[INFO] fetching crate dataset-writer 1.2.0...
[INFO] testing dataset-writer-1.2.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate dataset-writer 1.2.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate dataset-writer 1.2.0
[INFO] finished tweaking crates.io crate dataset-writer 1.2.0
[INFO] tweaked toml for crates.io crate dataset-writer 1.2.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate dataset-writer 1.2.0 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate dataset-writer 1.2.0 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" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e315bf541be14db2f59a2204f35400959e96a0064af1f2e21147d357b3d3fe07
[INFO] running `Command { std: "docker" "start" "-a" "e315bf541be14db2f59a2204f35400959e96a0064af1f2e21147d357b3d3fe07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e315bf541be14db2f59a2204f35400959e96a0064af1f2e21147d357b3d3fe07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e315bf541be14db2f59a2204f35400959e96a0064af1f2e21147d357b3d3fe07", kill_on_drop: false }`
[INFO] [stdout] e315bf541be14db2f59a2204f35400959e96a0064af1f2e21147d357b3d3fe07
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a9953695dd6828d83d78695c2052c36a5f5135ed96aab9850b6e88165ba60daf
[INFO] running `Command { std: "docker" "start" "-a" "a9953695dd6828d83d78695c2052c36a5f5135ed96aab9850b6e88165ba60daf", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.15
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]    Compiling libc v0.2.174
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling cfg-if v1.0.1
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling zerocopy v0.8.26
[INFO] [stderr]    Compiling iana-time-zone v0.1.63
[INFO] [stderr]    Compiling once_cell v1.21.3
[INFO] [stderr]    Compiling hashbrown v0.15.4
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling memchr v2.7.5
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling zstd-safe v6.0.6
[INFO] [stderr]    Compiling lexical-util v1.0.6
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]    Compiling anyhow v1.0.98
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling thread_local v1.1.9
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling csv-core v0.1.12
[INFO] [stderr]    Compiling lexical-parse-integer v1.0.5
[INFO] [stderr]    Compiling lexical-write-integer v1.0.5
[INFO] [stderr]    Compiling lexical-parse-float v1.0.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling lexical-write-float v1.0.5
[INFO] [stderr]    Compiling crossbeam-deque v0.8.6
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling jobserver v0.1.33
[INFO] [stderr]    Compiling lexical-core v1.0.5
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling num-complex v0.4.6
[INFO] [stderr]    Compiling half v2.6.0
[INFO] [stderr]    Compiling chrono v0.4.41
[INFO] [stderr]    Compiling atoi v2.0.0
[INFO] [stderr]    Compiling cc v1.2.27
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling num-iter v0.1.45
[INFO] [stderr]    Compiling rayon v1.10.0
[INFO] [stderr]    Compiling zstd-sys v2.0.15+zstd.1.5.7
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling num-rational v0.4.2
[INFO] [stderr]    Compiling num v0.4.3
[INFO] [stderr]    Compiling arrow-buffer v55.2.0
[INFO] [stderr]    Compiling regex v1.11.1
[INFO] [stderr]    Compiling zstd v0.12.4
[INFO] [stderr]    Compiling arrow-schema v55.2.0
[INFO] [stderr]    Compiling csv v1.3.1
[INFO] [stderr]    Compiling arrow-data v55.2.0
[INFO] [stderr]    Compiling arrow-array v55.2.0
[INFO] [stderr]    Compiling arrow-select v55.2.0
[INFO] [stderr]    Compiling arrow-row v55.2.0
[INFO] [stderr]    Compiling arrow-arith v55.2.0
[INFO] [stderr]    Compiling arrow-cast v55.2.0
[INFO] [stderr]    Compiling arrow-ord v55.2.0
[INFO] [stderr]    Compiling arrow-string v55.2.0
[INFO] [stderr]    Compiling arrow-csv v55.2.0
[INFO] [stderr]    Compiling arrow v55.2.0
[INFO] [stderr]    Compiling dataset-writer v1.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:112:30
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub fn get_thread_writer(&self) -> Result<RefMut<W>> {
[INFO] [stdout]     |                              ^^^^^            ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub fn get_thread_writer(&self) -> Result<RefMut<'_, W>> {
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 42.76s
[INFO] running `Command { std: "docker" "inspect" "a9953695dd6828d83d78695c2052c36a5f5135ed96aab9850b6e88165ba60daf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9953695dd6828d83d78695c2052c36a5f5135ed96aab9850b6e88165ba60daf", kill_on_drop: false }`
[INFO] [stdout] a9953695dd6828d83d78695c2052c36a5f5135ed96aab9850b6e88165ba60daf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ecd4bd0c1f736cc76eec755da83acc1d50b91833114a91d0b632df5a58befb7a
[INFO] running `Command { std: "docker" "start" "-a" "ecd4bd0c1f736cc76eec755da83acc1d50b91833114a91d0b632df5a58befb7a", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustix v1.0.7
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]    Compiling bitflags v2.9.1
[INFO] [stderr]    Compiling arrow-array v55.2.0
[INFO] [stderr]    Compiling tempfile v3.20.0
[INFO] [stderr]    Compiling arrow-select v55.2.0
[INFO] [stderr]    Compiling arrow-arith v55.2.0
[INFO] [stderr]    Compiling arrow-row v55.2.0
[INFO] [stderr]    Compiling arrow-cast v55.2.0
[INFO] [stderr]    Compiling arrow-ord v55.2.0
[INFO] [stderr]    Compiling arrow-string v55.2.0
[INFO] [stderr]    Compiling arrow-csv v55.2.0
[INFO] [stderr]    Compiling arrow v55.2.0
[INFO] [stderr]    Compiling dataset-writer v1.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:112:30
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub fn get_thread_writer(&self) -> Result<RefMut<W>> {
[INFO] [stdout]     |                              ^^^^^            ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub fn get_thread_writer(&self) -> Result<RefMut<'_, W>> {
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:112:30
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub fn get_thread_writer(&self) -> Result<RefMut<W>> {
[INFO] [stdout]     |                              ^^^^^            ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub fn get_thread_writer(&self) -> Result<RefMut<'_, W>> {
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 25.32s
[INFO] running `Command { std: "docker" "inspect" "ecd4bd0c1f736cc76eec755da83acc1d50b91833114a91d0b632df5a58befb7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecd4bd0c1f736cc76eec755da83acc1d50b91833114a91d0b632df5a58befb7a", kill_on_drop: false }`
[INFO] [stdout] ecd4bd0c1f736cc76eec755da83acc1d50b91833114a91d0b632df5a58befb7a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d5ff490fa5d45d07c0353d9998077729ee3af4ed4b731b8368b515087de228cb
[INFO] running `Command { std: "docker" "start" "-a" "d5ff490fa5d45d07c0353d9998077729ee3af4ed4b731b8368b515087de228cb", kill_on_drop: false }`
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/lib.rs:112:30
[INFO] [stderr]     |
[INFO] [stderr] 112 |     pub fn get_thread_writer(&self) -> Result<RefMut<W>> {
[INFO] [stderr]     |                              ^^^^^            ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                              |
[INFO] [stderr]     |                              the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 112 |     pub fn get_thread_writer(&self) -> Result<RefMut<'_, W>> {
[INFO] [stderr]     |                                                      +++
[INFO] [stderr] 
[INFO] [stderr] warning: `dataset-writer` (lib) generated 1 warning (run `cargo fix --lib -p dataset-writer` to apply 1 suggestion)
[INFO] [stderr] warning: `dataset-writer` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/dataset_writer-d4a28cafdb6c9dc8)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests dataset_writer
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d5ff490fa5d45d07c0353d9998077729ee3af4ed4b731b8368b515087de228cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5ff490fa5d45d07c0353d9998077729ee3af4ed4b731b8368b515087de228cb", kill_on_drop: false }`
[INFO] [stdout] d5ff490fa5d45d07c0353d9998077729ee3af4ed4b731b8368b515087de228cb
