[INFO] fetching crate polars-io 0.15.0...
[INFO] testing polars-io-0.15.0 against 1.54.0 for beta-1.55-1
[INFO] extracting crate polars-io 0.15.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate polars-io 0.15.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate polars-io 0.15.0
[INFO] finished tweaking crates.io crate polars-io 0.15.0
[INFO] tweaked toml for crates.io crate polars-io 0.15.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] caa54ba3bf2d69d4d80002565e7e43ac74a91a1b394722451b8f8125be42eac0
[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" "caa54ba3bf2d69d4d80002565e7e43ac74a91a1b394722451b8f8125be42eac0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "caa54ba3bf2d69d4d80002565e7e43ac74a91a1b394722451b8f8125be42eac0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "caa54ba3bf2d69d4d80002565e7e43ac74a91a1b394722451b8f8125be42eac0", kill_on_drop: false }`
[INFO] [stdout] caa54ba3bf2d69d4d80002565e7e43ac74a91a1b394722451b8f8125be42eac0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b82ae942710234bbaa184973d8c5638aa35ce6a31b861f71c02233a7de7f56d1
[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" "b82ae942710234bbaa184973d8c5638aa35ce6a31b861f71c02233a7de7f56d1", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling unsafe_unwrap v0.1.0
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling dirs-sys v0.3.6
[INFO] [stderr]    Compiling dirs v3.0.2
[INFO] [stderr]    Compiling ahash v0.7.4
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling multiversion-macros v0.6.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling thiserror v1.0.26
[INFO] [stderr]    Compiling multiversion v0.6.1
[INFO] [stderr]    Compiling arrow v5.1.0
[INFO] [stderr]    Compiling polars-arrow v0.15.0
[INFO] [stderr]    Compiling polars-core v0.15.0
[INFO] [stderr]    Compiling polars-io v0.15.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `to_arrow_compatible_df`
[INFO] [stdout]  --> src/utils.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub(crate) fn to_arrow_compatible_df(df: &DataFrame) -> DataFrame {
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `resolve_homedir`
[INFO] [stdout]   --> src/utils.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn resolve_homedir(path: &Path) -> PathBuf {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `finish`
[INFO] [stdout]    --> src/lib.rs:178:19
[INFO] [stdout]     |
[INFO] [stdout] 178 |     pub(crate) fn finish(&self, df: &DataFrame) -> Result<Series> {
[INFO] [stdout]     |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `polars-core`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name polars_core --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/polars-core-0.15.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="private"' -C metadata=375734607e68856c -C extra-filename=-375734607e68856c --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern ahash=/opt/rustwide/target/debug/deps/libahash-8973895df80350d0.rmeta --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-d1e64256fbcc8ff8.rmeta --extern arrow=/opt/rustwide/target/debug/deps/libarrow-c0ca3b229b678055.rmeta --extern hashbrown=/opt/rustwide/target/debug/deps/libhashbrown-7c1112c91caa4c3b.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-6b844899321ff5c6.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-5c53d641eb010a81.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-a01a64bbfd6125dd.rmeta --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-69b489850d458ebd.rmeta --extern polars_arrow=/opt/rustwide/target/debug/deps/libpolars_arrow-f72b284ba7e65f59.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-4c1818fa32cde2c0.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-932e09e66b64548a.rmeta --extern unsafe_unwrap=/opt/rustwide/target/debug/deps/libunsafe_unwrap-8d5b6c6e0686bddb.rmeta --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "b82ae942710234bbaa184973d8c5638aa35ce6a31b861f71c02233a7de7f56d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b82ae942710234bbaa184973d8c5638aa35ce6a31b861f71c02233a7de7f56d1", kill_on_drop: false }`
[INFO] [stdout] b82ae942710234bbaa184973d8c5638aa35ce6a31b861f71c02233a7de7f56d1
