[INFO] fetching crate subway 0.1.2...
[INFO] testing subway-0.1.2 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate subway 0.1.2 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate subway 0.1.2
[INFO] finished tweaking crates.io crate subway 0.1.2
[INFO] tweaked toml for crates.io crate subway 0.1.2 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate subway 0.1.2 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] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 10 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.5.6 (available: v0.9.2)
[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] e18dd88a3e175eb1ce1126e2ef81cc0a449ec361037e282947eb86e0d33e63b2
[INFO] running `Command { std: "docker" "start" "-a" "e18dd88a3e175eb1ce1126e2ef81cc0a449ec361037e282947eb86e0d33e63b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e18dd88a3e175eb1ce1126e2ef81cc0a449ec361037e282947eb86e0d33e63b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e18dd88a3e175eb1ce1126e2ef81cc0a449ec361037e282947eb86e0d33e63b2", kill_on_drop: false }`
[INFO] [stdout] e18dd88a3e175eb1ce1126e2ef81cc0a449ec361037e282947eb86e0d33e63b2
[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] d535bf722d7fe57a05b00316a6670184c9cb58b5b00ab25ef14b2ba2a413fd26
[INFO] running `Command { std: "docker" "start" "-a" "d535bf722d7fe57a05b00316a6670184c9cb58b5b00ab25ef14b2ba2a413fd26", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling subway v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `print` is never used
[INFO] [stdout]    --> src/skiplist.rs:574:8
[INFO] [stdout]     |
[INFO] [stdout] 266 | / impl<K, V> SkipList<K, V>
[INFO] [stdout] 267 | | where
[INFO] [stdout] 268 | |     K: Ord + Clone + Display,
[INFO] [stdout] 269 | |     V: Clone,
[INFO] [stdout]     | |_____________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 574 |       fn print(&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 1.67s
[INFO] running `Command { std: "docker" "inspect" "d535bf722d7fe57a05b00316a6670184c9cb58b5b00ab25ef14b2ba2a413fd26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d535bf722d7fe57a05b00316a6670184c9cb58b5b00ab25ef14b2ba2a413fd26", kill_on_drop: false }`
[INFO] [stdout] d535bf722d7fe57a05b00316a6670184c9cb58b5b00ab25ef14b2ba2a413fd26
[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] ef1c7b52980a8efccc21abbbf702d28871ce5320b6101581f80359d387bda33e
[INFO] running `Command { std: "docker" "start" "-a" "ef1c7b52980a8efccc21abbbf702d28871ce5320b6101581f80359d387bda33e", kill_on_drop: false }`
[INFO] [stderr]    Compiling subway v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `print` is never used
[INFO] [stdout]    --> src/skiplist.rs:574:8
[INFO] [stdout]     |
[INFO] [stdout] 266 | / impl<K, V> SkipList<K, V>
[INFO] [stdout] 267 | | where
[INFO] [stdout] 268 | |     K: Ord + Clone + Display,
[INFO] [stdout] 269 | |     V: Clone,
[INFO] [stdout]     | |_____________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 574 |       fn print(&self) {
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print` is never used
[INFO] [stdout]    --> src/skiplist.rs:574:8
[INFO] [stdout]     |
[INFO] [stdout] 266 | / impl<K, V> SkipList<K, V>
[INFO] [stdout] 267 | | where
[INFO] [stdout] 268 | |     K: Ord + Clone + Display,
[INFO] [stdout] 269 | |     V: Clone,
[INFO] [stdout]     | |_____________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 574 |       fn print(&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 0.71s
[INFO] running `Command { std: "docker" "inspect" "ef1c7b52980a8efccc21abbbf702d28871ce5320b6101581f80359d387bda33e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef1c7b52980a8efccc21abbbf702d28871ce5320b6101581f80359d387bda33e", kill_on_drop: false }`
[INFO] [stdout] ef1c7b52980a8efccc21abbbf702d28871ce5320b6101581f80359d387bda33e
[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] d81f84072d3d1d9040a257f00ecdba8c3497eabbc6fd718e8333167524ee3514
[INFO] running `Command { std: "docker" "start" "-a" "d81f84072d3d1d9040a257f00ecdba8c3497eabbc6fd718e8333167524ee3514", kill_on_drop: false }`
[INFO] [stderr] warning: method `print` is never used
[INFO] [stderr]    --> src/skiplist.rs:574:8
[INFO] [stderr]     |
[INFO] [stderr] 266 | / impl<K, V> SkipList<K, V>
[INFO] [stderr] 267 | | where
[INFO] [stderr] 268 | |     K: Ord + Clone + Display,
[INFO] [stderr] 269 | |     V: Clone,
[INFO] [stderr]     | |_____________- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 574 |       fn print(&self) {
[INFO] [stderr]     |          ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `subway` (lib) generated 1 warning
[INFO] [stderr] warning: `subway` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/subway-37bb39420de23925)
[INFO] [stdout] 
[INFO] [stdout] running 22 tests
[INFO] [stdout] test skiplist::tests::test_bisect_after_larger_node ... ok
[INFO] [stdout] test skiplist::tests::test_bisect_after ... ok
[INFO] [stdout] test skiplist::tests::test_bisect_after_when_insertion_point_is_at_end ... ok
[INFO] [stdout] test skiplist::tests::test_bisect_after_with_last_node ... ok
[INFO] [stdout] test skiplist::tests::test_bisect_when_key_does_not_exist ... ok
[INFO] [stdout] test skiplist::tests::test_bisect_after_when_node_does_not_exist ... ok
[INFO] [stdout] test skiplist::tests::test_bisect_when_key_exists ... ok
[INFO] [stdout] test skiplist::tests::test_level_insert_after_tail ... ok
[INFO] [stdout] test skiplist::tests::test_node ... ok
[INFO] [stdout] test skiplist::tests::test_delete_from_level ... ok
[INFO] [stdout] test skiplist::tests::test_level ... ok
[INFO] [stdout] test skiplist::tests::test_level_insert ... ok
[INFO] [stdout] test skiplist::tests::test_skiplist_delete ... ok
[INFO] [stdout] test skiplist::tests::test_skiplist ... ok
[INFO] [stdout] test skiplist::tests::test_skiplist_get ... ok
[INFO] [stdout] test tests::test_operations ... ok
[INFO] [stdout] test tests::test_skiplist ... ok
[INFO] [stdout] test skiplist::tests::test_skiplist_sorted ... ok
[INFO] [stdout] test skiplist::tests::test_skiplist_insert ... ok
[INFO] [stdout] test tests::test_bisect ... ok
[INFO] [stdout] test skiplist::tests::test_level_insert_after ... ok
[INFO] [stdout] test skiplist::tests::test_level_is_sorted ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 22 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests subway
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K,V>::is_empty (line 492) ... ok
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K,V>::collect (line 450) ... ok
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K,V>::insert (line 292) ... ok
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K,V>::delete (line 384) ... ok
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K,V>::len (line 476) ... ok
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K,V>::bisect (line 411) ... ok
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K,V>::get (line 347) ... ok
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K,V>::new (line 274) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.93s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d81f84072d3d1d9040a257f00ecdba8c3497eabbc6fd718e8333167524ee3514", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d81f84072d3d1d9040a257f00ecdba8c3497eabbc6fd718e8333167524ee3514", kill_on_drop: false }`
[INFO] [stdout] d81f84072d3d1d9040a257f00ecdba8c3497eabbc6fd718e8333167524ee3514