[INFO] fetching crate palindromeda 2.1.0...
[INFO] testing palindromeda-2.1.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate palindromeda 2.1.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate palindromeda 2.1.0
[INFO] finished tweaking crates.io crate palindromeda 2.1.0
[INFO] tweaked toml for crates.io crate palindromeda 2.1.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate palindromeda 2.1.0 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 palindromeda 2.1.0 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-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 4b6a955daf3aca66ace89012b2e7db22d1915819153b2d06e60a15c18d57aa8b
[INFO] running `Command { std: "docker" "start" "-a" "4b6a955daf3aca66ace89012b2e7db22d1915819153b2d06e60a15c18d57aa8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b6a955daf3aca66ace89012b2e7db22d1915819153b2d06e60a15c18d57aa8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b6a955daf3aca66ace89012b2e7db22d1915819153b2d06e60a15c18d57aa8b", kill_on_drop: false }`
[INFO] [stdout] 4b6a955daf3aca66ace89012b2e7db22d1915819153b2d06e60a15c18d57aa8b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] cca99de8f617aa37cd1a199c6630b6f29c6001ec6ac2bf6bfe1de220d523361e
[INFO] running `Command { std: "docker" "start" "-a" "cca99de8f617aa37cd1a199c6630b6f29c6001ec6ac2bf6bfe1de220d523361e", kill_on_drop: false }`
[INFO] [stderr]    Compiling forward_ref v1.0.0
[INFO] [stderr]    Compiling palindromeda v2.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function `from` is never used
[INFO] [stdout]   --> src/lib.rs:87:14
[INFO] [stdout]    |
[INFO] [stdout] 82 | impl PalindromeDigits {
[INFO] [stdout]    | --------------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 87 |     const fn from(mut x: u64) -> Self {
[INFO] [stdout]    |              ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "cca99de8f617aa37cd1a199c6630b6f29c6001ec6ac2bf6bfe1de220d523361e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cca99de8f617aa37cd1a199c6630b6f29c6001ec6ac2bf6bfe1de220d523361e", kill_on_drop: false }`
[INFO] [stdout] cca99de8f617aa37cd1a199c6630b6f29c6001ec6ac2bf6bfe1de220d523361e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 5ef978577cf47c8e786ff9f8a3201e86f07b377e1b12443e8fd494294e771133
[INFO] running `Command { std: "docker" "start" "-a" "5ef978577cf47c8e786ff9f8a3201e86f07b377e1b12443e8fd494294e771133", kill_on_drop: false }`
[INFO] [stderr]    Compiling palindromeda v2.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function `from` is never used
[INFO] [stdout]   --> src/lib.rs:87:14
[INFO] [stdout]    |
[INFO] [stdout] 82 | impl PalindromeDigits {
[INFO] [stdout]    | --------------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 87 |     const fn from(mut x: u64) -> Self {
[INFO] [stdout]    |              ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `Command { std: "docker" "inspect" "5ef978577cf47c8e786ff9f8a3201e86f07b377e1b12443e8fd494294e771133", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ef978577cf47c8e786ff9f8a3201e86f07b377e1b12443e8fd494294e771133", kill_on_drop: false }`
[INFO] [stdout] 5ef978577cf47c8e786ff9f8a3201e86f07b377e1b12443e8fd494294e771133
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 189bc8c95ffd571f68986fa9862fdad097fe9af4ae59e1a793511c5157f83a3d
[INFO] running `Command { std: "docker" "start" "-a" "189bc8c95ffd571f68986fa9862fdad097fe9af4ae59e1a793511c5157f83a3d", kill_on_drop: false }`
[INFO] [stderr] warning: associated function `from` is never used
[INFO] [stderr]   --> src/lib.rs:87:14
[INFO] [stderr]    |
[INFO] [stderr] 82 | impl PalindromeDigits {
[INFO] [stderr]    | --------------------- associated function in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 87 |     const fn from(mut x: u64) -> Self {
[INFO] [stderr]    |              ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `palindromeda` (lib) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/palindromeda-4edd3c1c021094c3)
[INFO] [stdout] 
[INFO] [stdout] running 14 tests
[INFO] [stdout] test tests::test_palindrome_closest ... ok
[INFO] [stdout] test tests::test_palindrome_construct ... ok
[INFO] [stdout] test tests::test_palindrome_le ... ok
[INFO] [stdout] test tests::test_palindrome_next ... ok
[INFO] [stdout] test tests::test_palindromeiter_first_n_palindromes_from ... ok
[INFO] [stdout] test tests::test_palindromeiter_iterate ... ok
[INFO] [stdout] test tests::test_palindromeiter_iterate_rev ... ok
[INFO] [stdout] test tests::test_palindromeiter_len ... ok
[INFO] [stdout] test tests::test_palindrome_previous ... ok
[INFO] [stdout] test tests::test_palindromeiter_first_n_palindromes ... ok
[INFO] [stdout] test tests::test_palindrome_ge ... ok
[INFO] [stdout] test tests::test_palindrome_construct_panic_on_too_big_length - should panic ... ok
[INFO] [stdout] test tests::test_palindrome_construct_panic_on_too_short_length - should panic ... ok
[INFO] [stdout] test tests::test_palindrome_nth ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 14 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.21s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests palindromeda
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 8) ... ok
[INFO] [stdout] test src/lib.rs - (line 28) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.29s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "189bc8c95ffd571f68986fa9862fdad097fe9af4ae59e1a793511c5157f83a3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "189bc8c95ffd571f68986fa9862fdad097fe9af4ae59e1a793511c5157f83a3d", kill_on_drop: false }`
[INFO] [stdout] 189bc8c95ffd571f68986fa9862fdad097fe9af4ae59e1a793511c5157f83a3d
