[INFO] fetching crate hopcroft-karp 0.2.1... [INFO] testing hopcroft-karp-0.2.1 against beta-2025-09-21 for beta-1.91-3 [INFO] extracting crate hopcroft-karp 0.2.1 into /workspace/builds/worker-6-tc2/source [INFO] started tweaking crates.io crate hopcroft-karp 0.2.1 [INFO] finished tweaking crates.io crate hopcroft-karp 0.2.1 [INFO] tweaked toml for crates.io crate hopcroft-karp 0.2.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate hopcroft-karp 0.2.1 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 16 packages to latest compatible versions [INFO] [stderr] Adding rand v0.8.5 (available: v0.9.2) [INFO] [stderr] Adding rand_chacha v0.3.1 (available: v0.9.0) [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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 7a3b30d8ed75c38eefc28efcc3021cf70e0348fd29833e51e81b2aae436d284d [INFO] running `Command { std: "docker" "start" "-a" "7a3b30d8ed75c38eefc28efcc3021cf70e0348fd29833e51e81b2aae436d284d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "7a3b30d8ed75c38eefc28efcc3021cf70e0348fd29833e51e81b2aae436d284d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7a3b30d8ed75c38eefc28efcc3021cf70e0348fd29833e51e81b2aae436d284d", kill_on_drop: false }` [INFO] [stdout] 7a3b30d8ed75c38eefc28efcc3021cf70e0348fd29833e51e81b2aae436d284d [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] fdd4b05ed1bac7729ae61ee48e9ccd00390d236d2cfb004978186f88d1e7498a [INFO] running `Command { std: "docker" "start" "-a" "fdd4b05ed1bac7729ae61ee48e9ccd00390d236d2cfb004978186f88d1e7498a", kill_on_drop: false }` [INFO] [stderr] Compiling fxhash v0.2.1 [INFO] [stderr] Compiling hopcroft-karp v0.2.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing [INFO] [stdout] --> src/lib.rs:250:42 [INFO] [stdout] | [INFO] [stdout] 250 | fn neighbours<'a>(&'a self, u:&V) -> std::collections::hash_set::Iter { [INFO] [stdout] | -- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is named 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: consistently use `'a` [INFO] [stdout] | [INFO] [stdout] 250 | fn neighbours<'a>(&'a self, u:&V) -> std::collections::hash_set::Iter<'a, V> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing [INFO] [stdout] --> src/lib.rs:254:65 [INFO] [stdout] | [INFO] [stdout] 254 | fn neighbours_guarded<'a>(&'a self, guarded:&Guarded) -> std::collections::hash_set::Iter { [INFO] [stdout] | -- the lifetime is named here ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] help: consistently use `'a` [INFO] [stdout] | [INFO] [stdout] 254 | fn neighbours_guarded<'a>(&'a self, guarded:&Guarded) -> std::collections::hash_set::Iter<'a, V> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.36s [INFO] running `Command { std: "docker" "inspect" "fdd4b05ed1bac7729ae61ee48e9ccd00390d236d2cfb004978186f88d1e7498a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "fdd4b05ed1bac7729ae61ee48e9ccd00390d236d2cfb004978186f88d1e7498a", kill_on_drop: false }` [INFO] [stdout] fdd4b05ed1bac7729ae61ee48e9ccd00390d236d2cfb004978186f88d1e7498a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] c9d839d3eb801fa9ae67403ee2553c237c6ef3566903b584e92e68c8c0b60064 [INFO] running `Command { std: "docker" "start" "-a" "c9d839d3eb801fa9ae67403ee2553c237c6ef3566903b584e92e68c8c0b60064", kill_on_drop: false }` [INFO] [stderr] Compiling zerocopy v0.8.27 [INFO] [stderr] Compiling getrandom v0.2.16 [INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing [INFO] [stdout] --> src/lib.rs:250:42 [INFO] [stdout] | [INFO] [stdout] 250 | fn neighbours<'a>(&'a self, u:&V) -> std::collections::hash_set::Iter { [INFO] [stdout] | -- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is named 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: consistently use `'a` [INFO] [stdout] | [INFO] [stdout] 250 | fn neighbours<'a>(&'a self, u:&V) -> std::collections::hash_set::Iter<'a, V> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing [INFO] [stdout] --> src/lib.rs:254:65 [INFO] [stdout] | [INFO] [stdout] 254 | fn neighbours_guarded<'a>(&'a self, guarded:&Guarded) -> std::collections::hash_set::Iter { [INFO] [stdout] | -- the lifetime is named here ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] help: consistently use `'a` [INFO] [stdout] | [INFO] [stdout] 254 | fn neighbours_guarded<'a>(&'a self, guarded:&Guarded) -> std::collections::hash_set::Iter<'a, V> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling rand_core v0.6.4 [INFO] [stderr] Compiling ppv-lite86 v0.2.21 [INFO] [stderr] Compiling rand_chacha v0.3.1 [INFO] [stderr] Compiling rand v0.8.5 [INFO] [stderr] Compiling hopcroft-karp v0.2.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing [INFO] [stdout] --> src/lib.rs:250:42 [INFO] [stdout] | [INFO] [stdout] 250 | fn neighbours<'a>(&'a self, u:&V) -> std::collections::hash_set::Iter { [INFO] [stdout] | -- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is named 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: consistently use `'a` [INFO] [stdout] | [INFO] [stdout] 250 | fn neighbours<'a>(&'a self, u:&V) -> std::collections::hash_set::Iter<'a, V> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing [INFO] [stdout] --> src/lib.rs:254:65 [INFO] [stdout] | [INFO] [stdout] 254 | fn neighbours_guarded<'a>(&'a self, guarded:&Guarded) -> std::collections::hash_set::Iter { [INFO] [stdout] | -- the lifetime is named here ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] help: consistently use `'a` [INFO] [stdout] | [INFO] [stdout] 254 | fn neighbours_guarded<'a>(&'a self, guarded:&Guarded) -> std::collections::hash_set::Iter<'a, V> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 6.41s [INFO] running `Command { std: "docker" "inspect" "c9d839d3eb801fa9ae67403ee2553c237c6ef3566903b584e92e68c8c0b60064", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c9d839d3eb801fa9ae67403ee2553c237c6ef3566903b584e92e68c8c0b60064", kill_on_drop: false }` [INFO] [stdout] c9d839d3eb801fa9ae67403ee2553c237c6ef3566903b584e92e68c8c0b60064 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] b91c9ccaafa08ad25be99b4fe9bb23e499544cf150db7a286a9a473815e054c4 [INFO] running `Command { std: "docker" "start" "-a" "b91c9ccaafa08ad25be99b4fe9bb23e499544cf150db7a286a9a473815e054c4", kill_on_drop: false }` [INFO] [stderr] warning: hiding a lifetime that's named elsewhere is confusing [INFO] [stderr] --> src/lib.rs:250:42 [INFO] [stderr] | [INFO] [stderr] 250 | fn neighbours<'a>(&'a self, u:&V) -> std::collections::hash_set::Iter { [INFO] [stderr] | -- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stderr] | | [INFO] [stderr] | the lifetime is named 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: consistently use `'a` [INFO] [stderr] | [INFO] [stderr] 250 | fn neighbours<'a>(&'a self, u:&V) -> std::collections::hash_set::Iter<'a, V> { [INFO] [stderr] | +++ [INFO] [stderr] [INFO] [stderr] warning: hiding a lifetime that's named elsewhere is confusing [INFO] [stderr] --> src/lib.rs:254:65 [INFO] [stderr] | [INFO] [stderr] 254 | fn neighbours_guarded<'a>(&'a self, guarded:&Guarded) -> std::collections::hash_set::Iter { [INFO] [stderr] | -- the lifetime is named here ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stderr] | [INFO] [stderr] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stderr] help: consistently use `'a` [INFO] [stderr] | [INFO] [stderr] 254 | fn neighbours_guarded<'a>(&'a self, guarded:&Guarded) -> std::collections::hash_set::Iter<'a, V> { [INFO] [stderr] | +++ [INFO] [stderr] [INFO] [stderr] warning: `hopcroft-karp` (lib) generated 2 warnings (run `cargo fix --lib -p hopcroft-karp` to apply 2 suggestions) [INFO] [stderr] warning: `hopcroft-karp` (lib test) generated 2 warnings (2 duplicates) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/hopcroft_karp-a20bf5b51b24c65e) [INFO] [stdout] [INFO] [stdout] running 6 tests [INFO] [stdout] test tests::test_edge_cases ... ok [INFO] [stdout] test tests::test_spiderman ... ok [INFO] [stdout] test tests::test_basic ... ok [INFO] [stdout] test tests::test_random_lopsided ... ok [INFO] [stdout] test tests::test_random_perfect ... ok [INFO] [stdout] test tests::test_non_bipartite - should panic ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s [INFO] [stdout] [INFO] [stderr] Doc-tests hopcroft_karp [INFO] [stdout] [INFO] [stdout] running 2 tests [INFO] [stdout] test src/lib.rs - (line 3) ... ok [INFO] [stdout] test src/lib.rs - (line 13) ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.63s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "b91c9ccaafa08ad25be99b4fe9bb23e499544cf150db7a286a9a473815e054c4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b91c9ccaafa08ad25be99b4fe9bb23e499544cf150db7a286a9a473815e054c4", kill_on_drop: false }` [INFO] [stdout] b91c9ccaafa08ad25be99b4fe9bb23e499544cf150db7a286a9a473815e054c4