[INFO] cloning repository https://github.com/hedon-rust-road/algorithms
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hedon-rust-road/algorithms" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhedon-rust-road%2Falgorithms", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhedon-rust-road%2Falgorithms'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6019c370d3d4a73696f62b14075ac0c1e82da267
[INFO] testing hedon-rust-road/algorithms against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhedon-rust-road%2Falgorithms" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/hedon-rust-road/algorithms
[INFO] finished tweaking git repo https://github.com/hedon-rust-road/algorithms
[INFO] tweaked toml for git repo https://github.com/hedon-rust-road/algorithms written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/hedon-rust-road/algorithms 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 git repo https://github.com/hedon-rust-road/algorithms 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-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 14e69c5ec9f23b5490f1843a560193e4d1ddaf5a7168a786964a28baa470bc18
[INFO] running `Command { std: "docker" "start" "-a" "14e69c5ec9f23b5490f1843a560193e4d1ddaf5a7168a786964a28baa470bc18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14e69c5ec9f23b5490f1843a560193e4d1ddaf5a7168a786964a28baa470bc18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14e69c5ec9f23b5490f1843a560193e4d1ddaf5a7168a786964a28baa470bc18", kill_on_drop: false }`
[INFO] [stdout] 14e69c5ec9f23b5490f1843a560193e4d1ddaf5a7168a786964a28baa470bc18
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ff28bc30b53ec9237e5416673038735b9645af7fdc3c0c46c4214d268b9d3c6
[INFO] running `Command { std: "docker" "start" "-a" "9ff28bc30b53ec9237e5416673038735b9645af7fdc3c0c46c4214d268b9d3c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.178
[INFO] [stderr]    Compiling zerocopy v0.8.31
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]    Compiling rand_core v0.9.3
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling rand_chacha v0.9.0
[INFO] [stderr]    Compiling rand v0.9.2
[INFO] [stderr]    Compiling algorithms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/stack/stack.rs:72:17
[INFO] [stdout]    |
[INFO] [stdout] 72 |     pub fn iter(&self) -> Iter<T> {
[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] 72 |     pub fn iter(&self) -> Iter<'_, T> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/stack/stack.rs:80:21
[INFO] [stdout]    |
[INFO] [stdout] 80 |     pub fn iter_mut(&mut self) -> IterMut<T> {
[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] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 80 |     pub fn iter_mut(&mut self) -> IterMut<'_, T> {
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.92s
[INFO] running `Command { std: "docker" "inspect" "9ff28bc30b53ec9237e5416673038735b9645af7fdc3c0c46c4214d268b9d3c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ff28bc30b53ec9237e5416673038735b9645af7fdc3c0c46c4214d268b9d3c6", kill_on_drop: false }`
[INFO] [stdout] 9ff28bc30b53ec9237e5416673038735b9645af7fdc3c0c46c4214d268b9d3c6
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eaca2ecaae27e50244939e7b7121e2f088ce6e027d093a6ef4e624b45fb4ad0d
[INFO] running `Command { std: "docker" "start" "-a" "eaca2ecaae27e50244939e7b7121e2f088ce6e027d093a6ef4e624b45fb4ad0d", kill_on_drop: false }`
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/stack/stack.rs:72:17
[INFO] [stdout]    |
[INFO] [stdout] 72 |     pub fn iter(&self) -> Iter<T> {
[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] 72 |     pub fn iter(&self) -> Iter<'_, T> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/stack/stack.rs:80:21
[INFO] [stdout]    |
[INFO] [stdout] 80 |     pub fn iter_mut(&mut self) -> IterMut<T> {
[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] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 80 |     pub fn iter_mut(&mut self) -> IterMut<'_, T> {
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling algorithms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/stack/stack.rs:72:17
[INFO] [stdout]    |
[INFO] [stdout] 72 |     pub fn iter(&self) -> Iter<T> {
[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] 72 |     pub fn iter(&self) -> Iter<'_, T> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/stack/stack.rs:80:21
[INFO] [stdout]    |
[INFO] [stdout] 80 |     pub fn iter_mut(&mut self) -> IterMut<T> {
[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] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 80 |     pub fn iter_mut(&mut self) -> IterMut<'_, T> {
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.05s
[INFO] running `Command { std: "docker" "inspect" "eaca2ecaae27e50244939e7b7121e2f088ce6e027d093a6ef4e624b45fb4ad0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eaca2ecaae27e50244939e7b7121e2f088ce6e027d093a6ef4e624b45fb4ad0d", kill_on_drop: false }`
[INFO] [stdout] eaca2ecaae27e50244939e7b7121e2f088ce6e027d093a6ef4e624b45fb4ad0d
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6f7f1cef83c484675a75684994bd88a70817b3859b4e275791106e53680b2637
[INFO] running `Command { std: "docker" "start" "-a" "6f7f1cef83c484675a75684994bd88a70817b3859b4e275791106e53680b2637", kill_on_drop: false }`
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/stack/stack.rs:72:17
[INFO] [stderr]    |
[INFO] [stderr] 72 |     pub fn iter(&self) -> Iter<T> {
[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] 72 |     pub fn iter(&self) -> Iter<'_, T> {
[INFO] [stderr]    |                                +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/stack/stack.rs:80:21
[INFO] [stderr]    |
[INFO] [stderr] 80 |     pub fn iter_mut(&mut self) -> IterMut<T> {
[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] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 80 |     pub fn iter_mut(&mut self) -> IterMut<'_, T> {
[INFO] [stderr]    |                                           +++
[INFO] [stderr] 
[INFO] [stderr] warning: `algorithms` (lib) generated 2 warnings (run `cargo fix --lib -p algorithms` to apply 2 suggestions)
[INFO] [stderr] warning: `algorithms` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/algorithms-73cbf996969fc21c)
[INFO] [stdout] 
[INFO] [stdout] running 31 tests
[INFO] [stdout] test queue::hot_potato::tests::hot_potato_should_work ... ok
[INFO] [stdout] test leetcode::leetcode_array::leetcode704::test::search_should_work ... ok
[INFO] [stdout] test leetcode::leetcode_dp::knapsack01::tests::knapsack01_should_work ... ok
[INFO] [stdout] test stack::base_convert::tests::test_base_converter_basic ... ok
[INFO] [stdout] test leetcode::leetcode_greedy::leetcode68::tests::full_justify_should_work ... ok
[INFO] [stdout] test stack::base_convert::tests::test_base_converter_hex_and_letters ... ok
[INFO] [stdout] test leetcode::leetcode_search_table::leetcode202::tests::is_happy_should_work ... ok
[INFO] [stdout] test stack::base_convert::tests::test_base_converter_large_numbers ... ok
[INFO] [stdout] test stack::base_convert::tests::test_divide_by_two_basic ... ok
[INFO] [stdout] test stack::base_convert::tests::test_divide_by_two_edge_cases ... ok
[INFO] [stdout] test stack::infix_to_postfix::tests::test_infix_to_postfix_basic ... ok
[INFO] [stdout] test stack::infix_to_postfix::tests::test_infix_to_postfix_single_operand ... ok
[INFO] [stdout] test stack::infix_to_postfix::tests::test_post_eval_basic ... ok
[INFO] [stdout] test stack::base_convert::tests::test_divide_by_two_large_number ... ok
[INFO] [stdout] test stack::infix_to_postfix::tests::test_infix_to_postfix_with_parentheses ... ok
[INFO] [stdout] test stack::stack::tests::test_into_iter ... ok
[INFO] [stdout] test stack::stack::tests::test_iter ... ok
[INFO] [stdout] test stack::stack::tests::test_iter_mut ... ok
[INFO] [stdout] test stack::infix_to_postfix::tests::test_post_eval_with_division ... ok
[INFO] [stdout] test stack::stack::tests::test_stack_clear ... ok
[INFO] [stdout] test stack::stack::tests::test_stack_peek_and_peek_mut ... ok
[INFO] [stdout] test stack::infix_to_postfix::tests::test_infix_to_postfix_complex ... ok
[INFO] [stdout] test stack::par_checker::tests::test_par_checker_unbalanced ... ok
[INFO] [stdout] test stack::infix_to_postfix::tests::test_post_eval_complex ... ok
[INFO] [stdout] test stack::infix_to_postfix::tests::test_infix_to_postfix_with_numbers ... ok
[INFO] [stdout] test stack::stack::tests::test_stack_push_and_pop ... ok
[INFO] [stdout] test stack::par_checker::tests::test_par_checker_with_non_bracket_chars ... ok
[INFO] [stdout] test stack::par_checker::tests::test_par_checker_balanced ... ok
[INFO] [stdout] test stack::infix_to_postfix::tests::test_infix_to_postfix_with_precedence ... ok
[INFO] [stdout] test stack::infix_to_postfix::tests::test_post_eval_division_by_zero - should panic ... ok
[INFO] [stderr]    Doc-tests algorithms
[INFO] [stdout] test stack::base_convert::tests::test_base_converter_edge_cases ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 31 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[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" "6f7f1cef83c484675a75684994bd88a70817b3859b4e275791106e53680b2637", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f7f1cef83c484675a75684994bd88a70817b3859b4e275791106e53680b2637", kill_on_drop: false }`
[INFO] [stdout] 6f7f1cef83c484675a75684994bd88a70817b3859b4e275791106e53680b2637
