[INFO] fetching crate polars-core 0.13.3...
[INFO] checking polars-core-0.13.3 against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] extracting crate polars-core 0.13.3 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate polars-core 0.13.3 on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate polars-core 0.13.3
[INFO] finished tweaking crates.io crate polars-core 0.13.3
[INFO] tweaked toml for crates.io crate polars-core 0.13.3 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "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" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ndarray v0.13.1
[INFO] [stderr]   Downloaded comfy-table v1.6.0
[INFO] [stderr]   Downloaded packed_simd_2 v0.3.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 667f0a350bfcb8cc3c750ba21140515d202d764125db19f908dbfb99306e2b52
[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" "667f0a350bfcb8cc3c750ba21140515d202d764125db19f908dbfb99306e2b52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "667f0a350bfcb8cc3c750ba21140515d202d764125db19f908dbfb99306e2b52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "667f0a350bfcb8cc3c750ba21140515d202d764125db19f908dbfb99306e2b52", kill_on_drop: false }`
[INFO] [stdout] 667f0a350bfcb8cc3c750ba21140515d202d764125db19f908dbfb99306e2b52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] efc3ac12ee4c99f8bb1db902b8924ea7cd4dab86e9cb0fb7fc3b2119524a8dd9
[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" "efc3ac12ee4c99f8bb1db902b8924ea7cd4dab86e9cb0fb7fc3b2119524a8dd9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]     Checking unsafe_unwrap v0.1.0
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]    Compiling ahash v0.7.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling crossbeam-utils v0.8.4
[INFO] [stderr]    Compiling memoffset v0.6.3
[INFO] [stderr]    Compiling num-bigint v0.3.2
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-bigint v0.4.0
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]     Checking lexical-core v0.7.6
[INFO] [stderr]     Checking crossbeam-epoch v0.9.4
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking getrandom v0.2.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking num-complex v0.3.1
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[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]     Checking num v0.3.1
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking thiserror v1.0.24
[INFO] [stderr]     Checking flatbuffers v0.8.4
[INFO] [stderr]     Checking arrow v4.0.0
[INFO] [stderr]     Checking polars-arrow v0.13.3
[INFO] [stderr]     Checking polars-core v0.13.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `max_n_rows`
[INFO] [stdout]    --> src/fmt.rs:371:13
[INFO] [stdout]     |
[INFO] [stdout] 371 |         let max_n_rows = std::env::var("POLARS_FMT_MAX_ROWS")
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_max_n_rows`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `max_n_rows`
[INFO] [stdout]    --> src/fmt.rs:371:13
[INFO] [stdout]     |
[INFO] [stdout] 371 |         let max_n_rows = std::env::var("POLARS_FMT_MAX_ROWS")
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_max_n_rows`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `prepare_row`
[INFO] [stdout]    --> src/fmt.rs:332:4
[INFO] [stdout]     |
[INFO] [stdout] 332 | fn prepare_row(row: Vec<AnyValue>, n_first: usize, n_last: usize) -> Vec<String> {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `prepare_row`
[INFO] [stdout]    --> src/fmt.rs:332:4
[INFO] [stdout]     |
[INFO] [stdout] 332 | fn prepare_row(row: Vec<AnyValue>, n_first: usize, n_last: usize) -> Vec<String> {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` 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 1m 25s
[INFO] running `Command { std: "docker" "inspect" "efc3ac12ee4c99f8bb1db902b8924ea7cd4dab86e9cb0fb7fc3b2119524a8dd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efc3ac12ee4c99f8bb1db902b8924ea7cd4dab86e9cb0fb7fc3b2119524a8dd9", kill_on_drop: false }`
[INFO] [stdout] efc3ac12ee4c99f8bb1db902b8924ea7cd4dab86e9cb0fb7fc3b2119524a8dd9