[INFO] fetching crate parallel-iterator 0.1.6...
[INFO] testing parallel-iterator-0.1.6 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate parallel-iterator 0.1.6 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate parallel-iterator 0.1.6
[INFO] finished tweaking crates.io crate parallel-iterator 0.1.6
[INFO] tweaked toml for crates.io crate parallel-iterator 0.1.6 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate parallel-iterator 0.1.6 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate parallel-iterator 0.1.6 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-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[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" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d829001409253327ba6192debbe49b9a4231dcc90539577a2afe219a9fd5db38
[INFO] running `Command { std: "docker" "start" "-a" "d829001409253327ba6192debbe49b9a4231dcc90539577a2afe219a9fd5db38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d829001409253327ba6192debbe49b9a4231dcc90539577a2afe219a9fd5db38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d829001409253327ba6192debbe49b9a4231dcc90539577a2afe219a9fd5db38", kill_on_drop: false }`
[INFO] [stdout] d829001409253327ba6192debbe49b9a4231dcc90539577a2afe219a9fd5db38
[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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 96505717d33332295647a74c1982c1361fb57807a778669bae2b613377cb5f3f
[INFO] running `Command { std: "docker" "start" "-a" "96505717d33332295647a74c1982c1361fb57807a778669bae2b613377cb5f3f", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling libc v0.2.72
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling crossbeam-channel v0.4.2
[INFO] [stderr]    Compiling parallel-iterator v0.1.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.73s
[INFO] running `Command { std: "docker" "inspect" "96505717d33332295647a74c1982c1361fb57807a778669bae2b613377cb5f3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96505717d33332295647a74c1982c1361fb57807a778669bae2b613377cb5f3f", kill_on_drop: false }`
[INFO] [stdout] 96505717d33332295647a74c1982c1361fb57807a778669bae2b613377cb5f3f
[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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d7bc781828777efa7092901ce3d387384e55868864f92623b7b1f83fb0437943
[INFO] running `Command { std: "docker" "start" "-a" "d7bc781828777efa7092901ce3d387384e55868864f92623b7b1f83fb0437943", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling parallel-iterator v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]   --> examples/example_1.rs:10:39
[INFO] [stdout]    |
[INFO] [stdout] 10 |     for i in ParallelIterator::new(|| (0u32..100), || do_some_work) {
[INFO] [stdout]    |                                       ^         ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 10 -     for i in ParallelIterator::new(|| (0u32..100), || do_some_work) {
[INFO] [stdout] 10 +     for i in ParallelIterator::new(|| 0u32..100 , || do_some_work) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]   --> examples/example_2.rs:21:39
[INFO] [stdout]    |
[INFO] [stdout] 21 |     for i in ParallelIterator::new(|| (0..MAX), xform_ctor) {
[INFO] [stdout]    |                                       ^      ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 21 -     for i in ParallelIterator::new(|| (0..MAX), xform_ctor) {
[INFO] [stdout] 21 +     for i in ParallelIterator::new(|| 0..MAX , xform_ctor) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]    --> src/lib.rs:186:28
[INFO] [stdout]     |
[INFO] [stdout] 186 |         let prod_ctor = || (0u32..100);
[INFO] [stdout]     |                            ^         ^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:63:11
[INFO] [stdout]     |
[INFO] [stdout]  63 | #![forbid(warnings)]
[INFO] [stdout]     |           ^^^^^^^^
[INFO] [stdout]     = note: `#[warn(unused_parens)]` implied by `#[warn(warnings)]`
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 186 -         let prod_ctor = || (0u32..100);
[INFO] [stdout] 186 +         let prod_ctor = || 0u32..100;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.39s
[INFO] running `Command { std: "docker" "inspect" "d7bc781828777efa7092901ce3d387384e55868864f92623b7b1f83fb0437943", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7bc781828777efa7092901ce3d387384e55868864f92623b7b1f83fb0437943", kill_on_drop: false }`
[INFO] [stdout] d7bc781828777efa7092901ce3d387384e55868864f92623b7b1f83fb0437943
[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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d058d6e607a7934416475c11a0dfa60ca1bfef2c982707fb238a86400b31240d
[INFO] running `Command { std: "docker" "start" "-a" "d058d6e607a7934416475c11a0dfa60ca1bfef2c982707fb238a86400b31240d", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: unnecessary parentheses around closure body
[INFO] [stderr]    --> src/lib.rs:186:28
[INFO] [stderr]     |
[INFO] [stderr] 186 |         let prod_ctor = || (0u32..100);
[INFO] [stderr]     |                            ^         ^
[INFO] [stderr]     |
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]    --> src/lib.rs:63:11
[INFO] [stderr]     |
[INFO] [stderr]  63 | #![forbid(warnings)]
[INFO] [stderr]     |           ^^^^^^^^
[INFO] [stderr]     = note: `#[warn(unused_parens)]` implied by `#[warn(warnings)]`
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 186 -         let prod_ctor = || (0u32..100);
[INFO] [stderr] 186 +         let prod_ctor = || 0u32..100;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `parallel-iterator` (lib test) generated 1 warning (run `cargo fix --lib -p parallel-iterator --tests` to apply 1 suggestion)
[INFO] [stderr] warning: unnecessary parentheses around closure body
[INFO] [stderr]   --> examples/example_1.rs:10:39
[INFO] [stderr]    |
[INFO] [stderr] 10 |     for i in ParallelIterator::new(|| (0u32..100), || do_some_work) {
[INFO] [stderr]    |                                       ^         ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 10 -     for i in ParallelIterator::new(|| (0u32..100), || do_some_work) {
[INFO] [stderr] 10 +     for i in ParallelIterator::new(|| 0u32..100 , || do_some_work) {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around closure body
[INFO] [stderr]   --> examples/example_2.rs:21:39
[INFO] [stderr]    |
[INFO] [stderr] 21 |     for i in ParallelIterator::new(|| (0..MAX), xform_ctor) {
[INFO] [stderr]    |                                       ^      ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 21 -     for i in ParallelIterator::new(|| (0..MAX), xform_ctor) {
[INFO] [stderr] 21 +     for i in ParallelIterator::new(|| 0..MAX , xform_ctor) {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `parallel-iterator` (example "example_1") generated 1 warning (run `cargo fix --example "example_1" -p parallel-iterator` to apply 1 suggestion)
[INFO] [stderr] warning: `parallel-iterator` (example "example_2") generated 1 warning (run `cargo fix --example "example_2" -p parallel-iterator` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/parallel_iterator-c89ac32e14b8f99b)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_parallel_vs_sequential ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests parallel_iterator
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 9) ... ok
[INFO] [stdout] test src/lib.rs - (line 31) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d058d6e607a7934416475c11a0dfa60ca1bfef2c982707fb238a86400b31240d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d058d6e607a7934416475c11a0dfa60ca1bfef2c982707fb238a86400b31240d", kill_on_drop: false }`
[INFO] [stdout] d058d6e607a7934416475c11a0dfa60ca1bfef2c982707fb238a86400b31240d
