[INFO] fetching crate stacking-iterator 1.0.0...
[INFO] testing stacking-iterator-1.0.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate stacking-iterator 1.0.0 into /workspace/builds/worker-0-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-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate stacking-iterator 1.0.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "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-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c0f1fb7b217bcf5b493ea73e0fd467ea8ceaf20637e3386ca2c2e7e5bc28cc49
[INFO] running `Command { std: "docker" "start" "-a" "c0f1fb7b217bcf5b493ea73e0fd467ea8ceaf20637e3386ca2c2e7e5bc28cc49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0f1fb7b217bcf5b493ea73e0fd467ea8ceaf20637e3386ca2c2e7e5bc28cc49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0f1fb7b217bcf5b493ea73e0fd467ea8ceaf20637e3386ca2c2e7e5bc28cc49", kill_on_drop: false }`
[INFO] [stdout] c0f1fb7b217bcf5b493ea73e0fd467ea8ceaf20637e3386ca2c2e7e5bc28cc49
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e9602f7cc16d4b4a950d2b5ce71c52c46a8b57cd74d423c2d2e4d872d8ec8384
[INFO] running `Command { std: "docker" "start" "-a" "e9602f7cc16d4b4a950d2b5ce71c52c46a8b57cd74d423c2d2e4d872d8ec8384", 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 0.31s
[INFO] running `Command { std: "docker" "inspect" "e9602f7cc16d4b4a950d2b5ce71c52c46a8b57cd74d423c2d2e4d872d8ec8384", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9602f7cc16d4b4a950d2b5ce71c52c46a8b57cd74d423c2d2e4d872d8ec8384", kill_on_drop: false }`
[INFO] [stdout] e9602f7cc16d4b4a950d2b5ce71c52c46a8b57cd74d423c2d2e4d872d8ec8384
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 079a1112d2a55262ab74265257324b170760fd8de48a985665298cf470ce3acc
[INFO] running `Command { std: "docker" "start" "-a" "079a1112d2a55262ab74265257324b170760fd8de48a985665298cf470ce3acc", 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 0.79s
[INFO] running `Command { std: "docker" "inspect" "079a1112d2a55262ab74265257324b170760fd8de48a985665298cf470ce3acc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "079a1112d2a55262ab74265257324b170760fd8de48a985665298cf470ce3acc", kill_on_drop: false }`
[INFO] [stdout] 079a1112d2a55262ab74265257324b170760fd8de48a985665298cf470ce3acc
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 345c8c23729f68812de5b402f62165d0000027f04571274e3d2bb52208b2a34e
[INFO] running `Command { std: "docker" "start" "-a" "345c8c23729f68812de5b402f62165d0000027f04571274e3d2bb52208b2a34e", 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_linked_list ... ok
[INFO] [stdout] test tests::contract_string ... ok
[INFO] [stdout] test tests::contract_vec_deque ... ok
[INFO] [stdout] test tests::extend_pop ... ok
[INFO] [stdout] test tests::empty ... ok
[INFO] [stdout] test tests::extend_push ... ok
[INFO] [stdout] test tests::hello_hell ... ok
[INFO] [stdout] test tests::hello ... ok
[INFO] [stdout] test tests::contract_vec ... ok
[INFO] [stdout] test tests::hello_world ... ok
[INFO] [stdout] test tests::implode_empty_linked_list - should panic ... ok
[INFO] [stdout] test tests::implode_empty_string - should panic ... ok
[INFO] [stdout] test tests::sneaky_empty ... 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_vec - should panic ... ok
[INFO] [stdout] test tests::implode_vec_deque - should panic ... ok
[INFO] [stdout] test tests::implode_string - should panic ... ok
[INFO] [stdout] test tests::implode_linked_list - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 19 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests stacking_iterator
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test src/lib.rs - StackingIteratorExt::collecting (line 330) ... ok
[INFO] [stdout] test src/lib.rs - Instruction<T>::into_operation (line 70) ... ok
[INFO] [stdout] test src/lib.rs - StackingIteratorExt::operate (line 363) ... ok
[INFO] [stdout] test src/lib.rs - Instruction<T>::as_operation (line 89) ... ok
[INFO] [stdout] test src/lib.rs - Operation<T>::into_item (line 127) ... ok
[INFO] [stdout] test src/lib.rs - Operation<T>::as_item (line 145) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.51s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "345c8c23729f68812de5b402f62165d0000027f04571274e3d2bb52208b2a34e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "345c8c23729f68812de5b402f62165d0000027f04571274e3d2bb52208b2a34e", kill_on_drop: false }`
[INFO] [stdout] 345c8c23729f68812de5b402f62165d0000027f04571274e3d2bb52208b2a34e