[INFO] fetching crate stacking-iterator 1.0.0...
[INFO] testing stacking-iterator-1.0.0 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate stacking-iterator 1.0.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate stacking-iterator 1.0.0
[INFO] finished tweaking crates.io crate stacking-iterator 1.0.0
[INFO] tweaked toml for crates.io crate stacking-iterator 1.0.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate stacking-iterator 1.0.0 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 21233d2c5c13addf9e297ccfde78c74d7362ce6bcd2d6374029e465857a7eb90
[INFO] running `Command { std: "docker" "start" "-a" "21233d2c5c13addf9e297ccfde78c74d7362ce6bcd2d6374029e465857a7eb90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "21233d2c5c13addf9e297ccfde78c74d7362ce6bcd2d6374029e465857a7eb90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21233d2c5c13addf9e297ccfde78c74d7362ce6bcd2d6374029e465857a7eb90", kill_on_drop: false }`
[INFO] [stdout] 21233d2c5c13addf9e297ccfde78c74d7362ce6bcd2d6374029e465857a7eb90
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 413e82dcd51230f71f6103c5035c2a352aece8c8283cb4c62576cf3c42143ecb
[INFO] running `Command { std: "docker" "start" "-a" "413e82dcd51230f71f6103c5035c2a352aece8c8283cb4c62576cf3c42143ecb", kill_on_drop: false }`
[INFO] [stderr]    Compiling stacking-iterator v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "413e82dcd51230f71f6103c5035c2a352aece8c8283cb4c62576cf3c42143ecb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "413e82dcd51230f71f6103c5035c2a352aece8c8283cb4c62576cf3c42143ecb", kill_on_drop: false }`
[INFO] [stdout] 413e82dcd51230f71f6103c5035c2a352aece8c8283cb4c62576cf3c42143ecb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c561f91c9d50f0966597226ded0615307290cc3cf72d9707d09b0228ecd0bac8
[INFO] running `Command { std: "docker" "start" "-a" "c561f91c9d50f0966597226ded0615307290cc3cf72d9707d09b0228ecd0bac8", kill_on_drop: false }`
[INFO] [stderr]    Compiling stacking-iterator v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `Command { std: "docker" "inspect" "c561f91c9d50f0966597226ded0615307290cc3cf72d9707d09b0228ecd0bac8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c561f91c9d50f0966597226ded0615307290cc3cf72d9707d09b0228ecd0bac8", kill_on_drop: false }`
[INFO] [stdout] c561f91c9d50f0966597226ded0615307290cc3cf72d9707d09b0228ecd0bac8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b9ff2a669a5d9981e3b938201b336f5343fd33f344310c99cb1de19672990814
[INFO] running `Command { std: "docker" "start" "-a" "b9ff2a669a5d9981e3b938201b336f5343fd33f344310c99cb1de19672990814", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/stacking_iterator-0c6971c6e2ae308c)
[INFO] [stdout] 
[INFO] [stdout] running 19 tests
[INFO] [stdout] test tests::contract_string ... ok
[INFO] [stdout] test tests::contract_linked_list ... ok
[INFO] [stdout] test tests::contract_vec_deque ... ok
[INFO] [stdout] test tests::contract_vec ... ok
[INFO] [stdout] test tests::extend_push ... ok
[INFO] [stdout] test tests::empty ... ok
[INFO] [stdout] test tests::extend_pop ... ok
[INFO] [stdout] test tests::hello ... ok
[INFO] [stdout] test tests::hello_world ... ok
[INFO] [stdout] test tests::hello_hell ... ok
[INFO] [stdout] test tests::sneaky_empty ... ok
[INFO] [stdout] test tests::implode_empty_linked_list - should panic ... ok
[INFO] [stdout] test tests::implode_empty_vec_deque - should panic ... ok
[INFO] [stdout] test tests::implode_empty_vec - should panic ... ok
[INFO] [stdout] test tests::implode_empty_string - should panic ... ok
[INFO] [stdout] test tests::implode_linked_list - should panic ... ok
[INFO] [stdout] test tests::implode_string - should panic ... ok
[INFO] [stdout] test tests::implode_vec - should panic ... ok
[INFO] [stdout] test tests::implode_vec_deque - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 19 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests stacking_iterator
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test src/lib.rs - Instruction<T>::as_operation (line 89) ... ok
[INFO] [stdout] test src/lib.rs - Instruction<T>::into_operation (line 70) ... ok
[INFO] [stdout] test src/lib.rs - Operation<T>::as_item (line 145) ... ok
[INFO] [stdout] test src/lib.rs - StackingIteratorExt::collecting (line 330) ... ok
[INFO] [stdout] test src/lib.rs - Operation<T>::into_item (line 127) ... ok
[INFO] [stdout] test src/lib.rs - StackingIteratorExt::operate (line 363) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.91s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b9ff2a669a5d9981e3b938201b336f5343fd33f344310c99cb1de19672990814", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9ff2a669a5d9981e3b938201b336f5343fd33f344310c99cb1de19672990814", kill_on_drop: false }`
[INFO] [stdout] b9ff2a669a5d9981e3b938201b336f5343fd33f344310c99cb1de19672990814