[INFO] fetching crate polars-core 0.14.6...
[INFO] testing polars-core-0.14.6 against master#432e145bd5a974c5b6f4dd9b352891bd7502b69d for pr-87041
[INFO] extracting crate polars-core 0.14.6 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate polars-core 0.14.6 on toolchain 432e145bd5a974c5b6f4dd9b352891bd7502b69d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate polars-core 0.14.6
[INFO] finished tweaking crates.io crate polars-core 0.14.6
[INFO] tweaked toml for crates.io crate polars-core 0.14.6 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--no-deps" "--format-version=1", 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] cb60cb66f606337ad1cfb12dfc5160cbc40190b3746ac70c61fca1c1e782c3fa
[INFO] running `Command { std: "docker" "start" "-a" "cb60cb66f606337ad1cfb12dfc5160cbc40190b3746ac70c61fca1c1e782c3fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb60cb66f606337ad1cfb12dfc5160cbc40190b3746ac70c61fca1c1e782c3fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb60cb66f606337ad1cfb12dfc5160cbc40190b3746ac70c61fca1c1e782c3fa", kill_on_drop: false }`
[INFO] [stdout] cb60cb66f606337ad1cfb12dfc5160cbc40190b3746ac70c61fca1c1e782c3fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "build" "--frozen" "--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] 33e99a28d740da28b618311bf9fb5238fd5bc72dce65420ce367c4f8d0aae837
[INFO] running `Command { std: "docker" "start" "-a" "33e99a28d740da28b618311bf9fb5238fd5bc72dce65420ce367c4f8d0aae837", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling ahash v0.7.4
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling arrow v4.4.0
[INFO] [stderr]    Compiling polars-arrow v0.14.7
[INFO] [stderr]    Compiling polars-core v0.14.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `series::arithmetic::coerce_lhs_rhs`
[INFO] [stdout]   --> src/series/mod.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 | use crate::{series::arithmetic::coerce_lhs_rhs, POOL};
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `align_chunks_ternary`
[INFO] [stdout]    --> src/utils.rs:743:15
[INFO] [stdout]     |
[INFO] [stdout] 743 | pub(crate) fn align_chunks_ternary<'a, A, B, C>(
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ordering_other_columns`
[INFO] [stdout]    --> src/chunked_array/ops/sort.rs:297:4
[INFO] [stdout]     |
[INFO] [stdout] 297 | fn ordering_other_columns<'a>(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^
[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 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="chrono"' --cfg 'feature="default"' --cfg 'feature="docs"' --cfg 'feature="performant"' --cfg 'feature="private"' --cfg 'feature="regex"' --cfg 'feature="temporal"' -C metadata=fedc62548077ac81 -C extra-filename=-fedc62548077ac81 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern ahash=/opt/rustwide/target/debug/deps/libahash-be9ccb8303c4c7cc.rmeta --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-e183bb2174e494e4.rmeta --extern arrow=/opt/rustwide/target/debug/deps/libarrow-29d5ae9a3ecd41fb.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-52e2c462cdc55255.rmeta --extern hashbrown=/opt/rustwide/target/debug/deps/libhashbrown-84da3ceae77c3f13.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-78c60b588458e652.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-f67718dd40129317.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-53e815e433e271fe.rmeta --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-02aeb857270eb57b.rmeta --extern polars_arrow=/opt/rustwide/target/debug/deps/libpolars_arrow-00ac974dbcbcc9dd.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-ca6b2c9513b376c5.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-14edb7dff9ca13a5.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-bb9f074e7fbbf765.rmeta --extern unsafe_unwrap=/opt/rustwide/target/debug/deps/libunsafe_unwrap-cd612ae32ae7eacc.rmeta --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "33e99a28d740da28b618311bf9fb5238fd5bc72dce65420ce367c4f8d0aae837", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33e99a28d740da28b618311bf9fb5238fd5bc72dce65420ce367c4f8d0aae837", kill_on_drop: false }`
[INFO] [stdout] 33e99a28d740da28b618311bf9fb5238fd5bc72dce65420ce367c4f8d0aae837