[INFO] fetching crate hopcroft-karp 0.2.1...
[INFO] testing hopcroft-karp-0.2.1 against try#a7ce54db9b096bd1098d07c645b489195a667c9f for pr-137940
[INFO] extracting crate hopcroft-karp 0.2.1 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate hopcroft-karp 0.2.1 on toolchain a7ce54db9b096bd1098d07c645b489195a667c9f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "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: v0.9.0)
[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" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d7c3ea62f6b3b155fc447c6270004a22376e5f673b15a7e891d2c0004cece3b8
[INFO] running `Command { std: "docker" "start" "-a" "d7c3ea62f6b3b155fc447c6270004a22376e5f673b15a7e891d2c0004cece3b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7c3ea62f6b3b155fc447c6270004a22376e5f673b15a7e891d2c0004cece3b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7c3ea62f6b3b155fc447c6270004a22376e5f673b15a7e891d2c0004cece3b8", kill_on_drop: false }`
[INFO] [stdout] d7c3ea62f6b3b155fc447c6270004a22376e5f673b15a7e891d2c0004cece3b8
[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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55bde2b126f6d901c111951884afab77ebb20039a74fce70e5e620fbdb0ef56d
[INFO] running `Command { std: "docker" "start" "-a" "55bde2b126f6d901c111951884afab77ebb20039a74fce70e5e620fbdb0ef56d", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling hopcroft-karp v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/lib.rs:250:74
[INFO] [stdout]     |
[INFO] [stdout] 250 |     fn neighbours<'a>(&'a self, u:&V) -> std::collections::hash_set::Iter<V>  {
[INFO] [stdout]     |                   -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/lib.rs:254:97
[INFO] [stdout]     |
[INFO] [stdout] 254 |     fn neighbours_guarded<'a>(&'a self, guarded:&Guarded<V>) -> std::collections::hash_set::Iter<V>  {
[INFO] [stdout]     |                           -- lifetime `'a` declared here                                        ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `Command { std: "docker" "inspect" "55bde2b126f6d901c111951884afab77ebb20039a74fce70e5e620fbdb0ef56d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55bde2b126f6d901c111951884afab77ebb20039a74fce70e5e620fbdb0ef56d", kill_on_drop: false }`
[INFO] [stdout] 55bde2b126f6d901c111951884afab77ebb20039a74fce70e5e620fbdb0ef56d
[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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1516cd7bf606332bda858ced738bf3108f0c1cceeba9cb79f59b0c8585ae46aa
[INFO] running `Command { std: "docker" "start" "-a" "1516cd7bf606332bda858ced738bf3108f0c1cceeba9cb79f59b0c8585ae46aa", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.171
[INFO] [stderr]    Compiling zerocopy v0.8.23
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/lib.rs:250:74
[INFO] [stdout]     |
[INFO] [stdout] 250 |     fn neighbours<'a>(&'a self, u:&V) -> std::collections::hash_set::Iter<V>  {
[INFO] [stdout]     |                   -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/lib.rs:254:97
[INFO] [stdout]     |
[INFO] [stdout] 254 |     fn neighbours_guarded<'a>(&'a self, guarded:&Guarded<V>) -> std::collections::hash_set::Iter<V>  {
[INFO] [stdout]     |                           -- lifetime `'a` declared here                                        ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling getrandom v0.2.15
[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: elided lifetime has a name
[INFO] [stdout]    --> src/lib.rs:250:74
[INFO] [stdout]     |
[INFO] [stdout] 250 |     fn neighbours<'a>(&'a self, u:&V) -> std::collections::hash_set::Iter<V>  {
[INFO] [stdout]     |                   -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/lib.rs:254:97
[INFO] [stdout]     |
[INFO] [stdout] 254 |     fn neighbours_guarded<'a>(&'a self, guarded:&Guarded<V>) -> std::collections::hash_set::Iter<V>  {
[INFO] [stdout]     |                           -- lifetime `'a` declared here                                        ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 6.08s
[INFO] running `Command { std: "docker" "inspect" "1516cd7bf606332bda858ced738bf3108f0c1cceeba9cb79f59b0c8585ae46aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1516cd7bf606332bda858ced738bf3108f0c1cceeba9cb79f59b0c8585ae46aa", kill_on_drop: false }`
[INFO] [stdout] 1516cd7bf606332bda858ced738bf3108f0c1cceeba9cb79f59b0c8585ae46aa
[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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c386612e0d1e768439ec64c84e63c5e93a1848dfedd9eef7be289aadd4ddae3e
[INFO] running `Command { std: "docker" "start" "-a" "c386612e0d1e768439ec64c84e63c5e93a1848dfedd9eef7be289aadd4ddae3e", kill_on_drop: false }`
[INFO] [stderr] warning: elided lifetime has a name
[INFO] [stderr]    --> src/lib.rs:250:74
[INFO] [stderr]     |
[INFO] [stderr] 250 |     fn neighbours<'a>(&'a self, u:&V) -> std::collections::hash_set::Iter<V>  {
[INFO] [stderr]     |                   -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: elided lifetime has a name
[INFO] [stderr]    --> src/lib.rs:254:97
[INFO] [stderr]     |
[INFO] [stderr] 254 |     fn neighbours_guarded<'a>(&'a self, guarded:&Guarded<V>) -> std::collections::hash_set::Iter<V>  {
[INFO] [stderr]     |                           -- lifetime `'a` declared here                                        ^ this elided lifetime gets resolved as `'a`
[INFO] [stderr] 
[INFO] [stderr] warning: `hopcroft-karp` (lib) generated 2 warnings
[INFO] [stderr] warning: `hopcroft-karp` (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/hopcroft_karp-bc2a029a31f6005e)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test tests::test_basic ... ok
[INFO] [stdout] test tests::test_edge_cases ... ok
[INFO] [stdout] test tests::test_random_perfect ... ok
[INFO] [stdout] test tests::test_random_lopsided ... ok
[INFO] [stdout] test tests::test_spiderman ... 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 0.04s
[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 0.97s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c386612e0d1e768439ec64c84e63c5e93a1848dfedd9eef7be289aadd4ddae3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c386612e0d1e768439ec64c84e63c5e93a1848dfedd9eef7be289aadd4ddae3e", kill_on_drop: false }`
[INFO] [stdout] c386612e0d1e768439ec64c84e63c5e93a1848dfedd9eef7be289aadd4ddae3e