec60b75ec8b3ce2257
[INFO] running `"docker" "start" "-a" "145dad2a7c89492b0f7bf2b1fede11614079486483c1d4ec60b75ec8b3ce2257"`
[INFO] [stderr]    Compiling cgroups-fs v1.0.3 (/opt/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'std::os::unix::process::CommandExt::before_exec': should be unsafe, use `pre_exec` instead
[INFO] [stderr]    --> src/lib.rs:337:14
[INFO] [stderr]     |
[INFO] [stderr] 337 |         self.before_exec(move || {
[INFO] [stderr]     |              ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/lib.rs:278:13
[INFO] [stderr]     |
[INFO] [stderr] 278 |             inner.remove().is_ok();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `"docker" "inspect" "145dad2a7c89492b0f7bf2b1fede11614079486483c1d4ec60b75ec8b3ce2257"`
[INFO] running `"docker" "rm" "-f" "145dad2a7c89492b0f7bf2b1fede11614079486483c1d4ec60b75ec8b3ce2257"`
[INFO] [stdout] 145dad2a7c89492b0f7bf2b1fede11614079486483c1d4ec60b75ec8b3ce2257
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/cgroups-fs/1.0.3:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 061f5c446b65e1ddbedc180a80d0b3a0a5582f638e0ca13f8c91901fda9d7ef2
[INFO] running `"docker" "start" "-a" "061f5c446b65e1ddbedc180a80d0b3a0a5582f638e0ca13f8c91901fda9d7ef2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/cgroups_fs-e0982512998c9957
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests cgroups-fs
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - std::process::Command::cgroups (line 316) ... ok
[INFO] [stdout] test src/lib.rs -  (line 8) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "061f5c446b65e1ddbedc180a80d0b3a0a5582f638e0ca13f8c91901fda9d7ef2"`
[INFO] running `"docker" "rm" "-f" "061f5c446b65e1ddbedc180a80d0b3a0a5582f638e0ca13f8c91901fda9d7ef2"`
[INFO] [stdout] 061f5c446b65e1ddbedc180a80d0b3a0a5582f638e0ca13f8c91901fda9d7ef2