[INFO] cloning repository https://github.com/fimenten/parquet_db
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fimenten/parquet_db" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffimenten%2Fparquet_db", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffimenten%2Fparquet_db'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9ff08eb0b09c38249284cdf66d9adf8a4788d446
[INFO] checking fimenten/parquet_db against master#8f21a5c92ea55c348c275a1bc4fedbdf181e0d64 for pr-143011
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffimenten%2Fparquet_db" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/fimenten/parquet_db
[INFO] finished tweaking git repo https://github.com/fimenten/parquet_db
[INFO] tweaked toml for git repo https://github.com/fimenten/parquet_db written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/fimenten/parquet_db on toolchain 8f21a5c92ea55c348c275a1bc4fedbdf181e0d64
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/fimenten/parquet_db already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded polars-row v0.40.0
[INFO] [stderr]   Downloaded polars-error v0.40.0
[INFO] [stderr]   Downloaded polars-compute v0.40.0
[INFO] [stderr]   Downloaded polars-time v0.40.0
[INFO] [stderr]   Downloaded polars-utils v0.40.0
[INFO] [stderr]   Downloaded polars v0.40.0
[INFO] [stderr]   Downloaded polars-sql v0.40.0
[INFO] [stderr]   Downloaded polars-expr v0.40.0
[INFO] [stderr]   Downloaded polars-pipe v0.40.0
[INFO] [stderr]   Downloaded polars-lazy v0.40.0
[INFO] [stderr]   Downloaded polars-io v0.40.0
[INFO] [stderr]   Downloaded polars-ops v0.40.0
[INFO] [stderr]   Downloaded polars-parquet v0.40.0
[INFO] [stderr]   Downloaded polars-plan v0.40.0
[INFO] [stderr]   Downloaded polars-arrow v0.40.0
[INFO] [stderr]   Downloaded polars-core v0.40.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b3ee6cfa75604db57d5d4d837d1333a7f1c61fe76049db2255de78f757e0b1bf
[INFO] running `Command { std: "docker" "start" "-a" "b3ee6cfa75604db57d5d4d837d1333a7f1c61fe76049db2255de78f757e0b1bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b3ee6cfa75604db57d5d4d837d1333a7f1c61fe76049db2255de78f757e0b1bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3ee6cfa75604db57d5d4d837d1333a7f1c61fe76049db2255de78f757e0b1bf", kill_on_drop: false }`
[INFO] [stdout] b3ee6cfa75604db57d5d4d837d1333a7f1c61fe76049db2255de78f757e0b1bf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "f0258ecfb132cb7773916b2c710a5a7c19219ae0a4dbc90810864e8ca420d94a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling once_cell v1.19.0
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling libm v0.2.8
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]    Compiling serde v1.0.203
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]    Compiling target-features v0.1.6
[INFO] [stderr]     Checking either v1.12.0
[INFO] [stderr]    Compiling thiserror v1.0.61
[INFO] [stderr]     Checking array-init-cursor v0.2.0
[INFO] [stderr]     Checking bitflags v2.5.0
[INFO] [stderr]     Checking regex-syntax v0.8.4
[INFO] [stderr]     Checking zerocopy v0.7.34
[INFO] [stderr]     Checking planus v0.3.1
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking allocator-api2 v0.2.18
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking equivalent v1.0.1
[INFO] [stderr]     Checking iana-time-zone v0.1.60
[INFO] [stderr]     Checking simdutf8 v0.1.4
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]    Compiling smartstring v1.0.1
[INFO] [stderr]    Compiling polars-utils v0.40.0
[INFO] [stderr]    Compiling polars-arrow v0.40.0
[INFO] [stderr]     Checking raw-cpuid v11.0.2
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]     Checking dyn-clone v1.0.17
[INFO] [stderr]     Checking ethnum v1.5.0
[INFO] [stderr]     Checking foreign_vec v0.1.0
[INFO] [stderr]     Checking streaming-iterator v0.1.9
[INFO] [stderr]    Compiling pkg-config v0.3.30
[INFO] [stderr]     Checking strength_reduce v0.2.4
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking itoa v1.0.11
[INFO] [stderr]    Compiling rustversion v1.0.17
[INFO] [stderr]     Checking atoi_simd v0.15.6
[INFO] [stderr]     Checking ryu v1.0.18
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]     Checking fast-float v0.2.0
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling syn v2.0.67
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]    Compiling polars-compute v0.40.0
[INFO] [stderr]     Checking unicode-width v0.1.13
[INFO] [stderr]    Compiling heck v0.5.0
[INFO] [stderr]    Compiling polars-core v0.40.0
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]    Compiling zstd-safe v7.1.0
[INFO] [stderr]    Compiling jobserver v0.1.31
[INFO] [stderr]     Checking alloc-no-stdlib v2.0.4
[INFO] [stderr]     Checking strum v0.26.2
[INFO] [stderr]    Compiling cc v1.0.99
[INFO] [stderr]     Checking alloc-stdlib v0.2.2
[INFO] [stderr]    Compiling polars-ops v0.40.0
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]    Compiling snap v1.1.1
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking parking_lot v0.12.3
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[INFO] [stderr]     Checking miniz_oxide v0.7.3
[INFO] [stderr]     Checking brotli-decompressor v4.0.0
[INFO] [stderr]     Checking fallible-streaming-iterator v0.1.9
[INFO] [stderr]     Checking crossterm v0.27.0
[INFO] [stderr]     Checking parquet-format-safe v0.2.4
[INFO] [stderr]    Compiling seq-macro v0.3.5
[INFO] [stderr]     Checking streaming-decompression v0.1.2
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking base64 v0.22.1
[INFO] [stderr]     Checking memmap2 v0.7.1
[INFO] [stderr]     Checking flate2 v1.0.30
[INFO] [stderr]    Compiling polars-plan v0.40.0
[INFO] [stderr]     Checking home v0.5.9
[INFO] [stderr]     Checking percent-encoding v2.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking bytes v1.6.0
[INFO] [stderr]     Checking regex-automata v0.4.7
[INFO] [stderr]    Compiling polars-lazy v0.40.0
[INFO] [stderr]     Checking chrono v0.4.38
[INFO] [stderr]     Checking argminmax v0.6.2
[INFO] [stderr]     Checking atoi v2.0.0
[INFO] [stderr]    Compiling polars v0.40.0
[INFO] [stderr]     Checking glob v0.3.1
[INFO] [stderr]     Checking uuid v1.8.0
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking brotli v5.0.0
[INFO] [stderr]     Checking rand_distr v0.4.3
[INFO] [stderr]    Compiling psm v0.1.21
[INFO] [stderr]    Compiling stacker v0.1.15
[INFO] [stderr]    Compiling zstd-sys v2.0.11+zstd.1.5.6
[INFO] [stderr]    Compiling lz4-sys v1.9.5
[INFO] [stderr]     Checking now v0.1.3
[INFO] [stderr]     Checking regex v1.10.5
[INFO] [stderr]    Compiling serde_derive v1.0.203
[INFO] [stderr]    Compiling thiserror-impl v1.0.61
[INFO] [stderr]    Compiling bytemuck_derive v1.7.0
[INFO] [stderr]    Compiling strum_macros v0.26.4
[INFO] [stderr]    Compiling recursive-proc-macro-impl v0.1.1
[INFO] [stderr]    Compiling multiversion-macros v0.7.4
[INFO] [stderr]     Checking recursive v0.1.1
[INFO] [stderr]     Checking bytemuck v1.16.1
[INFO] [stderr]     Checking multiversion v0.7.4
[INFO] [stderr]     Checking comfy-table v7.1.1
[INFO] [stderr]     Checking zstd v0.13.1
[INFO] [stderr]     Checking polars-arrow-format v0.1.0
[INFO] [stderr]     Checking hashbrown v0.14.5
[INFO] [stderr]     Checking lz4 v1.25.0
[INFO] [stderr]     Checking indexmap v2.2.6
[INFO] [stderr]     Checking polars-error v0.40.0
[INFO] [stderr]     Checking polars-row v0.40.0
[INFO] [stderr]     Checking polars-parquet v0.40.0
[INFO] [stderr]     Checking polars-time v0.40.0
[INFO] [stderr]     Checking polars-io v0.40.0
[INFO] [stderr]     Checking polars-expr v0.40.0
[INFO] [stderr]     Checking parquet_db v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `io::Write` and `str::FromStr`
[INFO] [stdout]  --> src/main.rs:1:44
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{env, fs::{create_dir_all, File}, io::Write, str::FromStr};
[INFO] [stdout]   |                                            ^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `frame::row::Row`
[INFO] [stdout]  --> src/main.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 | use polars::{frame::row::Row, lazy::dsl::col, prelude::*};
[INFO] [stdout]   |              ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `io::Write` and `str::FromStr`
[INFO] [stdout]  --> src/main.rs:1:44
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{env, fs::{create_dir_all, File}, io::Write, str::FromStr};
[INFO] [stdout]   |                                            ^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `frame::row::Row`
[INFO] [stdout]  --> src/main.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 | use polars::{frame::row::Row, lazy::dsl::col, prelude::*};
[INFO] [stdout]   |              ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `parent_path` is never read
[INFO] [stdout]   --> src/main.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut parent_path = String::new();
[INFO] [stdout]    |             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `table_name` is never read
[INFO] [stdout]   --> src/main.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut table_name = String::new();
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `parent_path` is never read
[INFO] [stdout]   --> src/main.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut parent_path = String::new();
[INFO] [stdout]    |             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `table_name` is never read
[INFO] [stdout]   --> src/main.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut table_name = String::new();
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |             create_dir_all(index_path.parent().unwrap().clone());
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |             let _ = create_dir_all(index_path.parent().unwrap().clone());
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/main.rs:57:56
[INFO] [stdout]    |
[INFO] [stdout] 57 |             create_dir_all(index_path.parent().unwrap().clone());
[INFO] [stdout]    |                                                        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Path` does not implement `Clone`, so calling `clone` on `&Path` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 57 -             create_dir_all(index_path.parent().unwrap().clone());
[INFO] [stdout] 57 +             create_dir_all(index_path.parent().unwrap());
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |             ParquetWriter::new(w).finish(&mut df);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 59 |             let _ = ParquetWriter::new(w).finish(&mut df);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:65:17
[INFO] [stdout]    |
[INFO] [stdout] 65 |                 ParquetWriter::new(w).finish(&mut df);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 65 |                 let _ = ParquetWriter::new(w).finish(&mut df);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |             create_dir_all(index_path.parent().unwrap().clone());
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |             let _ = create_dir_all(index_path.parent().unwrap().clone());
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/main.rs:57:56
[INFO] [stdout]    |
[INFO] [stdout] 57 |             create_dir_all(index_path.parent().unwrap().clone());
[INFO] [stdout]    |                                                        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Path` does not implement `Clone`, so calling `clone` on `&Path` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 57 -             create_dir_all(index_path.parent().unwrap().clone());
[INFO] [stdout] 57 +             create_dir_all(index_path.parent().unwrap());
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |             ParquetWriter::new(w).finish(&mut df);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 59 |             let _ = ParquetWriter::new(w).finish(&mut df);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:65:17
[INFO] [stdout]    |
[INFO] [stdout] 65 |                 ParquetWriter::new(w).finish(&mut df);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 65 |                 let _ = ParquetWriter::new(w).finish(&mut df);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 53.15s
[INFO] running `Command { std: "docker" "inspect" "f0258ecfb132cb7773916b2c710a5a7c19219ae0a4dbc90810864e8ca420d94a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0258ecfb132cb7773916b2c710a5a7c19219ae0a4dbc90810864e8ca420d94a", kill_on_drop: false }`
[INFO] [stdout] f0258ecfb132cb7773916b2c710a5a7c19219ae0a4dbc90810864e8ca420d94a
