[INFO] fetching crate parquetry 0.18.0...
[INFO] checking parquetry-0.18.0 against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] extracting crate parquetry 0.18.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate parquetry 0.18.0
[INFO] finished tweaking crates.io crate parquetry 0.18.0
[INFO] tweaked toml for crates.io crate parquetry 0.18.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate parquetry 0.18.0 on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate parquetry 0.18.0 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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bb2f17d9b90a30bb169445736f1007f815a1991d54872f1a5d46009928d51bcc
[INFO] running `Command { std: "docker" "start" "-a" "bb2f17d9b90a30bb169445736f1007f815a1991d54872f1a5d46009928d51bcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bb2f17d9b90a30bb169445736f1007f815a1991d54872f1a5d46009928d51bcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb2f17d9b90a30bb169445736f1007f815a1991d54872f1a5d46009928d51bcc", kill_on_drop: false }`
[INFO] [stdout] bb2f17d9b90a30bb169445736f1007f815a1991d54872f1a5d46009928d51bcc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 99cb576e522314e0c11aefabbf0ab075d53cc19e0c618ea86fe96a99b69f5d2f
[INFO] running `Command { std: "docker" "start" "-a" "99cb576e522314e0c11aefabbf0ab075d53cc19e0c618ea86fe96a99b69f5d2f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]    Compiling semver v1.0.28
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]     Checking arrow-schema v58.2.0
[INFO] [stderr]     Checking once_cell v1.21.4
[INFO] [stderr]     Checking alloc-no-stdlib v2.0.4
[INFO] [stderr]     Checking bitflags v2.11.1
[INFO] [stderr]    Compiling snap v1.1.1
[INFO] [stderr]     Checking zlib-rs v0.6.3
[INFO] [stderr]     Checking integer-encoding v3.0.4
[INFO] [stderr]     Checking twox-hash v2.1.2
[INFO] [stderr]    Compiling thiserror-impl v2.0.18
[INFO] [stderr]     Checking base64 v0.22.1
[INFO] [stderr]     Checking alloc-stdlib v0.2.2
[INFO] [stderr]     Checking simdutf8 v0.1.5
[INFO] [stderr]    Compiling seq-macro v0.3.6
[INFO] [stderr]     Checking lz4_flex v0.13.0
[INFO] [stderr]     Checking brotli-decompressor v5.0.0
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling flatbuffers v25.12.19
[INFO] [stderr]     Checking brotli v8.0.2
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking half v2.7.1
[INFO] [stderr]     Checking chrono v0.4.44
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]     Checking ordered-float v2.10.1
[INFO] [stderr]     Checking thiserror v2.0.18
[INFO] [stderr]    Compiling jobserver v0.1.34
[INFO] [stderr]     Checking num-bigint v0.4.6
[INFO] [stderr]     Checking thrift v0.17.0
[INFO] [stderr]    Compiling cc v1.2.61
[INFO] [stderr]     Checking flate2 v1.1.9
[INFO] [stderr]     Checking arrow-buffer v58.2.0
[INFO] [stderr]    Compiling zstd-sys v2.0.16+zstd.1.5.7
[INFO] [stderr]     Checking arrow-data v58.2.0
[INFO] [stderr]     Checking arrow-array v58.2.0
[INFO] [stderr]     Checking arrow-select v58.2.0
[INFO] [stderr]    Compiling zstd-safe v7.2.4
[INFO] [stderr]     Checking arrow-ipc v58.2.0
[INFO] [stderr]     Checking zstd v0.13.3
[INFO] [stderr]     Checking parquet v58.2.0
[INFO] [stderr]     Checking parquetry v0.18.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `WriteConfig` is never constructed
[INFO] [stdout]  --> src/write.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct WriteConfig<T, S, F: Fn(&T) -> S> {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]   = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `WriteConfig` is never constructed
[INFO] [stdout]  --> src/write.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct WriteConfig<T, S, F: Fn(&T) -> S> {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]   = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `parquetry` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `parquetry` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "99cb576e522314e0c11aefabbf0ab075d53cc19e0c618ea86fe96a99b69f5d2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99cb576e522314e0c11aefabbf0ab075d53cc19e0c618ea86fe96a99b69f5d2f", kill_on_drop: false }`
[INFO] [stdout] 99cb576e522314e0c11aefabbf0ab075d53cc19e0c618ea86fe96a99b69f5d2f
